A reliability method for optimization of [+ φ -- φ]_n fiber reinforced composite pipes

摘要

This paper presents damage strength optimization of laminates using a reliability-based method. Two complementary analyses are developed f the first is a mechanical analysis of damage behavior using a thermodynamics framework that determines the failure criterion; the second is a reliability method which takes not only randomness, but also statistical uncertainties into account for failure probability calculation. This method is based on a first order reliability method that requires the resolution of a constrained problem of optimization. To solve this problem, a hybrid algorithm, combining evolutionary computation techniques with deterministic procedure is presented. Filament- wound pipe optimization under pressure is discussed as a working example.