FRACTOGRAPHY - DETERMINING THE SITES OF FRACTURE INITIATION
FRACTOGRAPHY - DETERMINING THE SITES OF FRACTURE INITIATION
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DOI：
10.1016/0109-5641(95)80045-x
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发表时间：
1995-03-01
期刊：
影响因子：
5
通讯作者：
MECHOLSKY, JJ
中科院分区：
文献类型：
--
作者：
MECHOLSKY, JJ
断口分析是对断裂表面的分析。这里，它是指将断裂力学原理应用于脆性材料断裂表面观察到的形貌的定量断裂表面分析（FSA）。 FSA 的应用基于脆性材料断裂表面上编码的是断裂过程的整个历史的原理，ii 是我们的任务是开发解码此信息的技能和知识。应用我们的 FSA 知识有几个激励因素。首先也是最重要的是，可以从断裂表面获得具体的定量信息。这些信息包括识别断裂起始裂纹或缺陷的尺寸和位置、失效时的应力状态、局部或整体残余应力是否存在、应力腐蚀是否存在以及影响断裂过程的局部加工异常的知识。第二个推动因素是信息是免费的。一旦材料经过测试失败，编码信息就变得可用。如果我们决定观察断裂过程中产生的特征，那么我们会获得很多信息。如果我们决定忽略断裂面，那么我们只能猜测和/或推理故障原因，而无法利用所有可能的可用信息。本文讨论了定量断裂面分析在基础研究、材料和产品开发以及使用中故障“故障排除”中的应用。首先，将介绍所涉及的基本原则。接下来，将介绍应用这些原则所需的方法。最后，将对演讲进行总结，展示设计的适用性和可靠性。
Fractography is the analysis of fracture surfaces. Here, it refers to quantitative fracture surface analysis (FSA) in the context of applying the principles of fracture mechanics to the topography observed on the fracture surface of brittle materials. The application of FSA is based on the principle that encoded on the fracture surface of brittle materials is the entire history of the fracture process, ii is our task to develop the skills and knowledge to decode this information.There are several motivating factors for applying our knowledge of FSA. The first and foremost is that there is specific, quantitative information to be obtained from the fracture surface. This information includes the identification of the size and location of the fracture initiating crack or defect, the stress state at failure, the existence, or not, of local or global residual stress, the existence, or not, of stress corrosion and a knowledge of local processing anomalies which affect the fracture process. The second motivating factor is that the information is free. Once a material is tested to failure, the encoded information becomes available. If we decide to observe the features produced during fracture then we are rewarded with much information. If we decide to ignore the fracture surface, then we are left to guess and/or reason as to the cause of the failure without the benefit of all of the possible information available.This paper addresses the application of quantitative fracture surface analysis to basic research, material and product development, and ''trouble-shooting'' of in-service failures. First, the basic principles involved will be presented. Next, the methodology necessary to apply the principles will be presented. Finally, a summary of the presentation will be made showing the applicability to design and reliability.