前言众所周知,焊接接头的型式及尺寸要素对于焊接结构的强度有十分重要的影响,特别是焊接接头的应力集中情况往往是引起脆断或者疲劳破坏的主要因素。因此,对于重要的受力结构,对其焊接接头类型的选择以及尺寸要素的确定十分严格,要求焊接接头的应力集中系数尽可能降低,以使接头应力分布比较均匀。关于焊接接头应力分布形态,国内在这方面的研究甚少。所引用的资料往往还是国外在五十年代用光弹所得的个别数据,显然这是 Preface As we all know, the type and size of welded joints for the strength of the welded structure has a very important impact, especially the welded joints stress concentration is often the cause of brittle fracture or fatigue damage of the main factors. Therefore, for the important structure of the force, the choice of the type of welded joints and the determination of the size factor is very strict, requiring the stress concentration factor of the welded joint as low as possible to make the joint stress distribution more evenly. On the welded joints stress distribution patterns, the domestic research in this area is poor. The information cited is often the individual data obtained by foreign photoalts abroad in the fifties. Obviously this is