多年来,为防止脆性断裂而设计的结构,其焊缝金属均根据现在看来似乎有些随意的试验和一些相互抵触的要求选用的。这一认识是断裂力学逐渐发展的结果;断裂力学对检验过去的一些特例提供了一个可靠的基础。 本文是根据第一批研究会员的报告写成的,这些报告叙述了用全面屈服断裂力学对焊缝金属进行的大量研究工作 For many years, the structure designed to prevent brittle fracture, the weld metal seems to be a random test and some of the conflicting requirements now seem to choose. This understanding is the result of the progressive development of fracture mechanics; fracture mechanics provides a reliable basis for examining some of the past exceptions. This article is based on reports from the first member of the study describing a large number of studies on weld metal with total yield fracture mechanics