*VOID NUCLEATION
21.6 *VOID NUCLEATION: Definethe nucleation of voids in a porous material.
This option is used to model the nucleation of voids in a porous material. It can be used only with the
*POROUS METAL PLASTICITY option.
Products: ABAQUS/Standard ABAQUS/Explicit
Type: Model data
Level: Model
References:
•“Porous metal plasticity,”Section 18.2.9 of the ABAQUS Analysis User’s Manual
•*POROUS METAL PLASTICITY
Optional parameter:
DEPENDENCIES
Set this parameter equal to the number of field variable dependencies, in addition totem perature,
that define the normal distribution of the nucleation strain. Ifthis parameter is omitted, the consta nts
defining the normal distribution may depend only on temperature. See “Specifying field variable
dependence”in “Material data definition,” Section 16.1.2 of the ABAQUS Analysis User’s Manual,
for more information.
Data lines to define void nucleation:
First line:
1. , mean value of the nucleation-strain normal distribution.
2. , standard deviation of the nucleation-strain normal distribution.
3. , volume fraction of nucleating voids.
4. Temperature.
5. Firstfield variable.
6. Second field variable.
7. Etc., up to four field variables.
Subsequent lines (only needed if the DEPENDENCIES parameter has a value greater thanfour):
1. Fifthfield variable.
2. Etc.,up to eight field variables per line.
Repeat this set of data lines as often as necessary to define the dependence of ,, and on
temperature and other predefined field variables.
21.6–1
ABAQUS Version 6.1 Module: ID:
Printed on: