Tensile Damage Mechanisms of CWK Composites in Frequency Domain.

      Аннотация: Co-woven-knitted (CWK) fabric combines woven and knitted structure together, where warp and weft yarns in the woven structure insert into the weft-knitted structure. CWK fabric shows both the structure stability of woven and the extensibility and formability of knitted structure. The volume fraction of fibers can be increased and the tensile strength, stiffness and energy absorption of fabric reinforced composite can be increased in this novel structure. The CWK fabric is suitable to reinforce the composite in engineering design. This book reports the tensile impact behaviors of CWK composite and its damage mechanisms due to the special structure of CWK reinforcement. In this study, the tensile impact behaviors of CWK composite have been studied via experimentation, the tensile damage processing of CWK composite has been investigated through Finite Element Analysis (FEA) simulation. The frequency features of damage mechanisms of CWK composite have also been researched by a series of signal processing methods.

Ключевые слова: co-woven-knitted (CWK) composite, Tensile behavior, strain rate, finite element analysis (FEA), fast Fourier transform (FFT), Hilbert-Huang transform (HHT), system function