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INITIAL_PLASTIC_STRAIN_FUNCTION

Initial conditions
*INITIAL_PLASTIC_STRAIN_FUNCTION
coid, entype, enid, fid, multi
Parameter definition
VariableDescription
coid Command ID
entype Entity type
options: P, PS, G, ALL
enid Entity ID
fid ID of FUNCTION defining the effective plastic strain as function of $(x,y,z)$
multi Treatment of multiple commands
options:
0 $\rightarrow$ plastic strains from previous commands are overwritten
1 $\rightarrow$ plastic strains from multiple commands are superposed
Description

This command is used to prescribe or add initial plastic strains to elements.

Example
Multiple initial plastic strains

Two bars are given initial plastic strains. The plastic strains are assigned with two linearly increasing functions along their lengths. The first function goes from 0 to 0.05 and the second function goes from 0 to 0.10.

The option multi is set to 0 (plastic strains from previous commands are overwritten) for bar 1 and set to 1 (plastic strains from multiple commands are superposed) for bar 2.



*UNIT_SYSTEM
SI
*PARAMETER
%L = 1.0, "Length of bar"
%T = 0.05, "Thickness of bar"
%epsp = 0.05, "First applied plastic strain"
%epsp_2 = 0.1, "Second applied plastic strain"
%tend = 0.001, "Termination time"
#
# --- TIME and OUTPUT ---
#
*TIME
[%tend]
*OUTPUT
[%tend]
#
# --- MESH ---
#
*COMPONENT_BOX
1, 1, 50, 1, 1
0, [-%T/2], [-%T/2], [%L], [%T/2], [%T/2]
*COMPONENT_BOX
2, 2, 50, 1, 1
0, [2*%T+%T/2], [-%T/2], [%L], [%T+%T/2], [%T/2]
*CHANGE_P-ORDER
ALL, 0, 3
*MAT_METAL
1, 7800, 210e9, 0.3
1
*FUNCTION
1
100e6
*PART
1, 1
2, 1
#
# --- FIRST INITIAL CONDITIONS ---
#
*INITIAL_PLASTIC_STRAIN_FUNCTION
1, P, 1, 101, 0
*INITIAL_PLASTIC_STRAIN_FUNCTION
2, P, 2, 101, 0
*FUNCTION
101
%epsp*(X/%L)
#
# --- SECOND INITIAL CONDITIONS ---
#
*INITIAL_PLASTIC_STRAIN_FUNCTION
3, P, 1, 102, 0
*INITIAL_PLASTIC_STRAIN_FUNCTION
4, P, 2, 102, 1
*FUNCTION
102
%epsp_2*(X/%L)
*END