Mechanism of cell configuration affecting dynamic mechanical properties of metal honeycombs

Hu Ling-ling; Jiang Ling

doi:10.11883/1001-1455(2014)01-0041-06

Volume 34 Issue 1

Mar. 2014

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Hu Ling-ling, Jiang Ling. Mechanism of cell configuration affecting dynamic mechanical properties of metal honeycombs[J]. Explosion And Shock Waves, 2014, 34(1): 41-46. doi: 10.11883/1001-1455(2014)01-0041-06

JIANG Dong, LI Yong-chi. Numericalsimulationofadiabaticshearinbluntnoseprojectilepluggingtarget[J]. Explosion And Shock Waves, 2011, 31(1): 1-5. doi: 10.11883/1001-1455(2011)01-0001-05

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Mechanism of cell configuration affecting dynamic mechanical properties of metal honeycombs

doi: 10.11883/1001-1455(2014)01-0041-06

Hu Ling-ling^,,
Jiang Ling

Department of Applied Mechanics and Engineering, School of Engineering, Sun Yat-sen University, Guangzhou 510275, Guangdong, China

Funds: Supported by the National Natural Science Foundation of China (11172335, 10802100)

Received Date: 2012-08-20
Rev Recd Date: 2012-11-17
Publish Date: 2014-01-25

Abstract

Abstract

The in-plane dynamic behaviors of metal honeycombs filled by cells with various configurations and arrangements are studied by the finite element method using ANSYS/LS-DYNA.The deformation modes, crushing strength and energy-absorption ability are compared among these honeycombs while controlling their relative density and the impact velocity as uniform.It is shown that different cell configurations result in different stress states within the cell walls during the cells'collapse process, which thus influence the macroscopic mechanical properties of the honeycombs.According to the cell-walls'stress state, the involved honeycombs are divided into tow groups:membrane-dominated honeycombs and bending-dominated honeycombs.The results show that most of the absorbed energy of the honeycomb is transferred into the internal energy needed by the deformation.The percentage of the internal energy to the total absorbed energy is much more for the membrane-dominated honeycombs.The buckling of the cell-walls results in obvious oscillation in the stress-strain curves of the membrane-dominated honeycombs.The cell-walls in the membrane-dominated honeycombs will dissipate more internal energy during deformation, resulting in higher crushing strength and higher energy absorption ability than those of the bending-dominated ones.
- solid mechanics,
- energy absorption,
- impact,
- honeycomb,
- cell configuration,
- crushing strength

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References(12)

References

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