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三通是管道应用中不可缺少的部件。常常采用的三通形式有焊接三通、铸造三通、锻造三通、顶拉三通和挤压三通。工程中为了施工的方便最常用的是现场焊接的三通,特别是当管道尺寸比较大时,不同管径的直管焊制异径三通为最多的三通形式。对于工程中大量使用的中、低强度钢,线弹性断裂力学的使用受到了限制,弹塑性断裂分析的应用越来越广泛。但是由于不同类型管件全塑性解的缺乏,使弹塑性断裂分析存在较大难度。本文采用有限元计算方法计算了
Tee is an indispensable part of pipeline applications. Often used in the form of tee three links, casting tee, forging tee, the top pull tee and squeeze tee. In order to facilitate the construction of the project is the most commonly used on-site welding tee, especially when the pipe size is relatively large, different diameter of the straight pipe welding tee is the largest three-way form. The use of linear elastic fracture mechanics has been limited for medium and low strength steels, which are widely used in engineering. The application of elastoplastic fracture analysis is more and more widely used. However, due to the lack of all plastic solutions of different types of pipe fittings, the analysis of elastoplastic fracture has great difficulty. This paper uses the finite element calculation method to calculate