Long-term life prediction of woven CFRP laminates under three point flexural fatigue

摘要: Abstract This technical contribution reports details of an investigation the long-term flexural fatigue life behavior plain weave carbon 3K-70P/epoxy (CFRP) laminates using accelerated testing methodology (ATM) coupled with time temperature superposition principle (TTSP). Initially, dynamic mechanical analysis (DMA) tests were performed on CFRP to determine time-temperature shift factors followed by constant strain rate (CSR) at different temperatures construct creep strength master curve. The computed automated curve shifting programme. Horizontal found follow Arrhenius linear relationship for both above and below glass transition gradients. scatter in data was considered Weibull analysis. Flexural then conducted loads. Finally, curves constructed predict arbitrary frequencies load cycle ratios. Predicted non-default test parameters be good agreement experimental data.