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三维正交机织复合材料低周弯曲疲劳力学性能有限元模拟

, PP. 797-802

Keywords: 三维正交机织复合材料,低周弯曲疲劳,力学性能,有限元分析,应力分布,疲劳损伤

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Abstract:

为了深入理解三维正交机织复合材料(3DOWC)疲劳性能,改进材料抗疲劳设计,结合三维正交机织复合材料试样经纱方向准静态三点弯曲及60%应力水平下的三点弯曲疲劳实验与ABAQUS有限元软件,构建了全尺寸三维实体模型,研究了三维正交机织复合材料在低周循环载荷下的弯曲疲劳性能,经分析得到循环加载下模型应力分布情况和疲劳损伤形态。结果表明:经纱为材料最重要的承载部件,中间加载区域为材料应力集中区,损伤主要位于应力集中区的Z纱通道处的经纱上,随着循环增加,逐渐在中心加载区域的上部和下部形成三角形损伤区域,该研究在复合材料设计与优化中具有指导意义。

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