3.13.13 Transferring results with damage

Abaqus Verification Guide

3.13.13 Transferring results with damage

Products: Abaqus/Standard Abaqus/Explicit

Elements tested

C3D8R CPS4R S4R

Problem description

The verification tests in this section consist of one-element models that are subjected to monotonically increasing tensile loads in sequential import analyses. Two sequences of tests are performed. The first sequence involves transferring results from Abaqus/Explicit to Abaqus/Standard and then again to Abaqus/Standard; the second involves transferring results from Abaqus/Standard to Abaqus/Explicit only. In the analyses an elastic-plastic material with Mises yield criterion is used in conjunction with ductile, shear, FLD, FLSD, and MSFLD damage initiation criteria and displacement or energy-based damage evolution laws.

The following material properties are used (the units are not important):

Material 1:

Elasticity

Young's modulus, E = 2.0 × 10¹¹

Poisson's ratio, = 0.33

Density

= 2000.0

Plasticity (isotropic hardening)

Yield stress	Plastic strain
2.0 × 10⁸	0.0
6.0 × 10⁸	2.0

Ductile damage initiation properties

Equivalent plastic strain at damage initiation	Stress triaxiality
1.8	–0.5
1.5	–0.1
1.0	0.0
0.90	0.1
0.80	0.3
0.50	0.6
0.30	1.0

Material 2:

Elasticity

Young's modulus, E = 2.0 × 10¹¹

Poisson's ratio, = 0.33

Density

= 2000.0

Plasticity (isotropic hardening)

Yield stress	Plastic strain
2.0 × 10⁸	0.0
6.0 × 10⁸	2.0

Ductile damage initiation properties

Equivalent plastic strain at damage initiation	Shear stress ratio	Strain rate
0.6	–10.	0.001
0.6	1.4	0.001
1.0	1.8	0.001
1.6	2.0	0.001
2.3	2.5	0.001
2.4	10.	0.001

Material 3:

Elasticity

Young's modulus, E = 2.0 × 10¹¹

Poisson's ratio, = 0.33

Density

= 2000.0

Plasticity (isotropic hardening)

Yield stress	Plastic strain
2.0 × 10⁸	0.0
4.0 × 10⁸	2.0

FLD damage initiation properties

Major principal strain	Minor principal strain
0.30	–0.2
0.20	–0.1
0.15	0.0
0.25	0.1
0.40	0.2

Material 4:

Elasticity

Young's modulus, E = 2.0 × 10¹¹

Poisson's ratio, = 0.33

Density

= 2000.0

Plasticity (isotropic hardening)

Yield stress	Plastic strain
2.0 × 10⁸	0.0
4.0 × 10⁸	2.0

FLSD damage initiation properties

Major principal strain	Minor principal strain
3.0 × 10⁸	2.0 × 10⁸
3.5 × 10⁸	3.0 × 10⁸
4.0 × 10⁸	3.5 × 10⁸
4.2 × 10⁸	4.0 × 10⁸

Material 5:

Elasticity

Young's modulus, E = 2.0 × 10¹¹

Poisson's ratio, = 0.33

Density

= 2000.0

Plasticity (isotropic hardening)

Yield stress	Plastic strain
3.0 × 10⁸	0.0
4.0 × 10⁸	2.0

MSFLD damage initiation properties

Major principal strain	Minor principal strain
0.30	–0.2
0.15	0.0
0.20	0.1
0.25	0.2
0.30	0.4
0.40	0.6
0.60	0.7

Material 6:

Damage evolution properties for the evolution law based on equivalent plastic displacement with linear softening

Effective plasticdisplacement at failure
1.0

All other material parameters are identical to those specified for Material 1.

Material 7:

Damage evolution properties for the evolution law based on equivalent plastic displacement with tabular softening

Damage variable	Effective plasticdisplacement at failure
0.0	0.0
1.0	1.0

All other material parameters are identical to those specified for Material 1.

Material 8:

Damage evolution properties for the evolution law based on equivalent plastic displacement with exponential softening

Effective plasticdisplacement at failure	Exponential lawparameter
0.25	1.0

All other material parameters are identical to those specified for Material 1.

Material 9:

Damage evolution properties for the evolution law based on energy dissipation with linear softening

Fracture energy
4.0 × 10⁸

All other material parameters are identical to those specified for Material 1.

Material 10:

Damage evolution properties for the evolution law based on energy dissipation with exponential softening

Fracture energy
1.0 × 10⁸

All other material parameters are identical to those specified for Material 1.

Results and discussion

The results demonstrate that the plasticity material model with a damage initiation criterion and a damage evolution law is transferred successfully between Abaqus/Explicit and Abaqus/Standard.

Input files

Ductile damage initiation (Material 1):

xs_x_ductile.inp

First Abaqus/Explicit analysis.

xs_s_ductile.inp

Abaqus/Standard analysis.

ss_s_ductile.inp

Second Abaqus/Standard analysis.

sx_s_ductile.inp

Base problem for Abaqus/Standard to Abaqus/Explicit import.

sx_x_ductile.inp

Abaqus/Explicit analysis, imported from sx_s_ductile.inp.

Shear damage initiation (Material 2):

First Abaqus/Explicit analysis.

Abaqus/Standard analysis.

Second Abaqus/Standard analysis.

Base problem for Abaqus/Standard to Abaqus/Explicit import.

Abaqus/Explicit analysis, imported from sx_s_shear.inp.

FLD damage initiation (Material 3):

First Abaqus/Explicit analysis.

Abaqus/Standard analysis.

Second Abaqus/Standard analysis.

Base problem for Abaqus/Standard to Abaqus/Explicit import.

Abaqus/Explicit analysis, imported from sx_s_fld.inp.

FLSD damage initiation (Material 4):

First Abaqus/Explicit analysis.

Abaqus/Standard analysis.

Second Abaqus/Standard analysis.

Base problem for Abaqus/Standard to Abaqus/Explicit import.

Abaqus/Explicit analysis, imported from sx_s_flsd.inp.

MSFLD damage initiation (Material 5):

First Abaqus/Explicit analysis.

Abaqus/Standard analysis.

Second Abaqus/Standard analysis.

Base problem for Abaqus/Standard to Abaqus/Explicit import.

Abaqus/Explicit analysis, imported from sx_s_msfld.inp.

Damage evolution based on equivalent plastic displacement with linear softening (Material 6):

xs_x_ductile_displin.inp

First Abaqus/Explicit analysis.

xs_s_ductile_displin.inp

Abaqus/Standard analysis.

Damage evolution based on equivalent plastic displacement with tabular softening (Material 7):

xs_x_ductile_disptab.inp

First Abaqus/Explicit analysis.

xs_s_ductile_disptab.inp

Abaqus/Standard analysis.

Damage evolution based on equivalent plastic displacement with exponential softening (Material 8):

sx_s_ductile_dispexp.inp

First Abaqus/Standard analysis.

sx_x_ductile_dispexp.inp

Abaqus/Explicit analysis.

xs_s_ductile_dispexp.inp

Second Abaqus/Standard analysis.

Damage evolution based on energy dissipated during the damage process with linear softening (Material 9):

sx_s_ductile_enerlin.inp

First Abaqus/Standard analysis.

sx_x_ductile_enerlin.inp

Abaqus/Explicit analysis.

xs_s_ductile_enerlin.inp

Second Abaqus/Standard analysis.

Damage evolution based on energy dissipated during the damage process with exponential softening (Material 10):

xs_x_ductile_enerexp.inp

First Abaqus/Explicit analysis.

xs_s_ductile_enerexp.inp

Abaqus/Standard analysis.