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Modifiy failure criteria of cohesive element in ABAQUS

Tue, 2009-11-03 15:50 - Chris Yang

Hi,

 I am just going to modify the existing failure criteria of cohesive element in ABA or even write new ones. I am wondering if it will be via UMAT or UEL, or other subroutines. Many thanks!

Chris

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Not converged for modelling crack propagation

Mon, 2008-09-15 20:19 - Chris Yang
research

Hello! I am modelling crack propagation in concrete specimen under direct tension by using cohesive element in ABAQUS as the interface where crack will propagate. By setting up the proper values of the parameters, I could model the exact behavior prior to the cracking, however, when changing some parameters to get the interface cracked, the model committed to be diversed. I have tried some little skills like viscosity and energy disspation fraction, but it was still not working.

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application of cohesive element to concrete cracks in Abaqus

Thu, 2008-06-05 14:13 - Chris Yang

Hi everybody!

I am now using Abaqus to model concrete cracks by using cohesive element and I have got two questions regarding this:

1. cohesive element, as known, is often employed to model interface especially when the integrity and strength of the interface is of interest. For my problem, there is no real interface, however, I impose a cohesive element interface artificially in the concrete and to see the crack propagation. Is this applicable theoretically?

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