Fatigue of Composite Materials Subjected to Variable Loadings
Fatigue of Composite Materials Subjected to Variable Loadings
复制标题
复合材料在可变载荷下的疲劳
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
A. Califano
中科院分区：
文献类型：
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作者：
A. Califano
本文提出了一种描述复合材料在谱载荷作用下疲劳行为的模型。该方法基于描述纤维增强材料在恒定和变幅循环载荷下强度退化动力学的双参数模型。所提出的方法的优势在于，它允许考虑循环载荷，因为他们是，没有简化或减少。特别是，该模型的分析背景是基于控制复合材料行为的陈述，并侧重于这类材料在遭受疲劳时的相关问题。然后，最后一步是定义损伤累积规则，该规则在应用于纤维增强材料时优于Miner规则的不可靠性。事实上，它允许考虑不同加载历史的影响，强调了在所提出的方法框架中加载应用顺序的重要性。
In the present work, a model describing the fatigue behaviour of composite materials under spectrum loading is presented. The approach is based on a two-parameter model describing the strength degradation kinetics for fibre-reinforced materials subjected to cyclic loadings, both with constant and variable amplitudes. The point of strength of the presented approach is that it allows to consider cyclic loadings as they are, without simplifications or reductions. In particular, the analytical background of the model is based on the statements that govern the composites behaviour and focused on the issues related to this class of materials when subjected to fatigue. Then, the final step is the definition of a damage accumulation rule that goes over Miner’s rule unreliability when applied to fibre-reinforced materials. As a matter of fact, it allows to take into account the effects of different loading histories, underlining the importance of the sequence of loads application in the framework of the presented approach.