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静加载(静拉、静压,静弯、静扭转等)和一次冲击加载破坏的断口称为一次加载断口。在实际使用中发生一次加载断裂的情形是较为少见的,也是比较简单的,但是,掌握一一次加载宏观断口的典型特征对于分析常见的疲劳断口是很有用处的。一、断口三要素静力和一次冲击破坏的断口,破坏起点(破坏开始处称为起点)区域是纤维状的,随后为开裂急剧扩大的放射状区域,最后产生切断破坏的剪切唇部。这三者称为断口的三要素。
Static load (static pull, static pressure, static bending, static twisting, etc.) and an impact loading damage fracture is called a loading fracture. It is relatively rare and relatively simple to have a load fracture in actual use, however, it is useful to analyze the typical features of macro-fracture, which are commonly used to analyze fatigue fracture. First, the fracture of the three elements of the static and impact of a broken fracture, the destruction of the starting point (the beginning of destruction referred to as the starting point) region is fibrous, followed by sharp expansion of the radial zone, and finally cut off the cutting edge damage. These three are called the three elements of fracture.