3D Connexion Version 6.6 manual

*USER MATERIAL
20.6 *USER MATERIAL: Definematerial constants for use in subroutine UMAT,UMATHT,or
VUMAT.
This option is used to input material constants for use in a user-definedm echanicalm odel(user subroutine
UMAT in ABAQUS/Standard or user subroutine VUMAT in ABAQUS/Explicit). In ABAQUS/Standard it
is also used to input material constants for use in a user-defined thermal material model (user subroutine
UMATHT).
Products: ABAQUS/Standard ABAQUS/Explicit
Type: Model data
Level: Model
References:
•“User-defined mechanical material behavior,”Section 20.8.1 of the ABAQUS Analysis User’s Manual
•“User-defined thermal material behavior,” Section 20.8.2 of the ABAQUS Analy sis User’s Manual
•“UMAT,”Section 1.1.31 of the ABAQUS User Subroutines Reference Manual
•“UMATHT,”Section 1.1.32 of the ABAQUS User Subroutines Reference Manual
•“VUMAT,”Section 1.2.4 of the ABAQUS User Subroutines Reference Manual
Required parameter:
CONSTANTS
Set this parameter equal to the number of constants beingentered.
Optional parameters:
TYPE
This parameter applies only to ABAQUS/Standard analys es.
Set TYPE=MECHANICAL (default) if the constants are used in defining the mechanical
behavior of the material.
Set TYPE=THERMAL if the constants are used in defining the thermal constitutive behav ior
of the material.
If both the user-defined mechanical and the user-definedtherm al behaviorof the material are
being modeled, the *USER MATERIALoption should be repeated in the material data block such
that each value of the TYPE parameter is used.
UNSYMM
This parameter applies only to ABAQUS/Standard analys es.
20.6–1
ABAQUS Version 6.1 Module: ID:
Printed on: