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前言 正确显示断口形貌是正确认识断裂机理的基础。资料已对有机玻璃断口形貌显示的方法作了较为详细的介绍;有的资料将有机玻璃静拉、静弯、冲击、疲劳断口分作三个区域:镜面区、平坦区(雾区+肋状)、粗糙区(瞬断区)。但对三区细微特征的介绍还停留于光学成象的初级阶段,并且不尽详细。因此弄清各种断口各区细微特征,有益于正确认识断裂形成、受力方式乃至断裂机理。但由于受光学显微镜景深、放大倍数等自身条件的限制,势必给断面起伏大的有机玻璃断口的准确显示
Preface Correctly showing the fracture appearance is the basis for a correct understanding of the fracture mechanism. Materials have been plexiglass fracture surface shows a more detailed description of the method; some information will plexiglass static pull, static bending, impact, fatigue fracture is divided into three areas: mirror area, flat area (fog + rib Like), rough area (instantaneous area). However, the introduction of the subtle characteristics of the three districts still stays in the primary stage of optical imaging and is not exhaustive. Therefore, it is helpful to understand the fine features of all kinds of fractures and to understand the fracture formation, the way of stress and the fracture mechanism correctly. However, due to optical microscope depth of field, magnification and other limitations of their own conditions, it is bound to give a section of undulating plexiglass fracture accurate display