Volume 36, Number 4, August 2018
|Page(s)||701 - 708|
|Published online||24 October 2018|
Numerical and Experimental Study on TC4-DT Titanium Alloy Structure after Double Cold Expansion
School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072, China
Cold Expansion and Interference Fit are two well-known techniques in hole strengthening, having been widely used in aviation industry. Double cold expansion is a new strengthening process which effectively combined with the two techniques. A modelling method based on ABAQUS finite element method is proposed in order to study the effect of double cold expansion, which will include cold expansion, reaming process, interference fit and springback after that, the influence of edge distance ratio (EDR) on the stress-strain distribution has been studied. Proto-LXRD device has been used to measure the residual stress distribution in the surface of the specimens. Simulation and experimental results show that the stress distribution of the simulation is in an higher level than that of experimental, but the trends of the stress distribution are in a good agreement.
Key words: double cold expansion / ABAQUS / design of experiments / numerical simulation / X-ray diffraction / mesh generation
关键字 : 二次冷挤压强化 / 回弹 / 边距比 / 数值模拟 / X射线衍射
© 2018 Journal of Northwestern Polytechnical University. All rights reserved.
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