Characterizing Fatigue Behavior in Fiber Reinforced Plastics

2 Characterizing Fatigue Behavior in Fiber Reinforced Plastics 

Various criteria are utilized to describe fatigue behavior under dynamic load that are generally derived from the intended application  

Figu re 1.64 Various criteria for characterizing fatigue behavior in fiber reinforced plastics (schematic) [ /18] 

At the (P = 0.1) line, 10% of the test specimens are fractured, at the middle line 50%, at the (P= 0.9) line 90% failed. It is obvious that the width of fracture probability (number of stress cycles) increases with decreasing load. 

Figu re 1.66 Typical stiffness curves of various fiber reinforced plastics plotted against service life 

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