Transactions of Materials and Heat Treatment

Title：Research on TRB pipe hydraulic bulging bellows without feeding material

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ClassificationCode：TG394

year,vol(issue):pagenumber：2023,48(4):103-109

Abstract：

The relationships between TRB pipe parameters and S-shaped, V-shaped and U-shaped bellows parameters were established by theoretical design to establish the hydraulic bulging bellows without feeding material for the first time, and the finite element models of TRB pipe hydraulic bulging S-shaped, V-shaped and U-shaped bellows were established to verify the feasibility of hydraulic bulging without feeding material. The finite element simulation results show that the maximum wall thickness difference of S-shaped bellow is 8% of the designed wall thickness, and most of the wall thickness difference is 0%-2.25% of the designed wall thickness. The maximum wall thickness difference of V-shaped bellow is 9.33% of the designed wall thickness, most of the wall thickness difference is 0%-4.17% of the designed wall thickness, and the wall thickness is evenly distributed. The forming limit diagram shows that the forming stress states of S-shaped and V-shaped bellows are all within the safety zone, but U-shaped bellows break during the forming process. Therefore, TRB pipes can form S-shaped and V-shaped bellows with uniform wall thickness. But TRB pipes cannot form U-shaped bellows with uniform wall thickness. The simulation is basically consistent with the theoretical design.

Funds：

云南省教育厅科学研究基金项目（2022J1601）

作者简介：何滔（1977-），男，硕士，副教授 E-mail：728720332@qq.com 通信作者：顾栩（1991-），男，硕士研究生，助教 E-mail：2472183685@qq.com

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