Chinese Journal of Theoretical and Applied Mechani ›› 2009, Vol. 41 ›› Issue (2): 274-281.DOI: 10.6052/0459-1879-2009-2-2007-400

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Mechanical behavior of 2d periodic honeycombs under in-plane uniaxial compression

Bo Wang Xiong Zhang Shengli Xu   

  • Received:2007-08-29 Revised:2008-01-04 Online:2009-03-25 Published:2009-03-25

Abstract: In the present study, polyvinylchloride (PVC) and polypropylene (PP) ``based honeycomb structures with different inner cell topologies, such as Kagome, Triangle and Diamond, are fabricated with the ``Strip slotting- Assembling-Welding'' technique. The quasi-static crush behaviors under in-plane compression are experimentally investigated for Kagome, Triangle and Diamond cell structures. The Charge Couple Devices (CCD) camera and digital image correlation (DIC) method are applied to obtain the the whole strain-field of the structures. Experimental results suggest that the energy absorption performance of Kagome structure is superior to others with the same materials volume and structural sizes. In addition, a special rotation deformation mechanism of Kagome honeycomb structures is addressed. Moreover, numerical analyses of Kagome and Triangle cells under low velocity impact are studied in comparison with the results from the known Hexagonal cells. The numerical results show that the Kagome cells with the rotation deformation behavior have better energy absorption performance than triangle and hexagonal cells. Both experimental and numerical results indicate great sensitivity of the local honeycomb morphology to deformation and energy absorption.

Key words: Kagome, honeycomb structure, energy absorption, mechanical characteristic, deformation behavior