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Cohesive zone method(czm)

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Dear all,

I want to define cohesive surface in my model which is a polycrystalline of Titanium with its grains. Can anyone help me that How I should find the appropriate values for fracture energy and mode mix ratio 1 and 2?

For damage initiation, what do I consider for normal, shear 1 and shear 2 in contact property of interaction module? Are Tensile and shear strength suitable for these properties?

Thank you

Liming Jiang's picture

how to set the absolute contact stiffness when considering cohesive zone material (CZM)property

I'm simulating the interface between a steel plate and the fire proof coatings covering the steel plate. The elements i use in the simulation is contact 173 with a material property of debonding,which is defined as cohesive zone model.(CZM)

 CZM in ansys provides  TBDATA such as maximum contact stress,contact at the completion of debonding, but what's the problem is that I failed to set the initial contact stiffness. it's true that ansys provides FKN to define the contact stiffness, but it's just a stiffness factor.

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