کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
779539 1464158 2007 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A comparative study of energy absorption characteristics of foam-filled and multi-cell square columns
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
A comparative study of energy absorption characteristics of foam-filled and multi-cell square columns
چکیده انگلیسی

A comparative study of energy absorption characteristics between foam-filled square columns and multi-cell square columns was conducted by using nonlinear finite element codes LS-DYNA. The columns and the foam were made of the same material aluminum and the thickness of all sidewalls of columns was kept 1.5 mm. Numerical results compared well with theoretical predictions and showed that the energy absorption efficiency of multi-cell columns was about 50–100% higher than that of foam-filled columns. It means that multi-cell columns were more attractive than foam-filled columns and the reason for this was analyzed by a comparison of the collapse modes. Furthermore, a type of pre-crushed trigger was introduced and modeled for multi-cell columns. This type of trigger was found to be effective to eliminate the initial peak force and improve the efficiency of a multi-cell column as an energy absorber.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Impact Engineering - Volume 34, Issue 11, November 2007, Pages 1739–1752
نویسندگان
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