دانلود رایگان مقاله لاتین بهینه سازی لوله پر شده با فوم از سایت الزویر
عنوان فارسی مقاله:
بهینه سازی لوله های بیضی شکل پر شده با فوم دوبل تحت بارگذاری چندگانه
عنوان انگلیسی مقاله:
Optimization of foam-filled double ellipse tubes under multiple loading cases
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
By development of technology, the number of vehicles and their speed have increased and the possibility of car crashes and human injuries has increased as a result. Therefore, the researchers focus more attention to the crashworthiness of the vehicle safety. At the same time, the fuel consumption is another aspect on the designing of the vehicle which could not be ignored. Thus, to improve the energy absorption of a material, the thin walled structures have been applied in many cases, especially thin walled tubes. Superior energy absorption capability of thin-walled tubes lays in the progressive and controllable plastic deformation modes. Extensive research efforts were conducted to investigate the crushing behavior of thin-walled tubes under quasi-static and dynamic loading [1]. To enhance energy absorption without much increase in mass, cellular materials or structures including metallic foams [2–8], synthetic foams [9–12], natural cellular materials [13] and honeycombs [14] are used to fill the tubes. Some other research focus on the multi-tube usage [14–18] and generating corrugated/grooved surfaces on the tubes. To predict the crashworthiness of the thin walled tubes, Hanssen et al. [19,20] presented the close-form formulas to predict the behaviors of foam-filled aluminum tubes under both quasi-static and dynamic loading conditions. They showed that the total energy absorption of a foam-filled tube exceeded the sum of individual energies absorbed in empty column and form filler due to the interaction between foam and column wall. Recently, considering the crashing performance of the vehicle in real world, the deformation mode of the tubes under the oblique loading has been analyzed and some novel structures are proposed. The crush behavior of mild steel square columns was analyzed by Han and Park [21], indicating that from the axial to the bending collapse mode, there was a critical load angle at the transition place. Li et al. [22] paid attention to the aluminum foam circular tubes and did some experiments. As for the tapered tubes, the tapered rectangle tubes had more advantages than straight tubes under an oblique impact has been concluded by Nagel and Thambiratnam [23–25]. To make more effective use of various foam-filled thin-wall structure systems, some researchers [26,27] attempted to simultaneously optimize foam density and wall thickness to seek best possible combination for enhancing crashworthiness. Meanwhile, the double tubes gains increasing attention from the researchers due to the advantages on the crashworthiness under both axial and oblique impact. Goel [3] compared the energy absorption of empty and Al foam filled bi-tubular and tri-tubular configurations to empty and foam-filled single circular and square tubes numerically. The results revealed that energy absorption capacity of Al foam-filled bi-and tri-tubular structures were higher in contrast to single foam-filled tubes. Guo et al. [28] investigated the crashworthiness of double circular tubes under bending conditions using experimental and numerical testing, which indicates the superiority of the ability absorbing the energy. Experimental and finite element analyses were performed on bitubular square thin-walled tubes with different arrangements under quasistatic axial compression loading by Kashani [29], and the effect of length difference in inner and outer tubes was studied.
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کلمات کلیدی:
Optimization of foam-filled double ellipse tubes under multiple loading ... zoodyab.ir/.../97155-optimization-of-foam-filled-double-ellipse-tub... - Translate this page In this paper, a novel foam-filled double ellipse tube (F-DET) is proposed. First, the circle and ellipse tubes with three different configurations(hollow, foam-filled, ... Multi-objective optimization of a tapered elliptical tube under oblique ... journals.sagepub.com/doi/abs/10.1177/0954407017690963 by Q Gao Crashworthiness optimization design of foam-filled tapered thin-walled .... Optimization of foam-filled double ellipse tubes under multiple loading cases. Crashworthiness analysis and multiobjective optimization for circular ... journals.sagepub.com/doi/pdf/10.1177/1687814017696660 by S Yao - 2017 tures, such as circular, square, foam-filled and wind- owed,1 and surface-grooved ... characteristics of double functionally graded tubes and found that it possessed ..... optimization of foam- filled ellipse tubes under oblique impact loading. Thin. Multi objective optimization of foam-filled circular tubes for quasi-static ... www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-78252015000601126 by F Djamaluddin - 2015 - Cited by 5 - Related articles Multi-objective crashworthiness design optimization for foam-filled double cylindrical tubes is presented in this paper. The double structures are impacted by a ... Most Cited Thin-Walled Structures Articles - Elsevier https://www.journals.elsevier.com/thin-walled-structures/most-cited-articles It is found that the optimal designs of the MCT tubes are different under ... A series of experiments with double strap steel joints bonded with UHM CFRP .... Crashworthiness optimization design for foam-filled multi-cell thin-walled structures ..... Free vibrations of composite oval and elliptic cylinders by the generalized ...
