A fatigue damage meso -model for fiber-reinforced composites with stress ratio effect
A fatigue damage meso -model for fiber-reinforced composites with stress ratio effect
复制标题
考虑应力比效应的纤维增强复合材料疲劳损伤细观模型
DOI：
10.1016/j.matdes.2016.06.040
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发表时间：
2016-10
影响因子：
8.4
通讯作者：
Wenjiao Zhang;Zhengong Zhou;F. Scarpa;Shuyuan Zhao
中科院分区：
文献类型：
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作者：
Wenjiao Zhang;Zhengong Zhou;F. Scarpa;Shuyuan Zhao
本文提出了纤维增强塑料复合材料的疲劳损伤模型，该模型考虑了应力比对离轴疲劳行为的影响。在连续损伤力学方法中引入了无量纲有效应力的概念。在细观水平上，研究了轴向、横向和剪切方向的损伤扩展和疲劳破坏。通过对离轴单向纤维增强塑料复合材料层合板在不同应力比下的损伤累积和疲劳寿命的数值模拟，验证了该模型的有效性。结果表明，该模型能较好地描述离轴单向玻璃/环氧和碳/环氧复合材料层合板在不同应力比范围内的疲劳损伤行为和疲劳寿命。
This work presents a fatigue damagemeso-model for fiber-reinforced plastic composites, in which the effect of stress ratios on the off-axis fatigue behavior is taken into account. The non-dimensional effective stress concept is introduced in the continuum damage mechanics method. Damage growths and fatigue failure are studied along axial, transverse and shear directions atmeso-scale level. The proposed model is validated through numerical simulations that describe themesofatigue damage accumulation and the fatigue life for off-axis unidirectional fiber-reinforced plastic composite laminates of arbitrary fiber orientation under different stress ratios. It is shown that the fatigue damage behavior and fatigue life for off-axis unidirectional glass/epoxy and carbon/epoxy composite laminates are adequately described by the proposed fatigue model over the range of different stress ratios.