RELIABILITY-BASED OPTIMIZATION DESIGN OF COMPOSITE MATERIAL DIRECTION PIPE

Base on the Tsai-Wu failure criterion and first order reliability method(FORM),the reliability analysis of a composite material direction pipe is carried out.Secondary development of ABAQUS by using Python language,the finite element program and the reliability analysis method are combined.The reliabilitybased optimization model of a composite material direction pipe is obtained by the combined optimal strategy with multi-island genetic algorithm(MIGA) and sequential quadratic programming(SQP).The results of an example application show that the weight of the composite material direction pipe decreased by 22.5% with the requirement of strength reliability.