On the Effects of Strain Rate and Heat on Forming Limit Diagrams

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Sohbatloo, Ashkan | 2017

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 49791 (08)
University: Sharif University of Technology
Department: Mechanical Engineering
Advisor(s): Asempour, Ahmad
Abstract:
Sheet metal forming is widely being used in the production fields. Improve of quality, production rate and efficiency of this process are important. Temperature and strain rate are the most effective parameters on the formability of sheet metals. Utilizing forming limit diagram is the most common method of determining the formability. In this study, forming limit diagram of AA3003 aluminum alloy is extracted in different temperatures and velocities using simulation of Nakazima test with Abaqus finite element software. The simulation results, indicate that at 250°C formability is about 3 times more than that at room temperature. increasing the velocity of the punch in low strain rates causes a drop in the forming limit curve. The effect of strain rate is more important in hot forming. The experimental results from the published literature are compared to the FLC in this study
Keywords:
Sheet Metal Forming ; Forming Limit Diagram (FLD) ; Strain Rate ; Aluminum Alloy 3003 ; Hot Forming

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