بررسی عددی و تجربی جذب انرژی سازه مخروط ناقص چندلایه آلومینیوم- کامپوزیت تحت بارگذاری محوری

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده مهندسی مکانیک، دانشگاه خواجه نصیر، تهران، ایران

2 گروه پژوهشی نیروهای تجدید پذیر، پژوهشگاه نیرو، تهران، ایران

چکیده

ایمنی غیرعامل مهم‌ترین بخش محافظت از جان سرنشینان در تصادفات و برخوردها در موضوع ایمنی خودروهاست. جعبه تصادف یکی از اساسی‌ترین بخش‌های ایمنی غیرعامل در خودرو است و انتظار بر این است که توانایی جذب انرژی جنبشی در تصادفات طولی را داشته باشد تا بتواند در محدوده‌ای ایمن، آسیب به سرنشینان را به حداقل برساند. با وجود به کارگیری انواع اشکال هندسی و مواد در ساخت جعبه تصادف، سازه‌های مخروطی و آلومینیوم توجه‌های بسیاری را به خود جلب کرده‌اند. در این پژوهش سازه‌های مخروطی آلومینیومی و آلومینیوم-کامپوزیت تحت بارگذاری شبه استاتیک در آزمایش تجربی و شبیه‌سازی عددی بررسی شد که نتایج حاکی از افزایش تا سه برابری جذب انرژی ویژه، نیروی حداکثر و نیروی میانگین سازه‌های آلومینیومی با به کارگیری الیاف شیشه– اپوکسی در تقویت سازه آلومینیومی بود. الیاف شیشه- اپوکسی علاوه بر خواص مکانیکی خود به دلیل زوایای لایه چینی 0 و 90 توانستند عملکردی عالی در پوشش نقایص ساخت سازه آلومینیومی و راهنمایی مقطع به مقطع تخریب از خود نشان دهند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Numerical and Experimental Study Of Energy Absorption of Multi-Layer Aluminum-Composite Conical Frustum Structures under Axial Loading

نویسندگان [English]

  • Afshin Tafazoli 1
  • Masood Asgari 1
  • Aidin Ghaznavi 2
1 Faculty of Mechanical Engineering, K.N. Toosi University of Technology, Tehran, Iran
2 Professor (Assistant), Niroo Research Institute (NRI), Tehran, Iran
چکیده [English]

Passive safety is the most important part of protecting the lives of occupants in accidents and collisions when it comes to vehicle safety. The crash box is one of the most basic passive safety components in the vehicle and is expected to be able to absorb kinetic energy in longitudinal crashes in order to minimize occupant injury in safe areas. Despite the use of a variety of geometric shapes and materials in the construction of crash boxes, conical structures and aluminum have attracted much attention. In this study, aluminum and aluminum-composite conical structures were investigated. Under quasi-static loading, experimental experiments and numerical simulations showed that the addition of composite to aluminum structures could triple the specific energy absorption of the structure on average. And the use of 0 and 90 directions of glass-epoxy fibers advances the process of structural destruction step by step and cross-sectional. The result is that the folds are regular and close together, which has positive effects on specific energy absorption, mean force, and stroke efficiency of the structure.

کلیدواژه‌ها [English]

  • Energy absorption
  • Crash box
  • Conical frustum structures
  • Aluminum-composite
  • FML cone energy absorption

مراجع

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نشریه مهندسی مکانیک امیرکبیر
دوره 54، شماره 8
آبان 1401
صفحه 1851-1866

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