Abstract
AbstractThis papier studies the critical stress state prediction for production‐ and operation‐induced loads on an epoxy‐based mold in an electric rotor. The constitutive behavior of the mold is given by a linear thermo‐viscoelastic material model with an ARRHENIUS‐based time‐temperature superposition, which is modified to also account for chemical curing shrinkage. A finite element analysis (FEA) is performed to evaluate two loading states which result in mold failure due to cracking. The results are compared to experimental evidence. The method is found to predict the location of crack initiation, as well as the direction of crack propagation.
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