Numerical and experimental study of bursting prediction in tube hydroforming of Al 7020-T6

Publish Year: 1395
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:

IIAC04_109

تاریخ نمایه سازی: 22 دی 1396

Abstract:

In this study, forming limit diagrams of tubular materials (Al 7020-T6) were determined numerically and experimentally. A set of experimental bulge tests were carried out to determine forming limit diagram 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 major plastic strain got its maximum value. Finally, the numerical forming limit diagram was verified by experimental test results on the aluminium tube 7020-T6 and a good agreement between the proposed method and the experimental works was observed.

Keywords:

Tube hydroforming , Bursting , Second derivative of strain , Forming limit diagram

Authors

R Hashemi

School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran

A Afshar

School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran

D Rahmatabadi

School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran