Abstract：Based on Solidworks modeling and ANSYS finite element analysis, the temperature distribution and mechanical properties of pressure vessels with dome end and dished end heads were compared under an internal pressure of 0.7 MPa and an internal temperature of -253 ℃. The results show that the overall temperature fields of the two are similar, while differences in peak value and location are observed. The maximum temperature (30.97 ℃) of the dome end head occurs at the middle region on the inner side of the end-cap, whereas the maximum teperature (28.87 ℃) of the dished end head occurs at the end-cap/inner-vessel junction plane. The maximum equivalent stress of the dome end head pressure vessel occurs in the circular arc transition section of the outer surface of the cylinder, which is 161.43 MPa, and the maximum equivalent stress of the dished end head pressure vessel is located in the constraint area of the connection between the base and the ground, which is 160.25 MPa. The dished end head pressure vessel optimizes the stress gradient through its transition-arc structure, significantly reducing the area of high-stress regions and the deformation. The maximum deformation is reduced to 0.217 5 mm, and the fatigue life reaches 25 486 cycles, which is 33% higher than that of the dome end head pressure vessel (19 094 cycles). This study reveals the key effects of structural design on temperature distribution, local stress distribution, and fatigue property, indicating that the dished end head achieves superior temperature uniformity, stiffness, deformation resistance, and fatigue resistance due to virtue of its segmented load-carrying, providing a theoretical basis for pressure vessel optimal design.
胡宇恒, 吴丽光, 陈瑞雷, 叶建波, 汪小康, 蔡高参. 碟形端部优化设计对激光增材制造压力容器结构件温度分布和力学性能的影响[J]. 粉末冶金材料科学与工程, 2026, 31(1): 62-70.
HU Yuheng, WU Liguang, CHEN Ruilei, YE Jianbo, WANG Xiaokang, CAI Gaoshen. Effects of dished end optimization on the temperature distribution and mechanical properties of additive manufacturing pressure vessels. Materials Science and Engineering of Powder Metallurgy, 2026, 31(1): 62-70.
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