کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7173206 | 1464087 | 2014 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Crashing analysis and multiobjective optimization for thin-walled structures with functionally graded thickness
ترجمه فارسی عنوان
تجزیه و تحلیل توفنده و بهینه سازی چند هدفه برای ساختارهای نازک دیواره با ضخامت عملکردی درجه بندی شده
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
چکیده انگلیسی
Thin-walled structures have exhibited significant advantages in light weight and energy absorption and been widely applied in automotive, aerospace, transportation and defense industries. Unlike existing thin-walled structures with uniform thickness, this paper introduces functionally graded structures with changing wall thickness along the longitudinal direction in a certain gradient (namely, functionally graded thickness - FGT). Its crashing behaviors are the key topics of the present study. We examine the crashing characteristics of functionally graded thin-walled structures and evaluate the effect of different thickness gradient patterns on crashing behaviors. It is shown that the gradient exponent parameter n that controls the variation of thickness has significant effect on crashworthiness. To optimize crashworthiness of the FGT tubes, the Non-dominated Sorting Genetic Algorithm (NSGA-II) is used to seek for an optimal gradient, where a surrogate modeling method, specifically response surface method (RSM), is adopted to formulate the specific energy absorption (SEA) and peak crashing force functions. The results yielded from the optimization indicate that the FGT tube is superior to its uniform thickness counterparts in overall crashing behaviors. Therefore, FGT thin-walled structures are recommended as a potential absorber of crashing energy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Impact Engineering - Volume 64, February 2014, Pages 62-74
Journal: International Journal of Impact Engineering - Volume 64, February 2014, Pages 62-74
نویسندگان
Guangyong Sun, Fengxiang Xu, Guangyao Li, Qing Li,