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بهینهسازی پارامترهای مؤثر در فرآیند شکلدهی آزاد ورق آهنی با روش انفجار زیرآب | ||
| مکانیک هوافضا | ||
| مقاله 7، دوره 18، شماره 3 - شماره پیاپی 69، مهر 1401، صفحه 87-108 اصل مقاله (2.31 M) | ||
| نوع مقاله: مکانیک ضربه | ||
| نویسندگان | ||
| صادق نصیری1؛ میلاد صادق یزدی* 2؛ توحید میرزابابای مستوفی3؛ سید محسن موسوی4؛ مجتبی ضیاءشمامی4 | ||
| 1کارشناسی ارشد، دانشکده فنی و مهندسی، دانشگاه جامع امام حسین (ع)، تهران، ایران | ||
| 2نویسنده مسئول: استادیار، دانشکده فنی و مهندسی، دانشگاه جامع امام حسین (ع)، تهران، ایران | ||
| 3استادیار، دانشکده مهندسی مکانیک، دانشگاه ایوانکی، ایوانکی، ایران. | ||
| 4پژوهشگر، دانشکده فنی و مهندسی، دانشگاه جامع امام حسین (ع)، تهران، ایران | ||
| تاریخ دریافت: 10 بهمن 1400، تاریخ بازنگری: 08 اسفند 1400، تاریخ پذیرش: 14 اسفند 1400 | ||
| چکیده | ||
| یکی از اهداف پژوهش حاضر، بهینهسازی پارامترهای مؤثر در فرآیند شکلدهی آزاد ورق تحت بارگذاری انفجاری زیرآب است. در بخش تجربی، جهت بررسی اثر نحوه بارگذاری بر میزان بیشترین خیز دائمی و توزیع ضخامت ورق، از ورق‌های آهنی تحت انفجار ناشی از 12 و 4 گرم خرج انفجاری به ترتیب برای بارگذاری منفرد و بارگذاری مکرر سه مرحلهای استفاده شد. همچنین، به‌منظور بررسی اثر پارامترهای مؤثر بر فرآیند و بهینهسازی آن‌ها، ابتدا از روش کوپل اویلری-لاگرانژی جهت شبیه‌سازی عددی در نرم‌افزار المان محدود آباکوس بهره گرفته شد. سپس، در بخش بهینهسازی، پاسخ به‌منظور بررسی تأثیر همزمان پارامترهای جرم خرج انفجاری در هر مرحله و فاصله استقرار روی بیشترین میزان تغییر شکل و ضخامت ورق، از نرم‌افزار طراحی آزمایش و روش سطح استفاده شد. p-value به‌دست‌آمده برای مدل ارائه‌شده کمتر از 05/0 بود که این حاکی از معنی‌دار بودن مدل با ضریب اطمینان بالای 95% است. نتایج به‌دست‌آمده نشان داد که مدل ارائه‌شده توسط نرم‌افزار برای این آزمایش مناسب بوده و مقادیر به‌دست‌آمده از پیش‌بینی مدل با نتایج تجربی و عددی برای خروجی، مطابقت دارد. همچنین، شرایط بهینه برای کمترین تغییر ضخامت و بیشترین میزان تغیرشکل دائمی ورق ارائه شد. | ||
| کلیدواژه‌ها | ||
| انفجار زیرآب؛ بارگذاری مکرر؛ شکلدهی ورق؛ شبیه‌سازی عددی؛ بهینهسازی | ||
| عنوان مقاله [English] | ||
| Optimization of Effective Parameters in Free Iron Sheet Forming Process by Underwater Explosion Method | ||
| نویسندگان [English] | ||
| Sadegh Nasiri1؛ Milad Sadegh Yazdi2؛ 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 | ||
| چکیده [English] | ||
| 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. | ||
| کلیدواژه‌ها [English] | ||
| Underwater explosion, Repeated Loading, Sheet forming, Numerical simulation, Optimization | ||
| مراجع | ||
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