Viscoelastic Designer Composite Materials

摘要

The paper presents an analytical study of viscoelastic composites consisting of calculus of variation and inverse approaches to determine optimum designer materials, which will specify optimum ply orientation, stacking sequences, number of fibers, number of plies, viscoelastic properties, weight, etc., for pre-determined service conditions. This is the opposite of selecting "off the shelf" composites with available fiber orientation to satisfy the identical task. The ultimate aim is to analytically engineer composites that lead to low weight, high strength and long life aerospace structures. The governing constraint for the designer material considerations is delamination onset probability and creep survival / life time.