• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>SEM IX International Congress on Experimental Mechanics June 5-8, 2000 Orlando, Florida >Fracture of cracks under mixed mode loads
【24h】

Fracture of cracks under mixed mode loads

机译：混合模式载荷下的裂纹断裂

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Two types of fracture inforamtion are generally sought in the interpretation and prediction of mixed mode fracture of solids, i.e. the fracturing loads (or fracture toughness) and crack propagation direction. Among different fracture criteria proposed, the maximum hoop stress criterion by Erdogan and Sih (1) provides the most simple and reliable prediction for both the crack propagation direction and the loads for materials that fail in the brittle manner. For materials that fail in the ductile manner, however, experimental evidence has suggested that the failure under mixed mode conditions can be governed by either opening type or shear type depending on the specimen geometry and loading conditions. In this paper, we present an analysis for the prediction of this transition of failure from opening type to shear type. The analysis is further generalized to include materials that exhibit different ductility. Consequently a theory, which is valid to materials ranging from extremely brittle to highly ductile, is developed. Experiments were then performed for cracks under mixed mode 1/11 and 1/111 loading conditions to verify the theory. It is concluded that the theory accurately predicts (1) when, i.e. under what mode mixity, the transition from tensile to shear type of fracture would occur and (2) what direction the crack would propagate for a given material and load mixity.
机译：在解释和预测固体的混合模式断裂时，通常寻求两种类型的断裂信息，即断裂载荷（或断裂韧性​​）和裂纹扩展方向。在提出的不同断裂准则中，Erdogan和Sih（1）提出的最大环向应力准则为裂纹扩展方向和脆性材料的载荷提供了最简单，最可靠的预测。但是，对于以延性方式破坏的材料，实验证据表明，根据样品的几何形状和加载条件，混合模式条件下的破坏可以通过开口型或剪切型来控制。在本文中，我们对从开孔型到剪切型的这种失效过渡的预测进行了分析。该分析被进一步概括为包括具有不同延展性的材料。因此，发展了一种理论，该理论适用于从极脆到高延展性的材料。然后在混合模式1/11和1/111载荷条件下对裂纹进行了实验，以验证理论。结论是，该理论准确地预测了（1）何时，即在何种模式混合下，将发生从拉伸型到剪切型断裂的转变，以及（2）对于给定的材料和载荷混合，裂纹将向哪个方向传播。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号