拉扭加载下疲劳裂纹扩展的试验研究

来源 :南京航空航天大学学报（英文版） | 被引量 : 0次 | 上传用户：coolyl1979

【摘要】

：

对航空材料LY12CZ进行了多种比例和非比例拉扭双轴加载下的疲劳试验.采用弹塑性有限元方法对缺口孔边的应力应变进行了分析,探讨疲劳裂纹扩展方向与孔边各应力和应变分量之间

【作者】

：

王英玉姚卫星

【机构】

：

南京航空航天大学航空宇航学院

【出处】

：

南京航空航天大学学报（英文版）

【发表日期】

：

2004年期

【关键词】

：

多轴疲劳裂纹扩展比例加载非比例加载 multi-axial fatigue crack propagation proportional loading

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对航空材料LY12CZ进行了多种比例和非比例拉扭双轴加载下的疲劳试验.采用弹塑性有限元方法对缺口孔边的应力应变进行了分析,探讨疲劳裂纹扩展方向与孔边各应力和应变分量之间的关系.比较分析结果与试验数据得出:比例加载下,疲劳裂纹基本上在垂直于最大主应变方向扩展.45°及90°非比例加载下,疲劳裂纹沿着最大剪应变平面扩展.

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拉扭加载下疲劳裂纹扩展的试验研究

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