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Optimization of Effective Parameters in Free Iron Sheet Forming Process by Underwater Explosion Method | ||
| مکانیک هوافضا | ||
| Article 7, Volume 18, Issue 3 - Serial Number 69, August 2022, Pages 87-108 PDF (2.31 M) | ||
| Document Type: Impact Mechanics | ||
| Authors | ||
| Sadegh Nasiri1; Milad Sadegh Yazdi* 2; Tohid Mirzababaie Mostofi3; Seyyed Mohsen Mousavi4; Mojtaba Ziya-Shamami4 | ||
| 1MSc, Faculty of Engineering, Imam Hossein Comprehensive University, Tehran, Iran | ||
| 2Corresponding author: Assistant Professor, Faculty of Engineering, Imam Hossein Comprehensive University, Tehran, Iran | ||
| 3Assistant Professor, Faculty of Mechanical Engineering, University of Eyvanekey, Eyvanekey, Iran | ||
| 4Researcher, Faculty of Engineering, Imam Hossein Comprehensive University, Tehran, Iran | ||
| Receive Date: 30 January 2022, Revise Date: 27 February 2022, Accept Date: 05 March 2022 | ||
| Abstract | ||
| One of the objectives of the present study is to optimize the effective parameters in the free sheet forming process under underwater explosive loading. In the experimental part, in order to investigate the effect of loading type on the maximum permanent deflection and thickness distribution of the plate, blasted-loaded plates due to 12 g and 4 g of explosive charge were used for single loading and repeated loading, respectively. Also, in order to investigate the effect of effective parameters on the process and optimize them, the Coupled Eulerian-Lagrangian method was firstly used for numerical simulation in ABAQUS finite element software. Then, in the optimization section, in order to investigate the simultaneous effect of explosive charge mass at each stage and the standoff distance on the maximum deformation and thickness of the sheet, Design-Expert software and Response Surface Methodology were used. The p-value obtained for the proposed model was less than 0.05, which indicates the significance of the model with a reliability of over 95%. The obtained results showed that the model provided by the software is suitable for this experiment and the values obtained from predicting the model are consistent with the experimental and numerical results. Also, the optimal conditions for the least change in plate thickness and the highest amount of permanent deflection were presented. | ||
| Keywords | ||
| Underwater explosion; Repeated Loading; Sheet forming; Numerical simulation; Optimization | ||
| References | ||
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