Abstract
This chapter presents a practical approach to the evaluation of laminate strength. Three main types of failure criteria, that is, structural criteria indicating the modes of failure, approximation polynomial criteria treated as formal approximations of experimental data, and tensor-polynomial criteria are discussed and compared with available experimental results for unidirectional and fabric composites. A combined elastoplastic damage model and a strain-driven implicit integration procedure for fiber reinforced composite materials and structures that involve a consideration of their mechanical response before the initiation of damage, prediction of damage initiation, and modeling of postfailure behavior are discussed.
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