Elastic-plastic wrinkling of compression loaded sandwich panels made with layered cores was studied analytically and experimentally. A core with a stiff layer near the sandwich skins can improve various properties, including wrinkling and impact strengths, with only a minor weight penalty. The 2D plane stress and plane strain bifurcation problems were solved analytically, save for a determinantal equation which was solved numerically. Experiments were performed on aluminum skin/foam core sandwich panels with different combinations of stiff and soft core materials. Good correlation between experiments and theory was obtained.
Elastic-Plastic Wrinkling of Sandwich Panels With Layered Cores
Contributed by the Applied Mechanics Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF APPLIED MECHANICS. Manuscript received by the Applied Mechanics Division, February 23, 2004; final revision, August 11, 2004. Associate Editor: Z. Suo. Discussion on the paper should be addressed to the Editor, Prof. Robert M. McMeeking, JOURNAL OF APPLIED MECHANICS, Department of Mechanical and Environmental Engineering, University of California—Santa Barbara, Santa Barbara, CA 93106-5070, and will be accepted until four months after final publication in the paper itself in the ASME JOURNAL OF APPLIED MECHANICS.
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Grenestedt, J. L., and Danielsson, M. (March 15, 2005). "Elastic-Plastic Wrinkling of Sandwich Panels With Layered Cores ." ASME. J. Appl. Mech. March 2005; 72(2): 276–281. https://doi.org/10.1115/1.1828063
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