圧力容器の許容初期変形量を検討するための大変形理論解析

概要

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In a large pressure vessel built with 5teel plates, there often occur local distortions due to errors in assembling parts and thermal deformation during welding processes and so on. In these regions, large strain concentration is caused by internal pressure. The estimation of an allowable amount of distortion is therefore very important to maintain the reliability of the pressure vessel. In the present paper, stress-strain behavior was theoretically analyzed in distortion regions of a spherical pressure vessel with initial distortion. A large deformation analysis is generally necessary in this analysis because a pressure vessel has relatively thin walls. The formulations of the amount of strain in distortion regions were derived by the large deformation theory on the basis of infinitesimal strain for various types of initial distortion and boundary conditions. Comparing the results of calculation with those of experiment, the theoretical formulae were shown to be very useful for deterrninin9 the allowable amount of distortion.
一般社団法人日本機械学会の論文
1989-02-25