I am utilizing bilinear traction separation law in ANSYS. However I am unable to propagate crack INTO the matrix from the cohesive elements. Only results I am getting from APDL are cohesive separations in cohesive elements. Is there any way to create the crack as shown in the snapshot (shown by white pen). I have tried VCCT but since the geometry of fibers is round I am unable to give it a crack path.
Dear Akash,
For what loading condition you are expecting matrix cracks? What material model you are using for matrix?
Also, check load and boundary conditions.
Regards,
Chandrashekhar
Dear Chandrashekhar,
I am expecting matrix cracks for tensile loading (approximately 1% tensile strain) applied on the RVE. The material model for matrix is Linear Isotropic.
Regards,
Akash
Need to incorporate damage or failure model for the matrix to fail. What is the material of the matrix? Does it exhibit plasticity? Is the strength in tension and compression same?
Matrix is epoxy. In a paper I have seen them using plastic property for a different type of epoxy resin but since I do not have the plastic properties for my material, I am utilizing linear isotropic material model. Strengths in tension and compression are different. Do you suggest that it is necessary to model matrix with plastic properties?
Thanks
Regards,
Akash
Yes. To capture the actual failure/damage mode, I suggest to use Drucker-Prager model for epoxy. You can refer the literature for typical properties.
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