Mechanical Behavior of New Thin Sandwich Panel Subjected to Bending

새로운 박판샌드위치 판재의 삼점굽힘거동

  • Lee, Jung-In (School of Mechanical Engineering, Chonnam Nat'l Univ.) ;
  • Kang, Ki-Ju (School of Mechanical Engineering, Chonnam Nat'l Univ.)
  • 이정인 (전남대학교 기계공학부) ;
  • 강기주 (전남대학교 기계공학부)
  • Received : 2012.09.28
  • Accepted : 2012.12.10
  • Published : 2013.04.01


A new thin sandwich panel composed of an aluminum expanded metal core adhesively jointed with stainless steel face sheets is introduced, and its mechanical behavior under three-point bending is investigated. The strength and stiffness are analyzed theoretically, and the press-formability and strength enhancement are evaluated experimentally. The specimens with the specific configurations exhibit face yielding well before face-core separation, which means that the sandwich panel can be formed by a press without failure. The measured load levels corresponding to the face yielding and the face-core separation agree fairly well with the theoretical estimations. For a given weight, the sandwich panel is superior to a solid panel in terms of strength, stiffness, and press-formability.


Sandwich Panel;Expanded Metal;Press Forming;Three-Point Bending


Supported by : 전남대학교


  1. Clyne, T.W. and Markaki, A.E., 2004, "Ultra Light Stainless Steel Sheet Material," US Patent 6764772, 20 July.
  2. Markaki, A.E., Westgate, S.A. and Clyne, T.W., 2002, in: Ghosh, T.S., Sanders, T.D., Clark, A.K. (Eds.), Proceedings of 3rd Global Symposium on Materials Processing and Manufacturing, TMS Meeting, Seattle, WA, p. 15.
  3. Markaki, A.E. and Clyne, T.W., 2003, "Mechanics of Thin Ultra-Light Stainless Steel Sandwich Sheet Material: Part I. Stiffness," Acta Materialia, Vol. 51, pp.1341-1350.
  4. Markaki, A.E. and Clyne, T.W., 2003, "Mechanics of Thin Ultra-Light Stainless Steel Sandwich Sheet Material: Part II. Resistance to Delamination," Acta Materialia, Vol. 51, pp.1341-1357.
  5. Lesourd, H., 1988, "Sandwich-Type Stampable, Metallic Structure, US Patent 4759994, 26 July.
  7. El-Magd, E., Gebhard, J. and Stuhrmann, J., 2007, "Simulation of the Creep Behaviour of P92 Sandwich structures at $650^{\circ}C$ with Loading Transverse to the Intermediate Layer," Computational Materials Science, Vol. 39, pp.446-452.
  8. Ashby, M.F., Evans, A.G., Fleck, N.A., Gibson, L.J., Hutchison, J.W. and Wadley, H.N.G., 2000, Metal Foams: a Design Guide. Butterworth Heinemann, Boston.
  9. Wicks, N. and Hutchinson, J.W., 2001, "Optimal Truss Plates," International Journal of Solids and Structures, Vol. 38, pp.5165-5183.
  10. Lardner, T.J. and Archer, R.R., 1994, Mechanics of Solids: An Introduction, McGraw-Hill, New York, p. 334.
  11. Crandal, S.H., Dahl, N.C. and Lardner, T.J., 1972, An Introduction to the Mechanics of Solids, 2nd Ed., McGraw-Hill, Tokyo, p. 452.