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A New Method to Fabricate Bulk PCMs from Continuous Wires and the Mechanical Behaviors

연속된 와이어를 이용한 다층 PCM의 제조방법 및 특성 평가

  • 이용현 (전남대학교 대학원 기계공학과) ;
  • 최지은 (전남대학교 자동차연구소) ;
  • 전인수 (전남대학교 기계시스템 공학부) ;
  • 강기주 (전남대학교 기계시스템 공학부)
  • Published : 2007.02.01

Abstract

Since the new millennium, truss PCMs(Periodic Cellular Metals) have drawn attention because of their superior specific stiffness, strength and multi-functionality. Prior studies have focused on the structural design and optimization. Kagome truss PCM has been proved to have the higher resistance to plastic buckling, more plastic deformation energy and lower anisotropy than other truss PCMs. In this study, we introduce a new idea to fabricate multi-layered Kagome truss PCM from continuous wires which can gain high strength as in piano wires and can be controlled to be defect free owing to drawing process. The relative density, the stiffness and the strength under bending and compressive load are estimated through elementary mechanics and compared with the results from experiments and FEA. The failure mechanisms are analyzed, and also mechanical performance and production are discussed.

Keywords

Kagome Truss;Sandwich Panel;PCM(Periodic Cellular Metal);Three Dimensional Weaving

References

  1. Chiras, S., Mumm, D. R., Wicks, N., Evans, A. G., Hutchinson, J. W., Dharamasena, K. Wadley, H. N. G. and Fichter, S. 2002, 'The Structural Performance of Near-Optimized Truss Core Panels,' International Journal of Solids and Structures, Vol. 39, pp. 4093-4115 https://doi.org/10.1016/S0020-7683(02)00241-X
  2. Sypeck, D. J. and Wadley, H. N. G., 2001, 'Cellular Metal Truss Core Sandwich Structures,' Proceedings of the 2nd International Conference on Cellular Metals and Metal Foaming Technology (MetFoam 2001) Edited by Banhart J., Ashby M. F., Fleck N. A., pp. 381-386
  3. Sypeck, D. J. and Wadley, H. N. G., 2001, 'Multifunctional Microtruss Laminates: Textile Synthesis and Properties,' J. Mater. Res. Vol. 16, pp. 890-897 https://doi.org/10.1557/JMR.2001.0117
  4. Kang Ki-Ju, Jeon Gye-Po, Nah Seong-Jun, Ju Boseong and Hong Nam-Ho, 2004, 'A New Way to Manufacture Ultra Light Metal Structures,' J. of the Korean Society of Mechanical Engineers, Vol. A-28, pp. 296-303
  5. Kang Ki-Ju, Lim Ji-Hyun, Nah Seong-Jun and Koo Man-Hoe, 2005, 'Compressive and Bending Behavior of Sandwich Panels with Octet Truss Core Fabricated from Wires,' J. of the Korean Society of Mechanical Engineers, Vol. A-29, pp. 470-476 https://doi.org/10.3795/KSME-A.2005.29.3.470
  6. Deshpande V. S., Fleck N. A., Ashby M. F., 2001, 'Effective Properties of the Octet-Truss Lattice Material,' J. of the Mechanics and Physics of Solids, Vol. 49, pp. 1747-1769 https://doi.org/10.1016/S0022-5096(01)00010-2
  7. Howard G. Allen, 1969, Analysis and Design of Structural Sandwich Panels 1st ed, Pergamon Press
  8. Ugural, A. C. and Fenster, S. K., 2003, 'Advenced Strength and Applied Elasticity , 4th Ed,' Preutice-Hall, pp. 406
  9. Ashby, M. F., Evans, A. G., Fleck, N. A., Gibson, L. J., Hutchison, J. W. and Wadley, H. N. G. 2001, Metal Foams: A Design Guide, Butterworth Heinemann
  10. Zupan, M., Deshpande, V. S., Fleck, N. A., 2004, 'The Out-of-Plane Compressive Behaviour of Woven- Core Sandwich Plates,' Euro J. Mech. A/Solids, Vol. 23, pp. 441-421 https://doi.org/10.1016/j.euromechsol.2004.01.007
  11. Hyun, S., Karlsson, A. M., Torquato, S. and Evans, A. G., 2003, 'Simulated Properties of Kagome and Tetragonal Truss Core Panel,' Int. J. Solids and Structures, Vol. 40, pp. 6989-6998 https://doi.org/10.1016/S0020-7683(03)00350-0
  12. Bleich, F., 1952, Buckling Strength of Metal Structures, McGraw-Hill, p. 14
  13. James M. Gere, 2001, Mechanics of Material 5th ed, Brooks/cole