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首页> 外文期刊>Journal of Materials Engineering and Performance >Fatigue of Composite Materials Subjected to Variable Loadings
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Fatigue of Composite Materials Subjected to Variable Loadings

机译：经受可变载荷的复合材料的疲劳

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摘要

A model describing the fatigue behavior of composite materials under variable loadings is presented. The approach is based on a two-parameter model fulfilling the principal responses' features of composite materials subjected to constant amplitude cyclic loadings. It is shown that when coupled with the equivalent residual strength assumption the model can describe the strength degradation of composite materials subjected to variable amplitude loadings without simplifications or substantial reductions of the loading spectrum. Compared to the linear Miner's rule, the results highlight the importance of the sequence of loads and the approach discriminates the ascending, descending and random patterns. It is shown that for the case under study the ordered descending (high to low) sequence showed the worst scenario in terms of damage accumulation extent, while the random spectrum resulted in an intermediate response between ordered ascending and descending sequences.
机译：提出了一种描述可变载荷下复合材料疲劳行为的模型。 该方法基于实现经受恒定幅度循环负荷的复合材料的主要反应的两个参数模型。 结果表明，当与等效的残留强度假设耦合时，模型可以描述经受可变幅度载荷的复合材料的强度劣化，而无需简化或大幅减少装载谱。 与线性矿工的规则相比，结果突出了负载序列的重要性，并且方法识别升序，下降和随机模式。 表明，对于正在研究的情况下，有序下降（高到低）序列在损伤积累范围内显示了最差的情况，而随机谱导致有序的上升和下降序列之间的中间响应。

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