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Solver settings in Abaqus/S for delamination analysis with cohesive elements

Submitted by BrianBak on
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Computational Mechanics Forum
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delamination
Abaqus/Standard
Cohesive elements
RIKS solver
Newton solver
Arc-length solver
solver settings

Hi 

 

I have different 3D models of laminates where I analyse the delamination propagation using zero thickness cohesive elements in Abaqus/Standard. My experience with the RIKS solver and Newton solvers are that they are extremely sensitive to even small changes in the step size settings as well as other solver settings. 

CONTACT in ABAQUS: HARD and SOFT contact techniques

Submitted by Mubeen on
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Contact Mechanics Forum
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contact analysis
Abaqus/Standard
Pressure-Overclosure relations
Constraint enforcement methods

Hello,

I am using Abaqus for nonlinear FEA of contact between material1 (soft foam like) and material2 (hard plastic type) in vertebrae for my thesis. I have encountered many problems during this exercise, because I have to include the results of various contact conditions in this situation with friction. I am trying to get results for 

  •  Hard contact (using penalty constraint enforcement)
  •  Soft contact (using linear and exponential Pressure-Overclosure relations)

The major problem is convergence during both analyses.

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