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Simulation of crack propagation using mixed mode intensity

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Hi all,
I have read 2 following documents that related to crack propagation.

www.comsol.com/model/mixed-mod...of-a-laminated-composite-19961
www.comsol.com/model/single-edge-crack-988

The examples talk about the first mode of crack propagation and they based on symmetric plane. I am thinking that if we can implement a procedure by using mixed mode intensity (K1, K2) a crack propagate in an arbitrary direction. On this condition, do you think that it is possible to simulate a crack propagation in an arbitrary direction with COMSOL? If so, do you have any idea on how to implement the problem? In fact I want to solve a poroelasticity problem which I have a porous media and the pressure is supplying by fluid pumping. But I have some problem in my example and it does not show a proper result.

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