基于构型设计的包装容器缓冲效应数值分析
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摘要
基于材料结构塑性变形能量耗散机理,提出了3种基于构型设计的安全包装容器,并采用Abaqus/Explicit有限元软件针对包装容器不同姿态自由跌落进行了数值模拟,分析了容器结构50 m高度自由跌落正碰、侧碰和斜碰金属靶体的冲击响应.数值结果给出了不同冲击环境下安全包装容器各部件变形及应力分布,讨论了不同结构形式包装容器的冲击缓冲性能.研究表明,3种构型设计的包装容器均能承受50 m高度自由跌落冲击,基于外壁凸起的薄壳结构和低阻抗宽平台应力材料填充方式的缓冲设计方法均能实现对被保护体有效的冲击防护.
Three packaging containers with configuration design were proposed according to material plastic deformation and energy dissipation theory. Numerical simulations of packaging container dynamic behavior under several drop conditions were carried out using finite element analysis software Abaqus/Explicit. Drop altitudes of normal, transverse and oblique impact were taken into account, and the drop height was 50 meters in the simulations. Stress and deformation distribution of container subjected to different impact cases were gained. Impact cushion properties of the three containers were discussed. The numerical results indicate the containers with configuration design can withstand the impact of 50 m free fall. Thin shell bulge and wide plateau stress are mainly energy dissipation ways for cushion material. It will help improve protected object's safety under impact environment.
Three packaging containers with configuration design were proposed according to material plastic deformation and energy dissipation theory. Numerical simulations of packaging container dynamic behavior under several drop conditions were carried out using finite element analysis software Abaqus/Explicit. Drop altitudes of normal, transverse and oblique impact were taken into account, and the drop height was 50 meters in the simulations. Stress and deformation distribution of container subjected to different impact cases were gained. Impact cushion properties of the three containers were discussed. The numerical results indicate the containers with configuration design can withstand the impact of 50 m free fall. Thin shell bulge and wide plateau stress are mainly energy dissipation ways for cushion material. It will help improve protected object's safety under impact environment.
引文
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[2] Teng C K,Hsiao C Y,Wang C S.Effects of an absorber on impact characteristics in machine cushion design with area ratio modified guiding structure[J].Simulation Modelling Practice & Theory,2008,16(9):1200-1214.
[3] Ruiz-Herrero J L,Rodríguez-Pérez M A,Saja J A D.Design and construction of an instrumented falling weight impact tester to characterise polymer-based foams[J].Polymer Testing,2005,24(5):641-647.
[4] Kawahara S,Muro T.Effects of dry density and thickness of sandy soil on impact response due to rockfall[J].Journal of Terramechanics,2006,43(3):329-340.
[5] Kanahashi H,Mukai T,Yamda Y,et al.Experimental study for the improvement of crashworthiness in AZ91 magnesium foam controlling its microstructure[J].Materials Science & Engineering A,2001,308(1-2):283-287.
[6] Ochelski S,Gotowicki P.Experimental assessment of energy absorption capability of carbon-epoxy and glass-epoxy composites[J].Composite Structures,2009,87(3):215-224.
[7] 卢富德,高德.考虑蜂窝纸板箱缓冲作用的产品包装系统跌落冲击研究[J].振动工程学报,2012,25(3):335-341.Lu Fude,Gao De.Study on drop impact of packaging system considering the cushioning action of honeycomb paperboard box[J].Journal of Vibration Engineering,2012,25(3):335-341.(in Chinese)
[8] 刘壮,高德.基于有限元玉米秸秆纤维缓冲包装材料性能分析[J].包装工程,2010,31(9):46-49.Liu Zhuang,Gao De.Investigation of cushioning performance produced by corn stalk fibers based on the finite element analysis[J].Packaging Engineering,2010,31(9):46-49.(in Chinese)
[9] 郭彦峰,付云岗,许文才,等.缓冲包装件的运输包装性能测试与评估技术[J].包装工程,2006,27(4):26-28.Guo Yanfeng,Fu Yungang,Xu Wencai,et al.Performance test and evaluation technology for transport packaging[J].Packaging Engineering,2006,27(4):26-28.(in Chinese)
[10] 徐鹏,范锦彪,祖静.高g值冲击下存储测试电路模块缓冲保护研究[J].实验力学,2005,20(4):610-614.Xu Peng,Fan Jinbiao,Zu Jing.The buffer of on-board test circuit module in high g shock[J].Journal of Experimental Mechanics,2005,20(4):610-614.(in Chinese)
[11] 郭婷,王跃方.仿甲壳虫芯柱的缓冲吸能结构[J].工程力学,2011,28(2):246-251,256.Guo Ting,Wang Yuefang.Energy absorbing structures imitating trabecular of beetle cuticles[J].Engineering Mechanics,2011,28(2):246-251,256.(in Chinese)
[12] Oh S Y.Effect of residual stress on impact damage in a dissimilar laminated plate at a biaxial bending mode[J].International Journal of Automotive Technology,2008,9(3):347-352.
[13] Lee S,Hahn C,Rhee M,et al.Effect of triggering on the energy absorption capacity of axially compressed aluminum tubes[J].Materials & Design,1999,20(1):31-40.
[14] Kim D K,Lee S.Impact energy absorption of 6061 aluminum extruded tubes with different cross-sectional shapes[J].Materials & Design,1999,20(1):41-49.
[15] 王俊丽,陈喜春.缓冲包装的跌落仿真[J].包装工程,2007,28(9):8-10.Wang Junli,Chen Xichun.Drops simulation of cushion packaging[J].Packaging Engineering,2007,28(9):8-10.(in Chinese)