Transactions of Materials and Heat Treatment

Title：Research on simulation of high speed impact absorbing energy characteristics in five-cell thin-wall structure with thickness gradient

Authors： Liu Sheng Zheng Gang Wu Suzhen Xu Fengxiang

Unit： Hunan University Wuhan University of Technology Hubei Collaborative Innovation Center for Automotive Components Technology

KeyWords： multi-cell structure thickness gradient axial impact crashworthiness

ClassificationCode：TG302

year,vol(issue):pagenumber：2015,40(11):94-99

Abstract：

It was mainly studied the crashworthiness of multi-cell thin-wall structure with the thickness gradient under axial impact load. The finite element model of the five-cell thin-wall structure with uniform thickness was established and its effectiveness was validated by experiments. Finally, the peak impact force (PCF) and specific energy absorption (SEA) were regarded as the evaluation indexes, and the influences of the thickness gradient and the equivalent thickness on the crashworthiness of five-cell thin-wall structure with the thickness gradient were analyzed. The results show that compared with the multi-cell structure with a uniform thickness, the crashworthiness under axial impact load for multi-cell structure with the positive thickness gradient is more obviously. Therefore, under the condition of given structure mass, the reasonable material distribution makes the wall thickness in cross section of multi-cell structure varies along a linear gradient, and the crash energy absorption characteristic of multi-cell thin-wall structure can gain a further improvement.

Funds：

国家自然科学基金资助项目(11102067）

刘胜（1988-），男，硕士研究生

Reference：

［1］Zhang Y,Zhu P,Cheng L.Lightweight design of automotive front side rail based on robust optimization[J].Thin-walled Structures，2007，45：670-676.
［2］Chen W, Wierzbicki T. Relative merits of single-cell multi-cell and foam-lled thin-walled structures in energy absorption[J]. Thin-walled Structures，2001，39:287-306.
［3］周鑫美，饶建强.多胞结构在汽车前纵梁中的应用研究[J].机械制造，2010，48(545)：37-39．Zhou X M, Rao J Q. Application in the automobile front longeron study of the cellular structure [J]. Machine Manufacture, 2010, 48(545):37-39.
［4］Kim H S. New extruded multi-cell aluminum profile for maximum crash energy absorption and weight efficiency [J]. Thin-walled Structures，2002，40:311-327.
［5］Zhang X, Wen Z Z, Zhang H. Axial crushing and optimal design of square tubes with graded thickness[J].Thin-walled Structures,2014，84:263-274.
［6］Sun G Y,Tian X Y,Fang J G, et al.Dynamical bending analysis and optimization design for functionally graded thickness (FGT) tube[J].International Journal of Impact Engineering,2015，78:128-137.
［7］张雄.轻质薄壁管结构耐撞性分析与优化设计[D].大连：大连理工大学,2007. Zhang X. Light Thin Wall Pipe Structure Crashworthiness Analysis and Optimization Design [D].Dalian: Dalian University of Technology,2007.
［8］朱浩，朱亮，陈剑虹.应力三轴度和应变率对6063铝合金力学性能的影响及材料表征[J].材料科学与工程学报，2007,25(3):358-362.Zhu H, Zhu L, Chen J H. Triaxial stress degree and the effect of strain rate on the mechanical properties of 6063 aluminum alloy and material characterization [J]. Materials Science and Engineering,2007,25(3):358-362.
［9］Ahmad Z, Thambiratnam D P. Dynamic computer simulation and energy absorption of foam-filled conical tubes under axial impact loading[J]. Comput. Struct.，2009, 87(3-4): 186-197.

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