一引言在各种工程机械、汽车、飞机、船泊上,在房屋建筑、道路桥梁中,经常大量使用连接件,而且这些连接件往往处于受力最严重、最复杂的关键部位。以往,在工程实践中,对这些连接件的应力分析,往往是采用半理论半经验公式进行计算,比较粗糙,内部应力分布情况究竟如何,并不清楚,因此连接件往往也就制造得比较笨重。近年来由于优化设计的普遍推广应用,为了确保结构的安全可靠和好的经济效果,有必要对连接件进行应力的细节分 I. INTRODUCTION In various construction machinery, automobiles, airplanes, boats and berths, connectors are frequently used in house buildings, roads, and bridges, and these connectors are often at the most critical and complex part of the stress. In the past, in the engineering practice, the stress analysis of these connectors was often calculated using semi-theoretical semi-empirical formulas. It was relatively rough and how the internal stress distribution was actually unclear. Therefore, the connectors were also often made cumbersome. . In recent years, due to the popularization and application of optimized design, in order to ensure the safety and reliability of the structure and the good economic effect, it is necessary to divide the stress of the connection parts into details.