Thermo-mechanical coupling analysis of expansion tubes: Theoretical prediction and experimental investigation
作者： Heng Ban , Shuguang Yao , Lin Zhang , Lin Zhang , Bowen Tan
DOI: 10.1016/J.TWS.2021.107559
关键词:
摘要: Abstract Thick-walled expansion tubes have been widely used in high-speed trains as passive energy-absorbing devices. Previous studies mainly focused on thin-walled with thickness less than 5 mm, and the theoretical model is good agreement experiments. However, a deviation of about 4.3% for thick-walled 15 mm found between predictive reaction force experimental results. In this study, thermal effect was investigated deviation. Firstly, modified proposed by plastic hinge moving method. Secondly, temperature distribution calculated, new obtained temperature-dependent material properties. A reduction coefficient to represent ratio considering or not. Finite element simulations measurements were performed verify current model. The results show that affected geometrical structure, properties, ambient temperature. deformation modes can be divided into point contact mode surface mode, increase angle. similar, so coefficient. vary from 0.98 0.97 7–33 mm. This study provides better understanding an evaluation method higher accuracy design.
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