کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5016297 1464965 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The imperfection-sensitivity of origami crash boxes
ترجمه فارسی عنوان
حساسیت ناقص جعبه های سقوط اریگامی
کلمات کلیدی
جعبه سقوط اوریگامی، جذب انرژی، خرد کردن محوری ناقص،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی
A novel thin-walled tube, named as origami crash box, is recognized as a promising energy absorption device. Experimental results reveal that unintentional imperfection could trigger the symmetric mode with low mean crushing force rather than a high-performance mode, known as complete diamond mode. Therefore, the imperfection-sensitivity of origami crash boxes is investigated in this paper. Appropriate geometric imperfection which is regarded as a substitution of the real defect is introduced into finite element models to trigger the symmetric mode. Numerical simulation shows that the specific energy absorption SEA declines with the increase in imperfection amplitudeAi. And a critical value of ratio Ai/t that is just able to trigger the symmetric mode is obtained. A detailed parametric analysis indicates that a suitable geometry is beneficial to improve the compliance of origami crash box, leading to stable collapse behavior with higher performance in terms of energy absorption. Moreover, a bulkhead reinforced origami crash box is proposed as a low imperfection-sensitivity energy absorption device. And an optimal wall thickness ratio t1/t is obtained through numerical analysis.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Mechanical Sciences - Volume 121, February 2017, Pages 58-66
نویسندگان
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