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Tensile Fatigue Failure Criterions for Glass Fabric Reinforced Epoxy Composites
Pages: 216-220
Year: Issue:  4
Journal: Failire Analysis and Prevention

Keyword:  ±45°铺层复合材料拉伸疲劳刚度失效判据;
Abstract: 以试样断裂为失效判据,测试得到了±45°玻璃布增强环氧复合材料(EW250F/3238A)的拉伸疲劳S-N曲线.发现了该类复合材料具有明显的拉伸疲劳大变形、刚度衰减特征.对于该类复合材料,单纯以试样断裂作为失效判据确定其疲劳寿命是不合理的,必须考虑材料的刚度变化,根据工程经验制定刚度失效判据,合理地确定其疲劳寿命.提出以位移峰/谷值增长率或动刚度保持率来表征该类复合材料的刚度失效判据,并验证了其可...
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