ABAQUS Volume II: I–Z - Manual (Page 615)

*VOID NUCLEATION
21.6 *VOID NUCLEATION: Define the 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 to temperature,
that define the normal distribution of the nucleation strain. If this parameter is omitted, the constants
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. First field variable.
6. Second field variable.
7. Etc., up to four field variables.
Subsequent lines (only needed if the DEPENDENCIES parameter has a value greater than four):
1. Fifth field 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:
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