压力容器接管区大应变分析

Analysis of large strain of pressure nozzles

通过运用基于有限变形理论的三维大应变弹塑性有限元程序和实测法详细研究了压力容器接管区的应力应变分布、塑性区成型规律及应力衰减等特性。分析表明：接管高应变区的大应变特性明显，在压力容器设计中应引起注意。

The paper studies the characters of the stress strain,the rules of the forms of plastics zones and strain gradient of the region of pressure vessel nozzles by using 3D large strain elastic plastic finite element program based on the theory of finite displacement and experiment method. It shows that large strain characters of pressure vessel nozzles are very obvious,and more attention should be paid to the designing of pressure vessels.