I am trying to simulate the running condition of timing belt and also trying to find out the reason of its loosening. As the material of belt is polyurethane, i am using Hyperelastic material property for simulation. And Dynamic implicit analysis. But with these conditions, torque is not getting transmitted from one gear to another through belt. Belt teeth are locally deforming. Attached is the assembly configuration and animation pic of it.

Can some one please tell me, what corrective action is required to simulate the belt running condition. And what parameter is to be checked to find out loosening behavior.

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