Abaqus User Subroutines Reference Guide 用户材料子程序帮助文档
1.1.41 UMAT
User subroutine to define a material's mechanical behavior.
Product: Abaqus/Standard
Warning: The use of this subroutine generally requires considerable expertise. Y ou are
cautioned that the implementation of any realistic constitutive model requires extensive
development and testing. Initial testing on a single-element model with prescribed
traction loading is strongly recommended.
References
“User-defined mechanical material behavior,” Section 26.7.1 of the Abaqus Analysis User's Guide
“User-defined thermal material behavior,” Section 26.7.2 of the Abaqus Analysis User's Guide
*USER MA TERIAL
“S D V I N I,” Section 4.1.11 of the Abaqus V erification Guide
“U M A T and U H Y P E R,” Section 4.1.21 of the Abaqus V erification Guide
Ov erv iew
User subroutine U M A T:
can be used to define the mechanical constitutive behavior of a material;
will be called at all material calculation points of elements for which the material definition includes a
user-defined material behavior;
can be used with any procedure that includes mechanical behavior;
can use solution-dependent state variables;
must update the stresses and solution-dependent state variables to their values at the end of the
increment for which it is called;
must provide the material Jacobian matrix, , for the mechanical constitutive model;
can be used in conjunction with user subroutine U S D F L D to redefine any field variables before they are passed in; and
is described further in “User-defined mechanical material behavior,” Section 26.7.1 of the Abaqus
Analysis User's Guide.
Storage of stress and strain components
In the stress and strain arrays and in the matrices D D S D D E, D D S D D T, and D R P L D E, direct components are stored first, followed by shear components. There are N D I direct and N S H R engineering shear components. The order of the components is defined in “Conventions,” Section 1.2.2 of the Abaqus Analysis User's Guide. Since the number of active stress and strain components varies between element types, the routine must be coded to
provide for all element types with which it will be used.
Defining local orientations
If a local orientation (“Orientations,” Section 2.2.5 of the Abaqus Analysis User's Guide) is used at the same point as user subroutine U M A T, the stress and strain components will be in the local orientation; and, in the case of finite-strain analysis, the basis system in which stress and strain components are stored rotates with the material.
Stability
Y ou should ensure that the integration scheme coded in this routine is stable—no direct provision is made to include a stability limit in the time stepping scheme based on the calculations in U M A T.
Convergence rate
D D S D D
E and—for coupled temperature-displacement and coupled thermal-electrical-structural analyses
—D D S D D T, D R P L D E, and D R P L D T must be defined accurately if rapid convergence of the overall Newton scheme is to be achieved. In most cases the accuracy of this definition is the most important factor governing the convergence rate. Since nonsymmetric equation solution is as much as four times as expensive as the corresponding symmetric system, if the constitutive Jacobian (D D S D D E) is only slightly nonsymmetric (for example, a frictional material with a small friction angle), it may be less expensive computationally to use a symmetric approximation and accept a slower convergence rate.
An incorrect definition of the material Jacobian affects only the convergence rate; the results (if obtained) are unaffected.
Special considerations for various element types
There are several special considerations that need to be noted.
A v ailability of deformation gradient
The deformation gradient is available for solid (continuum) elements, membranes, and finite-strain shells
(S3/S3R, S4, S4R, SAXs, and SAXAs). It is not available for beams or small-strain shells. It is stored as a 3× 3 matrix with component equivalence D F G R D0(I,J). For fully integrated first-order isoparametric elements (4-node quadrilaterals in two dimensions and 8-node hexahedra in three dimensions) the selectively reduced integration technique is used (also known as the technique). Thus, a modified deformation gradient
is passed into user subroutine U M A T. For more details, see “Solid isoparametric quadrilaterals and hexahedra,”Section 3.2.4 of the Abaqus Theory Guide.
Beams and shells that calculate transv erse shear energy
If user subroutine U M A T is used to describe the material of beams or shells that calculate transverse shear energy, you must specify the transverse shear stiffness as part of the beam or shell section definition to define the transverse shear behavior. See “Shell section behavior,” Section 29.6.4 of the Abaqus Analysis User's Guide, and “Choosing a beam element,” Section 29.3.3 of the Abaqus Analysis User's Guide, for information
on specifying this stiffness.
Open-section beam elements
When user subroutine U M A T is used to describe the material response of beams with open sections (for example, an I-section), the torsional stiffness is obtained as
where J is the torsional constant, A is the section area, k is a shear factor, and is the user-specified transverse shear stiffness (see “Transverse shear stiffness definition” in “Choosing a beam element,” Section
29.3.3 of the Abaqus Analysis User's Guide).
E lements w ith hourglassing modes
If this capability is used to describe the material of elements with hourglassing modes, you must define the hourglass stiffness factor for hourglass control based on the total stiffness approach as part of the element section definition. The hourglass stiffness factor is not required for enhanced hourglass control, but you can define a scaling factor for the stiffness associated with the drill degree of freedom (rotation about the surface normal). See “Section controls,” Section 27.1.4 of the Abaqus Analysis User's Guide, for information on specifying the stiffness factor.
Pipe-soil interaction elements
The constitutive behavior of the pipe-soil interaction elements (see “Pipe-soil interaction elements,” Section 32.12.1 of the Abaqus Analysis User's Guide) is defined by the force per unit length caused by relative displacement between two edges of the element. The relative-displacements are available as “strains” (S T R A N and D S T R A N). The corresponding forces per unit length must be defined in the S T R E S S array. The Jacobian matrix defines the variation of force per unit length with respect to relative displacement.
For two-dimensional elements two in-plane components of “stress” and “strain” exist (N T E N S=N D I=2, and
N S H R=0). For three-dimensional elements three components of “stress” and “strain” exist (N T E N S=N D I=3, and N S H R=0).
Large volume changes with geometric nonlinearity
If the material model allows large volume changes and geometric nonlinearity is considered, the exact definition of the consistent Jacobian should be used to ensure rapid convergence. These conditions are most commonly encountered when considering either large elastic strains or pressure-dependent plasticity. In the former case, total-form constitutive equations relating the Cauchy stress to the deformation gradient are commonly used; in the latter case, rate-form constitutive laws are generally used.
For total-form constitutive laws, the exact consistent Jacobian is defined through the variation in Kirchhoff stress:
Here, J is the determinant of the deformation gradient, is the Cauchy stress, is the virtual rate of deformation, and is the virtual spin tensor, defined as
For rate-form constitutive laws, the exact consistent Jacobian is given by
Use with incompressible elastic materials
For user-defined incompressible elastic materials, user subroutine U H Y P E R should be used rather than user subroutine U M A T. In U M A T incompressible materials must be modeled via a penalty method; that is, you must ensure that a finite bulk modulus is used. The bulk modulus should be large enough to model incompressibility sufficiently but small enough to avoid loss of precision. As a general guideline, the bulk modulus should be about – times the shear modulus. The tangent bulk modulus can be calculated from
If a hybrid element is used with user subroutine U M A T, Abaqus/Standard will replace the pressure stress calculated from your definition of S T R E S S with that derived from the Lagrange multiplier and will modify the Jacobian appropriately.
For incompressible pressure-sensitive materials the element choice is particularly important when using user subroutine U M A T. In particular, first-order wedge elements should be avoided. For these elements the technique is not used to alter the deformation gradient that is passed into user subroutine U M A T, which increases the risk of volumetric locking.
Increments for which only the Jacobian can be defined
Abaqus/Standard passes zero strain increments into user subroutine U M A T to start the first increment of all the steps and all increments of steps for which you have suppressed extrapolation (see “Defining an analysis,”Section 6.1.2 of the Abaqus Analysis User's Guide). In this case you can define only the Jacobian (D D S D D E).
Utility routines
Several utility routines may help in coding user subroutine U M A T. Their functions include determining stress invariants for a stress tensor and calculating principal values and directions for stress or strain tensors. These utility routines are discussed in detail in “Obtaining stress invariants, principal stress/strain values and directions, and rotating tensors in an Abaqus/Standard analysis,” Section 2.1.11.
U ser subroutine interface
S U B R O U T I N E U M A T(S T R E S S,S T A T E V,D D S D D E,S S E,S P D,S C D,
1R P L,D D S D D T,D R P L D E,D R P L D T,
2S T R A N,D S T R A N,T I M E,D T I M E,T E M P,D T E M P,P R E D E F,D P R E D,C M N A M E,
3N D I,N S H R,N T E N S,N S T A T V,P R O P S,N P R O P S,C O O R D S,D R O T,P N E W D T,
4C E L E N T,D F G R D0,D F G R D1,N O E L,N P T,L A Y E R,K S P T,K S T E P,K I N C)
C
I N C L U D E'A B A_P A R A M.I N C'
C H A R A C T E R*80C M N A M E
D I M
E N S I O N S T R E S S(N T E N S),S T A T E V(N S T A T V),
1D D S D D E(N T E N S,N T E N S),D D S D D T(N T E N S),D R P L D E(N T E N S),
2S T R A N(N T E N S),D S T R A N(N T E N S),T I M E(2),P R E D E F(1),D P R E D(1),
3P R O P S(N P R O P S),C O O R D S(3),D R O T(3,3),D F G R D0(3,3),D F G R D1(3,3)
user coding to define D D S D D E,S T R E S S,S T A T E V,S S E,S P D,S C D
and, if necessary,R P L,D D S D D T,D R P L D E,D R P L D T,P N E W D T
R E T U R N
E N D
V ariables to be defined
In all situations
D D S D D E(N T
E N S,N T E N S)
Jacobian matrix of the constitutive model, , where are the stress increments and are the strain increments. D D S D D E(I,J) defines the change in the I th stress component at the end of the time increment caused by an infinitesimal perturbation of the J th component of the strain increment array.
Unless you invoke the unsymmetric equation solution capability for the user-defined material,
Abaqus/Standard will use only the symmetric part of D D S D D E. The symmetric part of the matrix is
calculated by taking one half the sum of the matrix and its transpose.
S T R E S S(N T E N S)
This array is passed in as the stress tensor at the beginning of the increment and must be updated in this routine to be the stress tensor at the end of the increment. If you specified initial stresses (“Initial conditions in Abaqus/Standard and Abaqus/Explicit,” Section 34.2.1 of the Abaqus Analysis User's Guide), this array will contain the initial stresses at the start of the analysis. The size of this array depends on the value of N T E N S as defined below. In finite-strain problems the stress tensor has already been rotated to account for rigid body motion in the increment before U M A T is called, so that only the corotational part of the stress integration should be done in U M A T. The measure of stress used is “true” (Cauchy) stress.
S T A T E V(N S T A T V)
An array containing the solution-dependent state variables. These are passed in as the values at the
beginning of the increment unless they are updated in user subroutines U S D F L D or U E X P A N, in which case the updated values are passed in. In all cases S T A T E V must be returned as the values at the end of the increment. The size of the array is defined as described in “Allocating space” in “User subroutines:
overview,” Section 18.1.1 of the Abaqus Analysis User's Guide.
In finite-strain problems any vector-valued or tensor-valued state variables must be rotated to account for rigid body motion of the material, in addition to any update in the values associated with constitutive
behavior. The rotation increment matrix, D R O T, is provided for this purpose.
S S E,S P D,S C D
Specific elastic strain energy, plastic dissipation, and “creep” dissipation, respectively. These are passed in as the values at the start of the increment and should be updated to the corresponding specific energy values at the end of the increment. They have no effect on the solution, except that they are used for
energy output.
Only in a fully coupled thermal-stress or a coupled thermal-electrical-structural analysis
R P L
V olumetric heat generation per unit time at the end of the increment caused by mechanical working of the material.
D D S D D T(N T
E N S)
V ariation of the stress increments with respect to the temperature.
D R P L D E(N T
E N S)
V ariation of R P L with respect to the strain increments.
D R P L D T
V ariation of R P L with respect to the temperature.
Only in a geostatic stress procedure or a coupled pore fluid diffusion/stress analysis for pore pressure cohesive elements
R P L
R P L is used to indicate whether or not a cohesive element is open to the tangential flow of pore fluid. Set R P L equal to 0 if there is no tangential flow; otherwise, assign a nonzero value to R P L if an element is open.
Once opened, a cohesive element will remain open to the fluid flow.
V ariable that can be updated
P N E W D T
Ratio of suggested new time increment to the time increment being used (D T I M E, see discussion later in this section). This variable allows you to provide input to the automatic time incrementation algorithms in Abaqus/Standard (if automatic time incrementation is chosen). For a quasi-static procedure the automatic time stepping that Abaqus/Standard uses, which is based on techniques for integrating standard creep laws (see “Quasi-static analysis,” Section 6.2.5 of the Abaqus Analysis User's Guide), cannot be
controlled from within the U M A T subroutine.
P N E W D T is set to a large value before each call to U M A T.
If P N E W D T is redefined to be less than 1.0, Abaqus/Standard must abandon the time increment and
attempt it again with a smaller time increment. The suggested new time increment provided to the
automatic time integration algorithms is P N E W D T × D T I M E, where the P N E W D T used is the minimum value for all calls to user subroutines that allow redefinition of P N E W D T for this iteration.
If P N E W D T is given a value that is greater than 1.0 for all calls to user subroutines for this iteration and the increment converges in this iteration, Abaqus/Standard may increase the time increment. The suggested
new time increment provided to the automatic time integration algorithms is P N E W D T × D T I M E, where the P N E W D T used is the minimum value for all calls to user subroutines for this iteration.
If automatic time incrementation is not selected in the analysis procedure, values of P N E W D T that are
greater than 1.0 will be ignored and values of P N E W D T that are less than 1.0 will cause the job to terminate. V ariables passed in for information
S T R A N(N T E N S)
An array containing the total strains at the beginning of the increment. If thermal expansion is included in the same material definition, the strains passed into U M A T are the mechanical strains only (that is, the
thermal strains computed based upon the thermal expansion coefficient have been subtracted from the total strains). These strains are available for output as the “elastic” strains.
In finite-strain problems the strain components have been rotated to account for rigid body motion in the increment before U M A T is called and are approximations to logarithmic strain.
D S T R A N(N T
E N S)
Array of strain increments. If thermal expansion is included in the same material definition, these are the mechanical strain increments (the total strain increments minus the thermal strain increments).
T I M E(1)
V alue of step time at the beginning of the current increment or frequency.
T I M E(2)
V alue of total time at the beginning of the current increment.
D T I M E
Time increment.
T E M P
Temperature at the start of the increment.
D T
E M P
Increment of temperature.
P R E D E F
Array of interpolated values of predefined field variables at this point at the start of the increment, based on the values read in at the nodes.
D P R
E D
Array of increments of predefined field variables.
C M N A M E
User-defined material name, left justified. Some internal material models are given names starting with the “ABQ_” character string. To avoid conflict, you should not use “ABQ_” as the leading string for C M N A M E. N D I
Number of direct stress components at this point.
N S H R
Number of engineering shear stress components at this point.
N T E N S
Size of the stress or strain component array (N D I + N S H R).
N S T A T V
Number of solution-dependent state variables that are associated with this material type (defined as
described in “Allocating space” in “User subroutines: overview,” Section 18.1.1 of the Abaqus Analysis User's Guide).
P R O P S(N P R O P S)
User-specified array of material constants associated with this user material.
N P R O P S
User-defined number of material constants associated with this user material.
C O O R
D S
An array containing the coordinates of this point. These are the current coordinates if geometric
nonlinearity is accounted for during the step (see “Defining an analysis,” Section 6.1.2 of the Abaqus Analysis User's Guide); otherwise, the array contains the original coordinates of the point.
D R O T(3,3)
Rotation increment matrix. This matrix represents the increment of rigid body rotation of the basis system in which the components of stress (S T R E S S) and strain (S T R A N) are stored. It is provided so that vector-or tensor-valued state variables can be rotated appropriately in this subroutine: stress and strain
components are already rotated by this amount before U M A T is called. This matrix is passed in as a unit matrix for small-displacement analysis and for large-displacement analysis if the basis system for the
material point rotates with the material (as in a shell element or when a local orientation is used).
C E L E N T
Characteristic element length, which is a typical length of a line across an element for a first-order element;
it is half of the same typical length for a second-order element. For beams and trusses it is a characteristic length along the element axis. For membranes and shells it is a characteristic length in the reference
surface. For axisymmetric elements it is a characteristic length in the plane only. For cohesive
elements it is equal to the constitutive thickness.
D F G R D0(3,3)
Array containing the deformation gradient at the beginning of the increment. If a local orientation is defined at the material point, the deformation gradient components are expressed in the local coordinate system defined by the orientation at the beginning of the increment. For a discussion regarding the availability of the deformation gradient for various element types, see “Availability of deformation gradient.”
D F G R D1(3,3)
Array containing the deformation gradient at the end of the increment. If a local orientation is defined at the material point, the deformation gradient components are expressed in the local coordinate system defined by the orientation. This array is set to the identity matrix if nonlinear geometric effects are not included in the step definition associated with this increment. For a discussion regarding the availability of the
deformation gradient for various element types, see “Availability of deformation gradient.”
N O E L
Element number.
N P T
Integration point number.
L A Y E R
Layer number (for composite shells and layered solids).
K S P T
Section point number within the current layer.
K S T E P
Step number.
K I N C
Increment number.
Example: Using more than one user-defined mechanical material model
To use more than one user-defined mechanical material model, the variable C M N A M E can be tested for different material names inside user subroutine U M A T as illustrated below:
I F(C M N A M E(1:4).E Q.'M A T1')T H E N
C A L L U M A T_M A T1(argument_list)
E L S E I F(C M N A M E(1:4).E Q.'M A T2')T H E N
C A L L U M A T_M A T2(argument_list)
E N D I F
U M A T_M A T1 and U M A T_M A T2 are the actual user material subroutines containing the constitutive material models for each material M A T1 and M A T2, respectively. Subroutine U M A T merely acts as a directory here. The argument list may be the same as that used in subroutine U M A T.
Example: Simple linear viscoelastic material
As a simple example of the coding of user subroutine U M A T, consider the linear, viscoelastic model shown in Figure 1.1.41–1. Although this is not a very useful model for real materials, it serves to illustrate how to code the routine.
Figure 1.1.41–1 Simple linear viscoelastic model.
The behavior of the one-dimensional model shown in the figure is
where and are the time rates of change of stress and strain. This can be generalized for small straining of an isotropic solid as
and
where
and , , , , and are material constants ( and are the Lamé constants).
A simple, stable integration operator for this equation is the central difference operator:
where f is some function, is its value at the beginning of the increment, is the change in the function over the increment, and is the time increment.
Applying this to the rate constitutive equations above gives
and
so that the Jacobian matrix has the terms
and
The total change in specific energy in an increment for this material is
while the change in specific elastic strain energy is
where D is the elasticity matrix:
No state variables are needed for this material, so the allocation of space for them is not necessary. In a more
realistic case a set of parallel models of this type might be used, and the stress components in each model might be stored as state variables.
For our simple case a user material definition can be used to read in the five constants in the order , , , , and so that
The routine can then be coded as follows:
S U B R O U T I N E U M A T(S T R E S S,S T A T E V,D D S D D E,S S E,S P D,S C D,
1R P L,D D S D D T,D R P L D E,D R P L D T,
2S T R A N,D S T R A N,T I M E,D T I M E,T E M P,D T E M P,P R E D E F,D P R E D,C M N A M E,
3N D I,N S H R,N T E N S,N S T A T V,P R O P S,N P R O P S,C O O R D S,D R O T,P N E W D T,
4C E L E N T,D F G R D0,D F G R D1,N O E L,N P T,L A Y E R,K S P T,K S T E P,K I N C)
C
I N C L U D E'A B A_P A R A M.I N C'
C
C H A R A C T E R*80C M N A M E
D I M
E N S I O N S T R E S S(N T E N S),S T A T E V(N S T A T V),
1D D S D D E(N T E N S,N T E N S),
2D D S D D T(N T E N S),D R P L D E(N T E N S),
3S T R A N(N T E N S),D S T R A N(N T E N S),T I M E(2),P R E D E F(1),D P R E D(1),
4P R O P S(N P R O P S),C O O R D S(3),D R O T(3,3),D F G R D0(3,3),D F G R D1(3,3)
D I M
E N S I O N D S T R E S(6),D(3,3)
C
C E V A L U A T E N E W S T R E S S T E N S O R
C
E V=0.
D E V=0.
D O K1=1,N D I
E V=E V+S T R A N(K1)
D E V=D E V+D S T R A N(K1)
E N D D O
C
T E R M1=.5*D T I M E+P R O P S(5)
T E R M1I=1./T E R M1
T E R M2=(.5*D T I M E*P R O P S(1)+P R O P S(3))*T E R M1I*D E V
T E R M3=(D T I M E*P R O P S(2)+2.*P R O P S(4))*T E R M1I
C
D O K1=1,N D I
D S T R
E S(K1)=T E R M2+T E R M3*D S T R A N(K1)
1+D T I M E*T E R M1I*(P R O P S(1)*E V
2+2.*P R O P S(2)*S T R A N(K1)-S T R E S S(K1))
S T R E S S(K1)=S T R E S S(K1)+D S T R E S(K1)
E N D D O
C
T E R M2=(.5*D T I M E*P R O P S(2)+P R O P S(4))*T E R M1I
I1=N D I
D O K1=1,N S H R
I1=I1+1
D S T R
E S(I1)=T E R M2*D S T R A N(I1)+
1D T I M E*T E R M1I*(P R O P S(2)*S T R A N(I1)-S T R E S S(I1)) S T R E S S(I1)=S T R E S S(I1)+D S T R E S(I1)
E N D D O
C
C C R E A T E N E W J A C O B I A N
C
T E R M2=(D T I M E*(.5*P R O P S(1)+P R O P S(2))+P R O P S(3)+
12.*P R O P S(4))*T E R M1I
T E R M3=(.5*D T I M E*P R O P S(1)+P R O P S(3))*T E R M1I
D O K1=1,N T
E N S
D O K2=1,N T
E N S
D D S D D E(K2,K1)=0.
E N D D O
E N D D O
C
D O K1=1,N D I
D D S D D E(K1,K1)=T
E R M2
E N D D O
C
D O K1=2,N D I
N2=K1–1
D O K2=1,N2
D D S D D E(K2,K1)=T
E R M3
D D S D D E(K1,K2)=T
E R M3
E N D D O
E N D D O
T E R M2=(.5*D T I M E*P R O P S(2)+P R O P S(4))*T E R M1I
I1=N D I
D O K1=1,N S H R
I1=I1+1
D D S D D E(I1,I1)=T
E R M2
E N D D O
C
C T O T A L C H A N G E I N S P E C I F I C E N E R G Y
C
T D E=0.
D O K1=1,N T
E N S
T D E=T D E+(S T R E S S(K1)-.5*D S T R E S(K1))*D S T R A N(K1)
E N D D O
C
C C H A N G E I N S P E C I F I C E L A S T I C S T R A I N E N E R G Y
C
T E R M1=P R O P S(1)+2.*P R O P S(2)
D O K1=1,N D I
D(K1,K1)=T E R M1
E N D D O
D O K1=2,N D I
N2=K1-1
D O K2=1,N2
D(K1,K2)=P R O P S(1)
D(K2,K1)=P R O P S(1)
E N D D O
E N D D O
D E E=0.
D O K1=1,N D I
T E R M1=0.
T E R M2=0.
D O K2=1,N D I
T E R M1=T E R M1+D(K1,K2)*S T R A N(K2)
T E R M2=T E R M2+D(K1,K2)*D S T R A N(K2)
E N D D O
D E E=D E E+(T E R M1+.5*T E R M2)*D S T R A N(K1)
E N D D O
I1=N D I
D O K1=1,N S H R
I1=I1+1
D E E=D E E+P R O P S(2)*(S T R A N(I1)+.5*D S T R A N(I1))*D S T R A N(I1)
E N D D O
S S E=S S E+D E E
S C D=S C D+T D E– D E E
R E T U R N
E N D
abaqus安装说明
闲话不说，直接上链接 https://www.wendangku.net/doc/3010448723.html,/s/122MWa abaqus 6.13对操作系统的新要求： 自abaqus 6.13版本开始，将不再支持windows 的32位操作平台； 同时，也不再支持windows xp和 windows vista操作系统； 安装： 1. Run "Install Abagus Product & Licensing" 2. In SIMULIA FLEXnet License Server window select "Just install the license utilities" NOTE: If you already have SIMULIA FLEXnet License Server for ABAQUS 6.12-3 installed and running you can use it for 6.13-1 too 3. After finishing License Utilities setup copy files "ABAQUS.lic" and "ABAQUS.log" to
ABAQUS中Fortran子程序调用方法
第一种方法： / o/ J5 @6 U/ ^- o$ 1. 建立工作目录/ ]" 2. 将Abaqus安装目录\6.4-pr11\site下的aba_param_dp.inc或aba_param_sp.inc拷贝到工作目录，并改名为aba_param.inc； # ~/ |0 I0 E6 {, @4 X3 q: W3. 将编译的fortran程序拷贝到工作目录； 4. 将.obj文件拷贝到工作目录； 5. 建立好输入文件.inp； 6. 运行abaqusjob=inp_name user=fortran name即可。 第二种方法： 在Job模块里，创建工作，在EditJob对话框中选择General选项卡，在Usersubroutine file中点击Select 按钮，从弹出对话框中选择你要调用的子程序文件（后缀为.for或.f）。 , D8 i7 d/r c6 @" | 以下是网上摘录的资料，供参考：. |$ t/ }$W7 Y6 m4 h6 D6 j 用户进行二次开发时，要在命令行窗口执行下面的命令： 4 O. R+ ^,@( ? abaqus job=job_name user=sub_name ABAQUS会把用户的源程序编译成obj文件，然后临时生成一个静态库standardU.lib和动态库standardU.dll，还有其它一些临时文件，而它的主程序（如standard.exe和explicit.exe等）则没有任何改变，由此看来ABAQUS是通过加载上述2个库文件来实现对用户程序的连接，而一旦运行结束则删除所有的临时文件。这种运行机制与ANSYS、LS-DYNA、marc等都不同。 : j6 g' R-o( {0 [* N2 J3 X这些生成的临时文件要到文件夹C:\Documentsand Settings\Administrator\Local Settings\Temp\中才能找到，这也是6楼所说的藏了一些工作吧，大家不妨试一下。 1子程序格式(程序后缀是.f; .f90; .for;.obj??) 答：我试过，.for格是应该是不可以的，至少6.2和6.3版本应该是不行，其他的没用过，没有发言权。在Abaqus中，运行abaqusj=jobname user=username时，默认的用户子程序后缀名是.for（.f,.f90应该都不行的，手册上也有讲过），只有在username.for文件没有找到的情况下，才会去搜索username.obj，如果两者都没有，就会报错误信息。 如果username包括扩展名for或obj，那么就根据各自的扩展名ABAQUS会自动选择进行操作。 2CAE中如何调用？Command下如何调用？ 答：CAE中在creat job的jobmanager中的general中可以指定子程序； Command下用命令:abaqus j=jobnameuser=userfilename （无后缀）； 3若有多个子程序同时存在，如何处理 答：将其写在一个文件中即可，然后用一个总的子程序调用（具体参见手册） 4我对VF不是很熟，是否可以用VC，C＋＋编写子程序？ A: 若要在vf中调试，那么应该根据需要把SITE文件夹中的ABA_PARAM_DP.INC（双精度）或ABA_PARAM_SP.INC（单精度）拷到相应的位置，并改名为ABA_PARAM.INC即可。 据说6.4的将可以，6.3的你可以尝试着将VC，C＋＋程序编译为obj文件，没试过。在你的工作目录下应该已经存在ufield.obj和uvarm.obj这两个文件（这两个文件应该是你分别单独调试ufield.FOR和uvarm.FOR时自动编译生成的，你可以将他们删掉试试看），但是由于你的FOR文件中已经有了UV ARM 和UFIELD这两个subroutine，显然会造成重复定义，请查实。 用户子程序的使用 假设你的输入文件为：a.inp b.for 那么在ABAQUS Command 中的命令应该是这样的： abaqusjob=a user=b
超详细Abaqus安装教程
超详细A b a q u s安装教 程 Pleasure Group Office【T985AB-B866SYT-B182C-BS682T-STT18】
Abaqus2017 安装教程 将安装镜像加载至虚拟光驱 以管理员身份运行J:\1下的,保持默认点击下一步。 首先安装的是拓展产品文档，点击“下一步”，选择安装目标，并点击“下一步” 选择文档需要包含的部件，并点击“下一步” 提示程序安装信息足够，点击“安装” 提示SIMULIA 2017文档安装成功，点击“关闭”。 接着会自动弹出Abaqus Simulation Services,修改安装目标地址，并点击“下一步” 选择您需要的部件，并点击“下一步” 检测安装信息足够，点击“安装”， 提示安装成功够点击“关闭” 接来下会自动安装Abaqus Simulation Services CAA API，点击“下一步”， 选择您需要的安装的部件，点击下一步 安装完成后“关闭” 接下来是自动安装 Abaqus CAE 找到安装包里的_SolidSQUAD_文件夹，将里面的License文件复制到Abaqus安装目录里的SIMULIA文件夹里。然后打开License文件夹，改.lic许可证文件的计算机名，同时再新建一个.log日志文件。 粘贴到D:\SIMULIA 下 在License下新建一个文本文档，重命名为 用记事本打开 使用计算机名替换this_host 保存后退出。 以管理员方式打开，点击Config Services，按如下配置 点击Save Service。切换到Start/Stop/Reread选项卡，点击Stop Server，再点击Start Server。下面提示Server Start Successful则配置成功。关闭窗口。 回到Abaqus CAE的安装界面。 在License Server 1 中输入27011@DESKTOP-Q8CNNLR 注：DESKTOP- Q8CNNLR 是计算机的用户名。点击下一步。 点击下一步 修改目录，点击下一步 设置工作空间路径，建议选择较大的硬盘分区。点击“下一步” 信息确认无误开始安装。 点击Continue 提示Abaqus CAE安装完成，点击关闭。 下面是Tosca 2017的安装。根据需求选择安装。 根据需求选择接口 若安装按ANSA可选择路径，没有则直接下一步。 若没有安装Fluent ,取消勾选FLUENT 剩下步骤类似上面。最后点击安装。 最后是 Isight 2017的安装。步骤后之前相同，一直点下一步记忆可以了
abaqus复合材料
复合材料不只是几种材料的混合物。它具有普通材料所没有的一些特性。它在潮湿和高温环境，冲击，电化学腐蚀，雷电和电磁屏蔽环境中具有与普通材料不同的特性。 复合材料的结构形式包括层压板，三明治结构，微模型，编织预成型件等。 复合材料的结构和材料具有同一性，并且可以在结构形成时同时确定材料分布。它的性能与制造过程密切相关，但是制造过程很复杂。由于复合结构不同层的材料特性不同，复合结构在复杂载荷作用下的破坏模式和破坏准则是多种多样的。 在ABAQUS中，复合材料的分析方法如下 1，造型 它的结构形式决定了它的建模方法，并且可以使用基于连续体的壳单元和常规壳单元。复合材料被广泛使用，但是复合材料的建模是一个困难。铺设复杂的结构光需要一个月 2，材料
使用薄片类型（层材料）建立材料参数。材料参数可以工程参数的形式给出，或者材料强度数据可以通过子选项给出。这种材料仅使用平面应力问题。 ABAQUS可以通过两种方式定义层压板：复合截面定义和复合层压板定义 复合截面定义对每个区域使用相同的图层属性。这样，我们只需要建立壳体组合即可将截面属性分配给二维（在网格中定义的常规壳体元素）或三维（三维的大小应与壳体中给定的厚度一致）。基于网格中定义的连续体的壳单元） ABAQUS复合材料分析方法介绍 复合叠加定义是由复合布局管理器定义的，它主要用于在模型的不同区域中构造不同的层。因此，应在定义之前对区域进行划分，并且应将不同的层分配给不同的区域。可以根据常规外壳的元素和属性进行定义。 传统的壳单元定义了每个层的厚度，并将其分配给二维模型。应该给基于连续体的壳单元或实体单元提供3D模型（厚度是相对于单元长度的系数，因此厚度方向可以分为一层单元）。
ABAQUS子程序
Home 浅谈ABAQUS用户子程序 李青清华大学工程力学系 摘要本文首先概要介绍了ABAQUS的用户子程序和应用程序，然后从参数，功能两方面详细论述了DLOAD, UEXTERNALDB, URDFIL三个用户子程序和GETENVVAR，POSFIL，DBFILE三个应用程序，并详细介绍了ABAQUS的结果文件（.FIL）存储格式。 关键字ABAQUS，用户子程序，应用程序，结果文件 一、前言： ABAQUS为用户提供了强大而又灵活的用户子程序接口（USER SUBROUTINE）和应用程序接口(UTILITY ROUTINE)。ABAQUS 6.2.5一共有42个用户子程序接口，13个应用程序接口，用户可以定义包括边界条件、荷载条件、接触条件、材料特性以及利用用户子程序和其它应用软件进行数据交换等等。这些用户子程序接口使用户解决一些问题时有很大的灵活性，同时大大的扩充了ABAQUS的功能。例如：如果荷载条件是时间的函数，这在ABAQUS/CAE 和INPUT 文件中是难以实现的，但在用户子程序DLOAD中就很容易实现。 二．在ABAQUS中使用用户子程序 ABAQUS的用户子程序是根据ABAQUS提供的相应接口，按照FORTRAN语法用户自己编写的代码。在一个算例中，用户可以用到多个用户子程序，但必须把它们放在一个以.FOR为扩展名的文件中。运行带有用户子程序的算例时有两种方法，一是在CAE中运行，在EDIT JOB菜单的GENERAL子菜单的USER SUBROUTINE FILE对话框中选择用户子程序所在的文件即可；另外是在ABABQUS COMMAND用运行，语法如下： ABAQUS JOB=[JOB] USER?[.FOR]?C 用户在编写用户子程序时，要注意以下几点： 1．用户子程序不能嵌套。即任何用户子程序都不能调用任何其他用户子程
abaqus简单umat子程序
SUBROUTINE UMAT(STRESS,STATEV,DDSDDE,SSE,SPD,SCD,RPL,DDSDDT, 1 DRPLDE,DRPLDT,STRAN,DSTRAN,TIME,DTIME,TEMP,DTEMP,PREDEF,DPRED, 2 CMNAME,NDI,NSHR,NTENS,NSTATV,PROPS,NPROPS,COORDS,DROT, 3 PNEWDT,CELENT,DFGRD0,DFGRD1,NOEL,NPT,LAYER,KSPT,KSTEP,KINC) include 'aba_param.inc' CHARACTER*8 CMNAME DIMENSION STRESS(NTENS),STATEV(NSTATV),DDSDDE(NTENS,NTENS), 1 DDSDDT(NTENS),DRPLDE(NTENS),STRAN(NTENS),DSTRAN(NTENS), 2 TIME(2),PREDEF(1),DPRED(1),PROPS(NPROPS),COORDS(3),DROT(3,3), 3 DFGRD0(3,3),DFGRD1(3,3) C UMAT FOR ISOTROPIC ELASTICITY C CANNOT BE USE D FOR PLAN E STRESS C ---------------------------------------------------------------- C PROPS(1) - E C PROPS(2) - NU C ---------------------------------------------------------------- C IF (NDI.NE.3) THEN WRITE (*,*) 'THIS UMAT MAY ONLY BE USED FOR ELEMENTS 1 WITH THREE DIRECT STRESS COMPONENTS' CALL XIT ENDIF open(400,file='D:\test.txt') C ELASTIC PROPERTIES EMOD=PROPS(1) ENU=PROPS(2) EBULK3=EMOD/(1-2*ENU) EG2=EMOD/(1+ENU) EG=EG2/2 EG3=3*EG ELAM=(EBULK3-EG2)/3 write(400,*) 'temp=',temp C ELASTIC STIFFNESS C DO K1=1, NDI DO K2=1, NDI DDSDDE(K2, K1)=ELAM END DO DDSDDE(K1, K1)=EG2+ELAM
Abaqus常见的错误
Abaqus常见的错误和解决方法 Fixed time is too large Too many attamps have been made THE SOLUTION APPEARS TO BE DIVERGING. CONVERGENCE ISJUDGED UNLIKELY. Time increment required is less than the minimum specified 这样的信息几乎是无用信息（除了告诉你的模型分析失败以外，没有告诉你任何有用的东西）。宜再查找别的信息来考察。根据经验，改小增量步也不一定能收敛，虽然也有人报告过改好的先例，我是从来没有遇到过，也从来没有那个奢望。所以我一般从模型的设置入手。 必须说明的是：Error和warning的性质是完全不同的。Error意味着运算失败，but出现warning可能还能算，而且有些运算必定会出现warning（比如接触分析必定出“负特征值”，下有详述）。很多警告只是通知性质的，或者只是说明一下而已，不一定都是模型有问题。比如以下warning完全可以忽略： xxxxx will （not）printed，这种只是通知你一声，某些玩意儿不输出了。还有： The parameter frequency cannot be used with the parameter field. It will be ignored（都说某某被ignored了）. A系列 如果模型能算，且结果合理，那么大部分警告信息可以不管。但是以下除外： 1 numerical sigularity(数值奇异)：刚体位移（欠约束） solver problem. numerical sigularity when processing node105 instance pile D.O.F. 1 ratio=1.735e13 2 Zero pivot（零主元）：过约束或者欠约束。 这2个问题一般都意味着模型约束存在问题。1）、2）都会伴随着产生大量负特征值。解决方案当然第一步是检查约束了。 B系列 有一些直接导致计算aborted，那就得仔细分析了，比如： 1 xxxxx is not a valid in ABAQUS/Standard(告诉你这种计算standard不支持了，换别的) 2 missing property 在perperty步检查材料属性是不是都加上了。如果有梁单元，看看梁法向定义对了没有。 3 Detected lock file Job-1.lck. Please confirm that no other applications are attempting to write to the output database associated with this job before removing the lock file and resubmitting. 删除.lck文件就可以了，它是一个自动生成的文件。你也可以另存为（另取名），再运算。 4 The rigid part xx is missing a refernce point 刚体（or刚体约束）都必须通过stools--reference point给它定义一个参考点（RP），载荷都加在这个RP上。
abaqus安装方法详解
***防火墙英文存放位置及安装路径，系统组件…… 第一部分Abaqus的安装问题（不含子程序） 1）用虚拟光驱加载DVD2，安装Document，直接运行根目录下的setup.exe 即可，安装过程比较简单。 (完成1后不要急着安装啊！因为你需要做一些事情来使得你的电脑可以破解abaqus。做什么呢！需要做两项，分别是： 1.1.设置一个环境变量，变量名为：LM_LICENSE_FILE；变量值为：27011@127.0.0.1。 这个时候有人会问，这是咋回事啊！因该是27011@自己的电脑名称。 我要告诉你这个127.0.0.1就是指你的电脑。所以不用再写你的电脑名字了，要是万一你的电脑名字是汉语的，那么还不好使呢！ 这个步骤的目的在于在你的电脑里面建立了一个解码系统，可以明目张胆地使用abaqus。 1.2.修改abaqus安装盘中SHooTERS文件夹中的abaqus69.dat，打开它，将“this_host”修改为127.0.0.1。保存。) 根据个人安装经验，上述方法有时可能会失效，自己调整如下。 因为我下载的版本的license文件第一行为：SERVER THIS_host ID=20111111 27011 而不是SERVER THIS_host ID=20111111 27003 第4步：变量名LM_LICENSE_FILE，值为27011@hostname （hostname为你的计算机名字） 第8步：27003@hostname 更改为27011@hostname （hostname为你的计算机名字） 2）设置环境变量：鼠标右键点击桌面“我的电脑”图标，通过路径“属性->高级->环境变量”，然后在系统变量栏新建一个环境变量，变量名LM_LICENSE_FILE，值为27011@hostname。（以前版本的为27003等现为27011，hostname为你的计算机名） 3）用虚拟光驱加载DVD1，先安装License，运行 X:\win86_32\license\Windows\Disk1\InstData\VM\install.exe。安装过程中可能需要输入你的计算机名，一般上一步环境变量设置好了就不用输入了，安装时选择“just install the licenseing utilities”。注意：如果你的计算机上还装有abaqus 的其他版本，6.10版本的license可能会与低版本的发生冲突，导致无法安装第7步的product，所以需要把其他版本的license停掉，这样就可以了；我是讲6.8完全卸载之后再安装的6.10。 (中间选择Abaqus web server，很快安装好后，最后得画面会出现一个URL，例如http:// hostname:2080/v6.9/。需要拷贝一下，或者抄写下来。)
ABAQUS 2017 2018汉化教程
ABAQUS 2017 2018第一次安装后软件不能启动解决办法！ 1.打开安装盘对应的以下路径：E:\Program Files\Dassault Systemes\SimulationServices\V6R2017x\win_b64\SMA\site（软件安装在什么盘下，路径中的E更改为对应的盘符）。 2.在Site文件夹下找到custom_v6.env文件，鼠标右键点击，打开方式选择写字板（修 改custom_v6.env文件前建议先复制一份备份）。 3.将打开的custom_v6.env文件中带色的部分删除并保存。（若修改后不能保存，可 将custom_v6.env文件复制到桌面进行修改保存，然后复制并覆盖E:\Program 下的源文件） 4.双击ABAQUS 2017图标，软件已正常运行。
ABAQUS 2017 2018汉化教程！ 1.打开安装盘对应的以下路径：E:\SIMULIA\CAE\2017\win_b64\SMA\Configuration（软 件安装在什么盘下，路径中的E更改为对应的盘符）。 2.在Configuration文件夹下找到locale.txt文件，将locale.txt文件复制到桌面，鼠标右 键点击，打开方式选择写字板（修改locale.txt文件前建议先复制一份备份）。 3.在“Chinese_People's Republic of China.936 = zh_CN Chinese (Simplified)_People's Republic of China.936 = zh_CN”下方插入一行Chinese (Simplified)_China.936 = zh_CN 如下图：
《ABAQUS 元分析常见问题解答》常见问题汇总
第1章关于 Abaqus 基本知识的常见问题第一篇基础篇
第1章关于 Abaqus 基本知识的常见问题 第1章关于 Abaqus 基本知识的常见问题 1.1 Abaqus 的基本约定 1.1.1 自由度的定义 【常见问题1-1】 Abaqus 中的自由度是如何定义的？ 1.1.2 选取各个量的单位 【常见问题1-2】 在 Abaqus 中建模时，各个量的单位应该如何选取？ 1.1.3 Abaqus 中的时间 【常见问题1-3】 怎样理解 Abaqus 中的时间概念？
第1章关于 Abaqus 基本知识的常见问题 1.1.4 Abaqus 中的重要物理常数 【常见问题1-4】 Abaqus 中有哪些常用的物理常数？ 1.1.5 Abaqus 中的坐标系 【常见问题1-5】 如何在 Abaqus 中定义局部坐标系？ 1.2 Abaqus 中的文件类型及功能 【常见问题1-6】 Abaqus 建模和分析过程中会生成多种类型的文件，它们各自有什么作用？ 【常见问题1-7】 提交分析后，应该查看 Abaqus 所生成的哪些文件？ 1.3 Abaqus 的帮助文档 1.3.1 在帮助文档中查找信息 【常见问题1-8】 如何打开 Abaqus 帮助文档？
第1章关于 Abaqus 基本知识的常见问题 【常见问题1-9】 Abaqus 帮助文档的内容非常丰富，如何在其中快速准确地找到所需要的信息？ 1.3.2 在 Abaqus/CAE 中使用帮助 【常见问题1-10】 Abaqus/CAE 的操作界面上有哪些实时帮助功能？ 【常见问题1-11】 Abaqus/CAE 的 Help 菜单提供了哪些帮助功能？ 1.4 更改工作路径 【常见问题1-12】 Abaqus 读写各种文件的默认工作路径是什么？如何修改此工作路径？ 1.5 Abaqus 的常用 DOS 命令 【常见问题1-13】 Abaqus 有哪些常用的 DOS 命令？
ABAQUS用户子程序
当用到某个用户子程序时，用户所关心的主要有两方面：一是ABAQUS提供的用户子程序的接口参数。有些参数是ABAQUS传到用户子程序中的，例如SUBROUTINE DLOAD中的KSTEP，KINC，COORDS；有些是需要用户自己定义的，例如F。二是ABAQUS何时调用该用户子程序，对于不同的用户子程序ABAQUS调用的时间是不同的。有些是在每个STEP的开始，有的是STEP结尾，有的是在每个INCREMENT的开始等等。当ABAQUS 调用用户子程序是，都会把当前的STEP和INCREMENT利用用户子程序的两个实参KSTEP和KINC传给用户子程序，用户可编个小程序把它们输出到外部文件中，这样对ABAQUS何时调用该用户子程序就会有更深的了解。 （子程序中很重要的就是要知道由abaqus提供的那些参量的意义，如下） 首先介绍几个子程序： 一．SUBROUTINE DLOAD(F,KSTEP,KINC,TIME,NOEL,NPT,LAYER,KSPT,COORDS, JLTYP,SNAME) 参数： 1．F为用户定义的是每个积分点所作用的荷载的大小； 2．KSTEP,KINC为ABAQUS传到用户子程序当前的STEP和INCREMENT值；3．TIME(1),TIME(2)为当前STEP TIME和INCREMENT TIME的值；4．NOEL,NPT为积分点所在单元的编号和积分点的编号； 5．COORDS为当前积分点的坐标； 6．除F外，所有参数的值都是ABAQUS传到用户子程序中的。 功能： 1．荷载可以被定义为积分点坐标、时间、单元编号和单元节点编号的函数。 2．用户可以从其他程序的结果文件中进行相关操作来定义积分点F的大小。 例1：这个例子在每个积分点施加的荷载不仅是坐标的函数，而且是随STEP变化而变化的。SUBROUTINE DLOAD(P,KSTEP,KINC,TIME,NOEL,NPT,LAYER,KSPT,COORDS, 1 JLTYP,SNAME) INCLUDE 'ABA_PARAM.INC' C DIMENSION TIME(2),COORDS(3) CHARACTER*80 SNAME PARAMETER (PLOAD=100.E4) IF (KSTEP.EQ.1) THEN ！当STEP=1时的荷载大小 P=PLOAD ELSE IF (KSTEP.EQ.2) THEN ！当STEP＝2时的荷载大小 P=COORDS(1)*PLOAD ！施加在积分点的荷载P是坐标的函数 ELSE IF (KSTEP.EQ.3) THEN ！当STEP=3时的荷载大小 P=COORDS(1)**2*PLOAD ELSE IF (KSTEP.EQ.4) THEN ！当STEP=4时的荷载大小 P=COORDS(1)**3*PLOAD ELSE IF (KSTEP.EQ.5) THEN ！当STEP=5时的荷载大小 P=COORDS(1)**4*PLOAD END IF RETURN END UMAT 子程序具有强大的功能，使用UMAT 子程序： (1) 可以定义材料的本构关系，使用ABAQUS 材料库中没有包含的材料进行计算，扩
橡胶材料在ABAQUS的材料参数设定
橡膠材料在ABAQUS中使用 之設定 Alvin Chen
Outline Elastic Behavior Compressibility (Hyperelasticity) Strain energy potentials (Hyperelasticity) Example
Linear elasticity →Small elastic strains (normally less then 5%) →Isotropic, orthotropic, or fully anisotropic →Can have property depend on temperature and/or other field variables Hypoealsticity →Small elastic strains-the stresses should not be large compared to the elastic modulus of the material →Load path is monotonic →If temperature is to be included “UHYPEL” Hyperfoam →Isotropic and nonlinear, energy dissipation and stress softening effects →Cellular solids whose porosity permits very large volumetric changes →Deform elastically to large strains, up to 90% strain in compression →Requires geometric nonlinearity be accounted in analysis step
ABAQUS安装及汉化方法
统：Windows 7（32位系统）ABAQUS版本：6.9.3（DVD1为安装文件2.4G，DVD2为帮助文件1.8G）准备工作：1.由于安装文件为DVD格式，可下载并安装软件daemon_tools （DTLite4356-0091），直接打开DVD1,2 2.将License.dat用记事本打开，this_host改为本机系统：Windows 7（32位系统） 准备工作： 1.由于安装文件为DVD格式，可下载并安装软件daemon_tools （DTLite4356-0091），直接打开DVD1,2 2.将License.dat用记事本打开，this_host改为本机计算名（计算机属性，在“计算机名称、域或工作组设置”一栏找到“计算机全名”），27007不用改动 3.安装Microsoft Visual C++支持： 运行DVD1\win86_32\ 注：64位的机器请运行F:\ABAQUS6.9\win86_64文件夹下相应程序。 如果Microsoft Visual C++没有提前安装的话后边License会给以提示。 安装流程： 第一步：安装License 运行DVD1\ setup.exe \ （重要步骤）【右击install.exe—属性--兼容性—勾选“以兼容模式运行这个程序”—选择windows XP (service Pack 3)】。 选择License，一路Next直到出现需要输入HOSTNAME时，输入计算机全名，若已自动输入则Next，接着选择授权文件的安装类型，此处选择Just install the licensing utilities。 然后当有选择安装路径时自己选择想要的安装路径，然后Next直至完成。 安装完后将准备工作共的License.dat文件复制到安装盘（假定为C盘）C:\SIMULIA\License 目录。运行license utilities, 在config service中，service name: abaqus flexlm license server; 在“Path to the lmgrd.exe file”一栏中，选择指向“C:\SIMULIA\License\lmgrd.exe”在“Path to the license file”一栏中，选择指向“C:\SIMULIA\License\ABAQUS68_SUMMEREDITION.DA T”（第一步更改后的dat文件）在“Path to the debug log file”一栏中，选择指向“abaqus.log”（abaqus.log文件可以自己创建）Save service, 再start license。注意左下角出现start service successful. 第二步：安装product 兼容模式运行\ABAQUS6.9\win86_32\product\Windows\Disk1\InstData\VM\install.exe也可以在第一步的基础上选择product。 在需要输入Lisence server 1（REQUIRED）时，输入（27007@hostname），Server 2和Server 3可以不输入。 Next直至安装完成。 启动Abaqus CAE，先后看到命令提示符窗口和图形界面窗口，至此安装成功。 第三步：安装帮助文档 运行DVD2\ setup.exe \根据提示操作，在提示输入hostname/IP address时输入完整的计算机名称 然后当有选择安装路径时自己选择想要的安装路径，然后Next直至完成。 安装时license是关键，计算机名也很重要。 原文作者：houniao（转帖请注明作者）
Abaqus材料用户子程序UMAT基础知识与手册例子完整解释
1、为何需要使用用户材料子程序（User-Defined Material, UMAT ）？ 很简单，当ABAQUS 没有提供我们需要的材料模型时。所以，在决定自己定义一种新的材料模型之前，最好对ABAQUS 已经提供的模型心中有数，并且尽量使用现有的模型，因为这些模型已经经过详细的验证，并被广泛接受。 UMAT 子程序具有强大的功能，使用UMAT 子程序： (1)可以定义材料的本构关系，使用ABAQUS 材料库中没有包含的材料进行计算，扩充程序功能。 (2) 几乎可以用于力学行为分析的任何分析过程，几乎可以把用户材料属性赋予ABAQU S 中的任何单元。 (3) 必须在UMAT 中提供材料本构模型的雅可比（Jacobian ）矩阵，即应力增量对应变增量的变化率。 (4) 可以和用户子程序“USDFLD ”联合使用，通过“USDFLD ”重新定义单元每一物质点上传递到UMAT 中场变量的数值。 2、需要哪些基础知识？ 先看一下ABAQUS 手册（ABAQUS Analysis User's Manual ）里的一段话： Warning: The use of this option generally requires considerable expertise(一定的专业知识). The user is cautioned that the implementation （实现） of any realistic constitutive （基本） model requires extensive （广泛的） development and testing. Initial testing on a single eleme nt model with prescribed traction loading （指定拉伸载荷） is strongly recommended. 但这并不意味着非力学专业，或者力学基础知识不很丰富者就只能望洋兴叹，因为我们的任务不是开发一套完整的有限元软件，而只是提供一个描述材料力学性能的本构方程（Constitutive equation ）而已。当然，最基本的一些概念和知识还是要具备的，比如： 应力(stress),应变（strain ）及其分量； volumetric part 和deviatoric part ；模量（modul us ）、泊松比(Poisson’s ratio)、拉梅常数(Lame constant)；矩阵的加减乘除甚至求逆；还有一些高等数学知识如积分、微分等。 3、UMAT 的基本任务？ 我们知道，有限元计算（增量方法）的基本问题是： 已知第n 步的结果（应力，应变等）n σ，n ε，然后给出一个应变增量1+n d ε，计算新的应力1+n σ。UMAT 要完成这一计算，并要计算Jacobian 矩阵DDSDDE(I,J) =εσΔ?Δ?/。σΔ是应力增量矩阵（张量或许更合适），εΔ是应变增量矩阵。DDSDDE(I,J) 定义了第J 个应变分量的微小变化对
Abaqus安装教程及汉化中英转换图文教程
ABAQUS安装及汉化过程 安装环境：win764位旗舰版。Abaqus-6.13.1-Win64-SSQ安装，在这之前保证自己的电脑名为英文。本文介绍安装步骤及汉化过程。排版技术有限，见谅。 一，安装步骤。 1.点击setup.exe进入安装程序。 2.点击next。 3.点击continue。
4.点击next。 5.不用勾选，直接点击next。 6.现在会自动生成主机名称，记住你的主机名，待会要用。（如果你的电脑是中文名，则生成的主机名会乱码，那么安装则会失败）。
. 7.选择第二个选项，点击next。 8.选择安装位置。同样确保为英文名称。 9.注意，现在先不要点击next。我们来破解软件。
10.打开ABAQUS_6.13.1_Win64_SSQ\_Crack_目录下ABAQUS.lic，用记事本打开。修改此处计算机名为自己的计算机名，我的是PC。 11.把这修改好的文件.lic和.Log复制到安装目录D:\ABAQUS\License下。
12.打开此文件夹下imtool.exe,进行设置。 点击config services，选择安装目录下的lmgrd.exe abaqus.lic abaqus.log文件如图所示，点击save service保存设置。
点击start server，确保下方提示successful。现在可以关闭lomtools了。 13.新建系统变量，右键点击计算机，点击属性，进入高级系统设置。高级栏下点击环境变量。 在系统变量中添加如下变量。 14.继续安装，点击next。
abaqus的材料参数
Department of Engineering University of Cambridge > Engineering Department > computing help ABAQUS Materials Input 1. 5. ABAQUS - Materials 2. Q5.1 : How do I find what material properties are needed for a particular analysis ? Read the relevant section in Chapter 6 : Analysis Procedures (User's manual Vol. I). This gives an overview about the analysis and has more information about the material properties. Read also the following sections in Chapter 17 : Materials Introduction of the ABAQUS User's manual. ?Section 17.1.1 - Material Library : Overview ?Section 17.1.2 - Material Data Definition ?Section 17.1.3 - Combining Material Properties Section 17.1.3 lists the material model combination tables. Several models are available to define the mechanical behaviour (elastic, plastic). Some material options require the presence of other material options. Some exclude the use of the other material options. For example *DEFORMATION PLASTICITY completely defines the material's mechanical behaviour and should not be used with *ELASTIC. Once you have all the relevant keywords to define the material properties consult the keyword Manual for each of the keywords. This will explain what data is required for each of the keyword. 3. Q5.2 : What material properties need to be specified in a thermal-electrical analysis ?
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