Optimum dimensions of tabular metallic and composite energy absorbers under flattening process

  • سال انتشار: 1394
  • محل انتشار: همایش یافته های نوین در هوافضا و علوم وابسته
  • کد COI اختصاصی: MAARS01_127
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 593
دانلود فایل این مقاله

نویسندگان

Jafar Rouzegar

Department of Aerospace and Mechanical Engineering, Shiraz University Of Technology, P.O. Box

Abbas Niknejad

Mechanical Engineering Department, Faculty of Engineering, Yasouj University,

Seyed Mohammad Elahi

Department of Aerospace and Mechanical Engineering, Shiraz University Of Technology,

Seyed Ali Elahi

Mechanical Engineering Department, Faculty of Engineering, University of Tehran, Tehran, Iran

چکیده

This paper investigates the effects of diameter and side length of metal and composite circular tubes and square columns under lateral compression on the amount of energy absorption capacities to find the optimum dimensions of energy absorbers. For this purpose some empty and polyurethane foam-filled specimens with different cross-sections and materials are tested and the results are compared with each other. Two kinds of polyurethane foam (called type 1 and type 2) were used for filled specimens. Polyurethane foam type 1 has higher density than type 2. Investigations on empty tubes showed that by increasing the diameter and side length, the SAE decreased. Also, investigations on filled tubes showed that for specimens filled by high density foam, by increasing diameter or side length up to a certain value, the specific absorbed energy increased, considerably. But by increasing the diameter or the side length after that, the specific absorbed energy remained almost constant or started to decrease. For square specimens filled by low density polyurethane foam, like empty specimens, SAE decreased by increasing side length.

کلیدواژه ها

مقالات مرتبط جدید

اطلاعات بیشتر در مورد COI

COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.

کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.