New Mechano-Chemical Fatigue Model for Fiber-Reinforced Composites
Li Zhijun, Cheng Guangxu£¬Duan Quan
(School of Environmental and Chemical Engineering,Xi'an Jiaotong University,Xi'an 710049,China)

Abstract: A new mechano-chemical fatigue model for fiber-reinforced composites was developed, and the cyclic activation energy and the factor of residual strength were included in this residual strength-based model to reflect the effect of chemical reaction caused by the mec
hanical activation when the composites are subjected to cyclic loads. Based on this model, the reasons of many strange phenomena could be expressed easily, e.g.the fact that the intermittent-fatigue-life is much longer than continuous-fatigue-life. The statistical distribution of the residual strength is derived from this model and compared with Schaff's model, Whitworth's model and the available experimental data, and good agreement is observed between this prediction model and experimental results.
Keywords: mechano-chemical;fatigue;fiber-reinforced composites;residual strength