Study on the Deformation Behavior of TA1 Thin-walled Tube into Bulge by Constrained Compression
MO Ningning1, FENG Zhiguo1,2,*, TAO Liang1, JIANG Yulian1, LIU Yong1
1 College of Mechanical Engineering, Guizhou University, Guiyang 550025, China 2 Guizhou Key Laboratory of Special Equipment and Manufacturing Technology, Guizhou University, Guiyang 550025, China
Abstract: The plastic deformation of a TA1 titanium alloy thin-walled tube directly affects the quality of bulging forming. Without considering the influence of temperature on the flow stress of TA1, a numerical model for axial constrained compression of TA1 thin-walled tube was established through secondary development of DEFORM. The behavior of compressing TA1 thin-walled tube into bulges was analyzed through simulation and experiments. The influence of the binding object height H, die stroke S, binding object hole diameter D, and die velocity V on the radial flow behavior of the thin-walled tube was analyzed. The results indicate that the relative error of dimensions describing shape of the bulge area is within 9.7%, which verifies that the axially constrained compression model of TA1 thin-walled tube can describe the flow behavior of the material accurately. The C1 region of the bulge has the largest degree of deformation, the densest metal flow lines, and the most obvious stress concentration and hardening phenomenon. The effects of the aforementioned four parameters on the bulge diameter can be sequenced as H＞D＞S＞V.
莫宁宁, 冯治国, 陶亮, 江玉莲, 刘勇. TA1薄壁管约束压缩为鼓包的变形行为研究[J]. 材料导报, 2025, 39(10): 24030126-9.
MO Ningning, FENG Zhiguo, TAO Liang, JIANG Yulian, LIU Yong. Study on the Deformation Behavior of TA1 Thin-walled Tube into Bulge by Constrained Compression. Materials Reports, 2025, 39(10): 24030126-9.
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2025, Vol. 39 
