基于落锤装置的蜂窝铝夹芯结构动力学特性
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摘要
利用实验结合数值计算的方法研究蜂窝铝夹芯结构在受冲击载荷作用时的动力学特性;采用落锤装置对蜂窝铝夹芯结构在受到冲击载荷时的变形进行研究,建立有限元模型,并与实验值进行对比;分析落锤冲击破坏过程中蜂窝铝夹芯结构面板与蜂窝芯子在不同阶段的应力分布,讨论不同冲击速度对蜂窝铝夹芯结构面板凹痕深度与面积的影响,以及实验过程中落锤与试件之间的接触力和能量吸收效果。结果表明,随着落锤冲击速度的增大,面板和蜂窝芯子在最大凹痕深度处的应力峰值逐渐增大,应力波辐射范围增大,蜂窝铝夹芯结构吸收的能量也相应增大。
Dynamic properties of the aluminum honeycomb sandwich structure under impact loading were investigated by combining experiments with numerical modeling. Compared with experiment data,a finite element model was established to study the deformation of the aluminum honeycomb sandwich structure with a drop hammer equipment. The stress distribution of the aluminum honeycomb sandwich structure and honeycomb core at different stages of failure process was analyzed. The influence of different impact velocities on the dent depth and area of the aluminum honeycomb sandwich structure,and the effect of contact force between the hammer and the specimen and the energy absorption in the experiment were discussed. The results show that the stress amplitude of the front plate and the honeycomb core at the maximum dent depth gets larger with increase of the drop hammer speed,the radiation scope of stress wave expands more widely,and the energy absorbed by the aluminum honeycomb sandwich structure increases correspondingly.
Dynamic properties of the aluminum honeycomb sandwich structure under impact loading were investigated by combining experiments with numerical modeling. Compared with experiment data,a finite element model was established to study the deformation of the aluminum honeycomb sandwich structure with a drop hammer equipment. The stress distribution of the aluminum honeycomb sandwich structure and honeycomb core at different stages of failure process was analyzed. The influence of different impact velocities on the dent depth and area of the aluminum honeycomb sandwich structure,and the effect of contact force between the hammer and the specimen and the energy absorption in the experiment were discussed. The results show that the stress amplitude of the front plate and the honeycomb core at the maximum dent depth gets larger with increase of the drop hammer speed,the radiation scope of stress wave expands more widely,and the energy absorbed by the aluminum honeycomb sandwich structure increases correspondingly.
引文
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[2]张广平,戴干策.复合材料蜂窝夹芯板及其应用[J].纤维复合材料,2000,17(2):25-27.
[3]陈勇军,左孝青,史庆南,等.金属蜂窝的开发、发展及应用[J].材料导报,2003,17(12):32-35.
[4]季铁正,王宝山.蜂窝夹芯板的结构与应用[J].新型建筑材料,1995(2):31-33.
[5]WU E,JIANG W S.Axial crush of metallic honeycombs[J].International Journal of Impact Engineering,1997,19(5):439-456.
[6]BAKER W E,TOGAMI T C,WEYDERT J C.Static and dynamic properties of high-density metal honeycombs[J].International Journal of Impact Engineering,1998,21(3):149-163.
[7]HARRIGAN J J,REID S R,PENG C.Inertia effects in impact energy absorbing materials and structures[J].International Journal of Impact Engineering,1999,22(9):955-979.
[8]SCARPA F,TOMLINSON G.Theoretical characteristics of the vibration of sandwich plates with in-plane negative Poisson’s ratio values[J].Journal of Sound and Vibration,2000,230(1):45-67.
[9]BESANT T,DAVIES G A O,HITCHINGS D.Finite element modelling of low velocity impact of composite sandwich panels[J].Composites:A:Applied Science and Manufacturing,2001,32(9):1189-1196.
[10]ZHAO H,GARY G.Crushing behaviour of aluminium honeycombs under impact loading[J].International Journal of Impact Engineering,1998,21(10):827-836.
[11]XIE Z H,VIZZINI A J,TANG Q R.On residual compressive strength prediction of composite sandwich panels after low-velocity impact damage[J].Acta Mechanica Solida Sinica,2006,19(1):9-17.
[12]HAZIZAN M A,CANTWELL W J.The low velocity impact response of an aluminium honeycomb sandwich structure[J].Composites:B:Engineering,2003,34(8):679-687.
[13]RUAN D,LU G,WANG B,et al.In-plane dynamic crushing of honeycombs:a finite element study[J].International Journal of Impact Engineering,2003,28(2):161-182.
[14]DEAR J P,LEE H,BROWN S A.Impact damage processes in composite sheet and sandwich honeycomb materials[J].International Journal of Impact Engineering,2005,32(1):130-154.
[15]CHEN A,DAVALOS J F.A solution including skin effect for stiffness and stress field of sandwich honeycomb core[J].International Journal of Solids and Structures,2005,42(9):2711-2739.