Mechanics & Industry
Volume 18, Number 4, 2017
|Number of page(s)||7|
|Published online||28 August 2017|
Numerical and experimental study of bursting prediction in tube hydroforming of Al 7020-T6
School of Mechanical Engineering, Iran University of Science and Technology,
* e-mail: email@example.com
Accepted: 6 March 2017
In this study, forming limit diagram (FLD) of tubular material (Al 7020-T6) was determined numerically and experimentally. A set of experimental bulge tests were carried out to determine FLD under combined internal pressure and axial feeding. Also, a numerical approach which is based on the acceleration of plastic strain (i.e., the second derivation) was applied to compute the hydroforming strain limit diagram. Based on this method, the localized necking would be started when the acceleration of the max plastic strain got its maximum value. Finally, the numerical FLD was verified by experimental test results on the aluminum tube 7020-T6 and a good agreement between the proposed method and the experimental works was observed.
Key words: tube hydroforming / bursting / second derivative of strain / forming limit diagram / experiment
© AFM, EDP Sciences 2017
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