摘要
结合对脆性材料常规破坏试验结果的分析 ,修正了脆性断裂强度条件 ,将新的强度条件用于解决复合型裂纹的断裂问题 ,认为应力三维度极大值处对应于裂纹的启裂位置 ,裂纹的启裂方向则与该处的最大拉应力方向有关。给出了一个新的复合型断裂判据 。
Combining the analysis of brittleness in material convention destruction test result, the strength conditions of brittle fracture are revised and the new strength conditions are used to solve the problem of fracture with the mixed mode crack. It is considered that the crack opening positions corresponding to the maximum value of the stress tri axicity and the crack opening directions are related to the maximum traction stress. The new criteria of mixed mode fractures are given, which are tested and verified using the results of experiment of plane strain mixed mode fracture on aluminum alloy.
出处
《西安理工大学学报》
CAS
2000年第1期47-50,73,共5页
Journal of Xi'an University of Technology
关键词
断裂判据
强度条件
应力三维度
危险点
断裂方向
fracture criterion
strength condition
stress tri axicity
the dangerous point
fracture direction
