Stress Analysis of Pressure Vessels with Threaded Joint

• Main Authors: Jyun-Wei Zang, 曾俊偉
• Other Authors: 陳政順
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/am9fh6

碩士 === 國立臺北科技大學 === 製造科技研究所 === 98 === This study investigates on the stress–strain distribution, stress concentration factors, and fracture behavior of an Al 6061-T6, 1 1/4PT threaded pressure vessel under pre-load and internal pressure. The commercial finite element software, ANSYS, is used to simulate the stress distribution of threaded joint, and the stress concentration factor (SCF) and contact stress around the threaded portion are calculated and analyzed. The results show that the stress concentration factors for threaded joint are between 2.97 to 3.95 under the internal pressure of 25MPa. And the higher equivalent stresses are generated around the ends of the mating threads which seems to be the critical locations for failure. This had been validated by experimental test. Finally, the connection strength of different types of threaded joint of pressure vessels is also studied and the results reveal that the taper pipe threads have the highest load capacity compared to others under the same loading conditions.