![]() selection of approperiate material model for the material, and identify or obtain the corresponding material parameters (most likely from experiments or literature search). construction of an optimized finite element model with proper assumptions of loading, boundary, symmetry, etc conditions and size, type of elements. You might know already about them but as starting point, basic ingredients of the cracking behaviour would be: Nature does not care whether you can describe a phenomenon by an equation. Breath taking and sometimes frustrating, i would say.:) I still remember those days when i was using cohesive model in simulating interface fracture. ![]() Mesh-independent discrete numerical representations of cohesive-zone models , Engineering Fracture Mechanics, Volume 73, Issue 2, January 2006, Pages 160-177 To remove mesh bias and predict a crack path with cohesive zone model, following reference may be of interest to people using cohesive models and stuck due to mesh bias. Simulation of cup–cone fracture using the cohesive model Engineering Fracture Mechanics, Volume 70, Issue 14, September 2003, Pages 1943-1961 ![]() One way of removing the mesh bias is to use cohesive elements everywhere but it is a tedious job and many problems regarding stability and convergence.:) Cohesive zone modelling always have some disadvantages as discussed by Yanfei and others.
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