بررسی رفتار نفوذ در اهداف تک و چندلایه فلزی تحت ضربه پرتابه

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار، دانشکده مهندسی مکانیک، دانشگاه ایوان کی، گرمسار، ایران

2 گروه مهندسی مکانیک، دانشگاه ایوانکی

3 گیلان*مهندسی مکانیک

چکیده

در این مقاله، به بررسی تجربی و مدل‌سازی رفتار نفوذ ورق‌های تک لایه و چند لایه آلومینیومی، فولادی و یا ترکیبی از فولاد و آلومینیوم تحت ضربه پرتابه کروی صلب پرداخته‌شده است. برای انجام کارهای تجربی در قالب 66 آزمون، هشت نوع لایه‌بندی مختلف در نظر گرفته شد و نمونه‌ها در محدوده سرعت 42 تا 158 متر بر ثانیه تحت ضربه پرتابه قرار گرفتند. این لایه‌بندی‌ها شامل ورق تک لایه آلومینیومی و فولادی باضخامت 2 و 3 میلی‌متر، ساختار دولایه آلومینیومی و فولادی باضخامت کلی 2 میلی‌متر، ساختار سه لایه هم‌جنس آلومینیومی و فولادی باضخامت کلی 3 میلی‌متر و ساختارهای سه لایه غیر هم‌جنس آلومینیوم – فولاد - آلومینیوم و فولاد – آلومینیوم - فولاد باضخامت کلی 3 میلی‌متر بود. در تمامی آزمایش‌ها، سرعت برخورد پرتابه و میزان تغییر شکل پلاستیک نمونه اندازه‌گیری شد. در بخش مدل‌سازی عددی، از شبکه عصبی از نوع دسته‌بندی گروهی داده‌ها برای ارائه یک مدل ریاضی بر مبنای اعداد بی‌بعد جهت پیش‌بینی بیشترین خیز دائمی ساختارهای تک لایه و چندلایه فلزی تحت ضربه پرتابه صلب استفاده شد. نتایج بدست‌آمده نشان داد که توافق خوبی بین مدل ارائه‌شده با مقادیر تجربی برقرار است به‌طوری‌که 94% از نقاط در محدوده خطای کمتر از 10% قرار گرفتند.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Investigation of penetration behavior of monolithic and multi-layered metallic targets subjected to a projectile impact

نویسندگان [English]

  • Tohid Mirzababaie Mostofi 1
  • Mostafa Sayah Badkhor 2
  • Hashem Babaei 3
1 Assistant Professor, Faculty of Mechanical Engineering, University of Eyvanekey, Garmsar, Iran
2 Department of Mechanical Engineering, University of Eyvanekey
3 University of Guilan
چکیده [English]

In the current study, an experimental study and modeling of the penetration behavior of single-layered and multi-layered targets made of either aluminum alloy or mild steel or a combination of these materials impacted by a spherical projectile were introduced. For conducting 66 experiments, eight different layering configurations consist of monolithic aluminum and steel plates with the thickness of 2 mm and 3mm, double-layered aluminum and steel plates with a total thickness of 2 mm, triple-layered aluminum, and steel plates with the total thickness of 3 mm, and triple mixed layered plates of Aluminum-Steel-Aluminum and Steel-Aluminum-Steel configurations with the total thickness of 3 mm were considered under various impact velocities of 42 to 158 m/s. The impact velocity and maximum permanent deflection of specimens were measured in all experiments. In the numerical modeling section, the group method of data handling neural network was used to present a mathematical model based on dimensionless numbers to predict the maximum permanent deflection of monolithic and multi-layered metallic plates under the rigid projectile impact. To increase the prediction capability of the proposed neural network for this process, the experimental data were divided into two training and prediction sets. The results showed that good agreement between the proposed model and the corresponding experimental results is obtained and 94% of data points are within the ±10% error range.

کلیدواژه‌ها [English]

  • Ballistic resistance
  • Multi-layered plates
  • Single-layered plates
  • Neural Network
  • Modeling
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