This is the first study on the fatigue tensile performance of a novel hybrid composite made as Type A (i.e. woven carbon fibers plus unidirectional flax fibers [W_C2/0_F12/W_C2]) or Type B (i.e. woven carbon fibers plus oblique flax fibers [W_C2/(±45)_F6S/W_C2]) in epoxy resin. Composite plates were examined under constant strain amplitude using conventional fatigue tests and constant stress amplitude using thermographic stress analysis at 5 Hz cycling with a constant amplitude ratio of 0.1. For conventional fatigue, the max strain ε_max versus cycles to failure N_f curve for Type A was log (N_f) = 9.7–588.2ε_max, while for Type B it was log (N_f) = 14.9–1000ε_max; neither material had a true endurance limit since curves never became horizontal. For thermographic stress analysis, high-cycle fatigue strength for Type A was 231.7 MPa (i.e. 56% of ultimate tensile stress σ_ut), while for Type B it was 203.2 MPa (i.e. 60% of σ_ut).

这是关于 A 型（即编织碳纤维加单向亚麻纤维 [W _C2 /0 _F12 /W _C2 ]）或 B 型（即编织碳纤维加斜亚麻）的新型混合复合材料的疲劳拉伸性能的首次研究纤维 [W _C2 /(±45) _F6S /W _C2 ]) 在环氧树脂中。使用常规疲劳试验在恒定应变幅度下检查复合板，并使用热成像应力分析在 5 Hz 循环下以 0.1 的恒定幅度比在恒定应力幅度下进行检查。对于常规疲劳，A 型的最大应变 ε _max与失效周期 N _f曲线为 log (N _f ) = 9.7–588.2ε_max，而对于 B 类，它是 log (N _f ) = 14.9–1000ε _max；两种材料都没有真正的耐久极限，因为曲线从未变为水平。对于热敏应力分析，对于A型高周疲劳强度为231.7兆帕（极限拉伸应力σ的即56％_UT），而对于B型是203.2兆帕（即σ60％_UT）。