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An Energy-Based Fatigue Approach for Composites Combining Failure Mechanisms, Strength and Stiffness Degradation

H. KRÃœGER, R. ROLFES, E. JANSEN

Abstract


In order to improve the fatigue analysis of large structures made of fibre-reinforced plastics a physically motivated fatigue assessment procedure is investigated. In contrast to the analysis procedure usually applied the novel model consists of a layer-wise continuum mechanics approach on macro scale and considers different failure modes. The approach subdivides into two analysis parts: discontinuous quasi-static degradation and continuous fatigue degradation. The discontinuous approach is based on a well-known failure mode theory. The continuous degradation approach makes use of an energy-based hypothesis, which combines strength and stiffness degradation. With the present approach stress redistributions and sequence effects can be investigated.

Keywords


Fatigue modelling, reinforced composite, damage mechanics, layer-based approach, degradation, sequence effectsText

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