Transactions of Materials and Heat Treatment

Title：Coupled thermal-mechanical finite element model in shear-bending process of Ti-alloy thin-walled tube under differential temperature fields constraints

Authors： Yan Jing1 2 3 Wu Wei1 2 3

Unit： 1. Aeronautical Key Laboratory for Plastic Forming Technology 2. Beijing Key Laboratory of Digital Plastic Forming Technology and Equipment 3. Beijing Aeronautical Manufacturing Technology Research Institute

KeyWords： Ti-alloy thin-walled tube shear bending differential temperature fields constraints coupled thermal-mechanical finite element

ClassificationCode：

year,vol(issue):pagenumber：2016,41(4):125-133

Abstract：

Based on the dynamic explicit coupled thermal-mechanical (CT) module in software ABAQUS, a 3D CT FE model of TA2 thin-walled tubes was established to simulate shear-bending process under differential temperature fields constraints. The key problems including the material model, the boundary conditions, the element types and sizes, and quality amplification were discussed. The reliability of the FE model was verified by the experimental results. The results show that quality amplification factor of 10000 is the most appropriate when considering the simulation precision and efficiency of the FE model. The smaller the element size is, the lower is the temperature of force transmission area in the straight line of tube; the distribution of simulation temperature field in the tube becomes stable when element size is less than 1.0 mm×1.0 mm. Compared with the CT continuum elements，the thickness strains distributions simulated by CT shell elements with the element size 1.0 mm×1.0 mm are closer to the experimental results.

Funds：

国家自然科学基金资助项目（51305415）

闫晶（1981-），男，博士，高级工程师

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