مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

بررسی تجربی و عددی عملکرد کامپوزیت پلی اتیلن با جرم ملکولی بالا در مقابل برخورد پرتابه با سرعت بالا

نوع مقاله : پژوهشی اصیل

نویسندگان
1 دانشیار، مرکز تحصیلات تکمیلی، دانشگاه علوم و فنون هوایی شهید ستاری، تهران، ایران
2 کارشناسی ارشد هوافضا- سازه، دانشگاه علوم و فنون هوایی شهید ستاری، تهران، ایران
3 دانشجو دکتری، مرکز تحصیلات تکمیلی، دانشگاه علوم وفنون هوایی شهید ستاری، تهران، ایران
4 مربی، دانشکده مهندسی هوافضا، دانشگاه علوم وفنون هوایی شهید ستاری، تهران، ایران
چکیده
الیاف پلی اتیلن با جرم ملکولی بالا از قوی­ ترین و سبک ترین الیاف موجود هستند که به طور گسترده در کاربرد‌های بالستیک با عملکرد بالا استفاده می­ شود. با وجود پیشرفت زیاد توان محاسباتی در سال­های اخیر، به دلیل پیچیدگی رفتار شکست الیاف این کامپوزیت در اثر ضربه، محاسبات دقیقی برای شناسایی آسیب این الیاف انجام نشده است. در این پژوهش با استفاده از پیشرفته‌ترین روش مدل­سازی المان محدود کامپوزیت­ها (آباکوس- صریح) برای مطالعه رفتار الیاف این کامپوزیت در اثر برخورد پرتابه با سرعت بالا استفاده شده است. برای پوسته و تقویت کننده‌ها از المان جامد و برای تعیین رفتار ماده از معیار آسیب هاشین سه بعدی استفاده شده است. به دلیل عدم وجود این معیار در نرم­افزار آباکوس و اهمیت استفاده از آن، این معیار توسط زیربرنامه وی­یومت و کدنویسی در محیط فرترن به قابلیت آباکوس اضافه شده است. نمودار‌های تغییر سرعت و وقوع و گسترش خرابی گزارش شده­اند. برای ارزیابی و اعتبارسنجی این روش، 6 نمونه پنل کامپوزیتی پلی اتیلن با جرم ملکولی بالا به ترتیب با تعداد 20 و 45 لایه ساخته شد و این پنل‌های کامپوزیتی مورد برخورد پرتابه سرعت بالا با سرعت‌های مختلف قرار گرفتند. در ادامه نتاج حاصل از شبیه سازی با نتایج تجربی مقایسه شد که نتایج حاصل از شبیه­ سازی توافق بسیار خوبی را با نتایج تجربی نشان می‌دهند.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Ballistic Performance Analysis of Ultra High Molecular Weight Polyethylene (UHMWPE) Composite

نویسندگان English

Hamidreza Zarei 1
Payam Shahnazar 2
Mohammad Meskini 3
Reza Sarkhosh 4
1 Associate Professor, Graduate Center, Aeronautical University of Science and Technology, Tehran, Iran
2 MSc of Aerospace-Structure, Aeronautical University of Science and Technology, Tehran, Iran
3 Phd Student of Mechanics, Graduate Center, Aeronautical University of Science and Technology, Tehran
4 Instructor, Faculty of Aerospace Engineering, Aeronautical University of Science and Technology, Tehran, Iran
چکیده English

Ultra-High molecular weight polyethylene (UHMWPE) fibers are among the strongest and lightest fibers available and are widely used in high-performance ballistic applications. Despite the great advancement of computational analysis in recent years, precise calculations have not been performed to identify the failure of these fibers due to the complexity of the material behavior to impact. In this research, using the most advanced finite element modeling method of composites (Abaqus-Explicit) has been used to study the composite behavior of these fibers subjected to high-velocity projectile impact. Fiber and matrix are designed using solid elements and 3D Hashin failure criterion was used to determine the behavior of the material. Since this criterion is not available in Abaqus, the VUMAT subroutine has been used to implement this criterion. Velocity diagrams and damage evaluation have been reported. To evaluate and validate this method, six samples of Ultra High Molecular Weight Polyethylene (UHMWPE) Composite panels, consisting of 20 and 45 layers, respectively, were experimentally studied by high-velocity projectiles at different velocities. The simulation results are in good agreement with the experimental results.

کلیدواژه‌ها English

High velocity impact
Composite
VUMAT
Finite element
Ultra High Molecular Weight Polyethylene (UHMWPE)
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