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بررسی تجربی و عددی پنل‌های ساندویچی با هسته موجدار ذوزنقه‌ای شکل، تحت بارگذاری انفجاری مایل | ||
| مکانیک هوافضا | ||
| مقاله 2، دوره 19، شماره 2 - شماره پیاپی 72، شهریور 1402، صفحه 11-23 اصل مقاله (994.53 K) | ||
| نوع مقاله: مکانیک ضربه | ||
| نویسندگان | ||
| هادی محمدی هویه1؛ علیرضا نداف اسکوئی* 2؛ توحید میرزابابای مستوفی3؛ خداداد واحدی4 | ||
| 1دانشجوی دکتری، دانشکده فنی و مهندسی، دانشگاه جامع امام حسین(ع)، تهران، ایران | ||
| 2نویسنده مسئول: دانشیار، دانشکده فنی و مهندسی ، دانشگاه جامع امام حسین(ع)، تهران، ایران | ||
| 3استادیار، دانشکده مهندسی مکانیک، دانشگاه ایوانکی، ایوانکی، ایران | ||
| 4استاد، دانشکده فنی و مهندسی، دانشگاه جامع امام حسین(ع)، تهران، ایران | ||
| تاریخ دریافت: 05 مهر 1401، تاریخ بازنگری: 17 مهر 1401، تاریخ پذیرش: 13 آذر 1401 | ||
| چکیده | ||
| در این تحقیق به بررسی حل تجربی و عددی پنل‌های ساندویچی ST37با هسته موجدار ذوزنقه‌ای شکل تحت انفجار مایل پرداخته‌شده است. هسته پنل باضخامت ورق 7/0 میلی‌متر به کمک عملیات خم‌کاری و ورق‌های رویی و پشتی به ضخامت 1 میلی‌متر و طول و عرض 270 میلی‌متر تهیه گردیده است. به‌منظور انجام انفجار مایل، لوله‌های انفجاری در زوایای صفر (موازی پنل هدف)، 15، 30 و 45 درجه نسبت به پنل هدف بافاصله استقرار خرج ثابت 300 میلی‌متر تهیه گردیده است. از ماده منفجرهC4 با جرم ثابت 10 گرم در پروسه‌های انفجار استفاده گردیده است. در ادامه به کمک نرم‌افزار تجاری آباکوس و با استفاده از تکنیک کوپل اویلری – لاگرانژی به حل عددی مسئله پرداخته‌شده است. با مقایسه نتایج حل عددی و تجربی قرابت مناسبی بین آن‌ها مشاهده می‌گردد. نتایج نشان می‌دهد که با افزایش زاویه شیب خرج نسبت به پنل هدف از صفر تا 45 درجه، مقادیر تغییرشکل نقطه میانی، کاهش می‌یابد. در جرم خرج‌های بزرگ‌تر، این کاهش تغییرشکل نسبت به جرم خرج‌های کوچک‌تر بیشتر خواهد بود. همچنین به دلیل هدایت بخش زیادی از موج انفجار به خارج از لوله انفجاری میزان انرژی مستهلک‌شده پلاستیک برای جرم خرج با زاویه 45 درجه کاهش قابل‌توجهی نسبت به سایر زاویه‌ها دارد. | ||
تازه های تحقیق | ||
| ||
| کلیدواژه‌ها | ||
| هسته موجدار؛ پنل ساندویچی؛ انفجار مایل؛ روش کوپل اویلری-لاگرانژی | ||
| عنوان مقاله [English] | ||
| Experimental and Numerical Investigation of Trapezoidal Corrugated Core Sandwich Panels Under Oblique Blast Loading | ||
| نویسندگان [English] | ||
| Hadi Mohammadi Hooyeh1؛ Alireza Naddaf Oskouei2؛ Tohid Mirzababaie Mostofi3؛ Khodadad Vahedi4 | ||
| 1Ph.D. Student, Faculty of Engineering, Imam Hossein University, Tehran, Iran | ||
| 2Corresponding author: Associate Professor, Faculty of Engineering, Imam Hossein University, Tehran, Iran | ||
| 3Assistant Professor, Faculty of Mechanical Engineering, University of Eyvanekey, Eyvanekey, Iran | ||
| 4Professor, Faculty of Engineering, Imam Hossein University, Tehran, Iran | ||
| چکیده [English] | ||
| This study deals with experimental and numerical response of trapezoidal corrugated core sandwich panels made of ST37 subjected to oblique blast loading. Sandwich target plate is 270*270 mm that consist of front/ back plate with 1 mm and trapezoidal corrugated core with 0.7mm thickness. The experimental explosive was done at the end of four different blast tube with angle of 0°, 15°, 30° and 45°respect to sandwich target plate. The mass of explosive (C4) was 10g and the stand-off distance was constant at 300 mm. The results of numerical simulation, obtained using coupled Eulerian–Lagrangian (CEL) model at commercial ABAQUS/Explicit software. The results show good agreement between the numerical and the experimental values. The results show that with increasing angle of tilt from 0° up to 45°, the maximum displacement decreases. At the higher masses of explosive, this reduction in deformation will be greater than the lower masses of explosive. Also, due to directing a large part of the blast wave to out of the blast tube, the amount of plastic dissipation energy at the angle of 45 degrees is significantly reduced compared to other angles. | ||
| کلیدواژه‌ها [English] | ||
| Corrugated core, Sandwich panels, Oblique blast loading, Coupled Eulerian&ndash, Lagrangian method | ||
| مراجع | ||
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آمار تعداد مشاهده مقاله: 140 تعداد دریافت فایل اصل مقاله: 304 |
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