论文部分内容阅读
对具有中心穿透斜裂纹在弹性断裂和完全塑性断裂两种破坏模式下的断裂强度进行了分析。在弹性破坏模式下,利用应变能密度因子准则对不同的裂纹倾斜角和不同的矩形板长宽比对斜裂纹的初始扩展角度的影响进行了数值计算和讨论。对于延性材料的完全塑性断裂模式,利用弹塑性有限元对不同裂纹倾斜角下的矩形板的极限拉伸强度进行了分析,并对中心穿透裂纹拉伸强度简化计算公式进行了考虑裂纹倾斜角度的修正。
The fracture strength of the center-penetrating oblique crack under both failure modes of elastic fracture and complete plastic fracture was analyzed. In the elastic failure mode, the effects of different crack angles and different aspect ratios on the initial crack propagation angle are numerically calculated and discussed using the strain energy density factor criterion. For the complete ductile fracture mode of ductile materials, the ultimate tensile strength of rectangular plates with different crack angles is analyzed by elasto-plastic finite element method, and the simplified calculation formula of the tensile strength of the central penetration crack is taken into account to consider the crack inclination angle Correction.