传统断裂强度理论存在的问题与几种材料的断裂规律

Some Problems Existing in Traditional Strength Theory of Fracture and Fracture Laws of Some Materials

考察了几种金属材料在不同复杂应力场下的断裂形式及物理机制的变化规律。针对复杂应力场下传统断裂强度理论应用上存在的几个问题 ,讨论了应力场中危险点的位置与危险点上断裂的影响因素 ,对材料的不同断裂形式的断裂条件提出了新认识。

The varying laws of fracture modes and physical mechanism of some metal materials under different complex stress fields are investigated. Aiming at some problems existing in the use of traditional fracture strength theories under complex stress fields, the positions of the dangerous points in stress field and the fracture influencing factors on dangerous points are discussed respectively. And a new recognition for fracture conditions of materials in different fracture modes is suggested in this paper.