Volume 18, Issue 6 (10-2018)                   Modares Mechanical Engineering 2018, 18(6): 174-181 | Back to browse issues page

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Hosseini S, Habibi M, Assempour A. Experimental and numerical determination of forming limit diagram of steel-copper two-layer sheet considering the interface between the layers. Modares Mechanical Engineering. 2018; 18 (6) :174-181
URL: http://mme.modares.ac.ir/article-15-24211-en.html
1- Faculty of Mechanical Engineering, Sharif University of Technology, Tehran, Iran.
2- Faculty of Mechanical Engineering, Sharif University of Technology, Tehran, Iran. , assem@sharif.edu
Abstract:   (2737 Views)
In this study, special attention has been paid to modeling of the interface between the sheet metals in prediction of forming limit diagram (FLD) of two-layer sheets. In the present work, a two-layer sheet consists of 1.35 mm steel sheet and 0.45 mm copper sheet has been used. This two-layer sheet has been made by explosive welding method. To determine the FLD, numerical method has been used by applying ABAQUS finite element software. For this purpose, the so called Nakazima method has been simulated. The criteria used for determining the failure in steel and copper layers was GTN model. Also, in order to determine the failure in interface between the layers, the traction-separation law was used. For modeling the interface, cohesive elements were used. In order to verify the results, Nakazima tests were performed. The simulations and experimental works were done for both side directions of the sheets. The results indicate that the FLDs obtained by the numerical modeling are in good agreement with the experimental results.
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Subject: Aerospace Structures
Received: 2018/08/18 | Accepted: 2018/08/18 | Published: 2018/08/18

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