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Stress Analysis and Design Optimization of Angled Circular Pressurized Tube Under a Non-Isothermal Condition

Pressure tubes are used in various industries to transport high temperature steam, gas, liquid, and other fluids. Some components are usually required in pressurized tubing systems to relieve the high stress due to thermal expansion. Among them, U-tube is a kind which plays an important role. It is mainly serves as reinforcement and connection usage. In this study, the structural behavior of a non-isothermal U-tube under its simulated operating condition is investigated based on finite element analysis in conjunction with heat transfer and fluid mechanics theories. The investigation includes the structural stress analysis, temperature distribution analysis, the modal analysis, as well as the design optimization. A program based on the use of ANSYS is then provided for the users to select the optimal thickness of a U-tube under a safe operating condition.