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147 Effect of loading pattern on fatigue behavior of laminated composites
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1  Ecole Polytechnique Fédérale de Lausanne


The effect of load interruptions on the fatigue behavior of (±45)2S angle-ply glass/epoxy composite laminates was investigated in this work. Constant amplitude fatigue experiments were performed at different stress levels to derive base line fatigue data. In addition, interrupted-fatigue experiments were performed by removing the cyclic loading for two hours repetitively, after cycling for 20% of the fatigue life achieved under continuous loading at the same maximum cyclic stress level. The specimens loaded under interrupted fatigue exhibited longer fatigue live than those continuously loaded until failure.

Keywords: Fatigue; Interrupted loading; Failure; Dissipated energy; Self-generated temperature