The hybrid-adjoint method: a semi-analytic gradient evaluation technique applied to composite cure cycle optimization

摘要: A method is presented for determining the optimal autoclave temperature history pre-impregnated thermoset composites based on their failure performance. coupled finite-element model that incorporates a thermochemical and incremental elastic analysis used to predict residual stress distribution at edge of thick composite beam. The sought using gradient-based optimization algorithm. objective designed maximize minimum load manufactured beam amongst set cases, while constraints are imposed ensure uniformly cured does not sustain damage during manufacturing process. hybrid-adjoint, novel semi-analytic gradient evaluation technique developed, elements both adjoint direct sensitivity methods. Results demonstrate highly accurate competitive with full approach moderate number design variables.