열하중 및 내압을 받는 축대칭 튜브와 운동체의 거동 해석

Thermoleastoplastic analysis of a typicaldevice consisting of tube and moving part having an initial clearance in between, which is subjected mechanical and thermalload, has been carried out toexamine the cause of malfunction mainly at hightemperature condition, and to improve the design. Permant deformation, extraction force, and stress distributions are discussed by using finite element method. The extraction energy can be remarkably reduced by changing the configuration of the cylinder from straight-type to ta[er-type and this effect has been proved by sustained cyclic test.