Abaqus用户子程序VUMAT.pdf

节选段落一：
VUMAT
1.2.17 VUMAT: User subroutine to define material behavior.
Product: Abaqus/Explicit
WARNING: The use of this user subroutine generally requires considerable
expertise. You are cautioned that the implementation of any realistic constitutive
model requires extensive development and testing.


节选段落二：
Objective stress rates
The Green-Naghdi stress rate is used when the mechanical behavior of the material is defined using user
subroutine VUMAT. The stress rate obtained with user subroutine VUMAT may differ from that obtained
with a built-in Abaqus material model.


节选段落三：
Abaqus/Explicit will automatically set the stresses, stretches, and state to a value of zero during the
annealing process.
1.2.17–6
Abaqus ID:
Printed on:
VUMAT
stepTime
Value of time since the step began.
totalTime
Value of total time.