在建筑物倒塌、机械失灵和损坏、受压容器爆炸等事故中,常常出现材料的破裂、切断、变形、碎块飞散之类的现象。在这类具有破坏性的事故的调查中,应当根据材料的腐蚀、破裂、老化、疲劳、变形等情况进行技术鉴定。有关材料的性能及其测试方法,已有许多专业书籍详细论述。这里,结合破坏性事故的调查技术,重点阐述有关问题。 In the accidents such as building collapse, mechanical failure and damage, explosion of pressure vessels, etc., there are often phenomena such as cracking, cutting off, deformation, and scattering of materials. In the investigation of such destructive accidents, technical appraisals should be conducted based on the corrosion, fracture, aging, fatigue, and deformation of the materials. Many professional books have been discussed in detail about the properties of materials and their testing methods. Here, in conjunction with the investigation techniques of destructive accidents, we will focus on the relevant issues.