Transactions of Materials and Heat Treatment

Title：Trends study of deformation for free inversion of variable-diameter tube

Authors： Deng Tiangen Lei Junxiang

Unit： University of Shanghai for Science and Technology

KeyWords： hydraulic bulging and folding variable-diameter tube mode of deformation free inversion

ClassificationCode：TH14

year,vol(issue):pagenumber：2014,39(2):144-149

Abstract：

In the process of forming from tube to variable-diameter tube by hydraulic bulging and folding, there are three kinds of variable-diameter tubes, including truncated cone, inverted truncated cone and cylindrical shell. Different variable-diameter tubes have different modes of deformation by axial compression. With the increase of loading displacement, free inversion force and the degree of smoothing are not the same. Comparing the difficult degree of outer tube rolled to inner tube with inner tube rolled to outer tube, and studying modes of deformation for different variable-diameter tubes, numerical simulation and experimental study were conducted to study the free inversion force and the degree of smoothing for different variable-diameter tubes under the axial displacement. Numerical simulation and experimental study matched well, and it is concluded that variable-diameter tube which has cylindrical shell is the best.

Funds：

上海市自然科学基金资助项目(06ZR14143)

邓天根（1987-），男，硕士研究生

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