Analysis on the effects of material models on wall thickness variation of tube bending based on numerical simulation

作者：Zheng Chen Yang^*; E Da Xin; Liu Ying; Li YanMin; Tian Xin

来源：Journal of Plasticity Engineering, 2010, 17(5): 23-26.

DOI：10.3969/j.issn.1007-2012.2010.05.006

• Finite element simulation
• Material model
• Tube bending
• Wall thickness thinning

The true stress-strain curve derived from the tube tensile test is fitted to dual-linearity material model and power exponent hardening model, for computing wall thickness variation of 1Cr18Ni9Ti tube with finite element simulation. Through comparison and analysis, following conclusions can be made: 1) By taking the true stress-strain as the load curve of finite element simulation, the coincidence of the calculation results with the experimental results is the most satisfactory. Besides, the results derived by using dual-linear material model are more accurate than using power exponent model. 2) Wall thickness variation is primarily located at middle section of bent tube. The deformation easing effect at the connection border of the bent tube and straight tube causes the gradual decrease of the wall thickness variation of the bent tube at the tube ends. Certain extent of wall thickness variation also occurs at straight tube.

• 出版日期2010
• 单位北京理工大学