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Modeling of wrinkling in sandwich panels under compression
Optimal CAE, 39555 Orchard Hill Place, Ste. 200, Novi, MI.
1999 (English)In: Journal of engineering mechanics, ISSN 0733-9399, E-ISSN 1943-7889, Vol. 125, no 8, p. 875-883Article in journal (Refereed) Published
Abstract [en]

A wrinkling model for sandwich panels in compression is developed with the assumption of a continuous isotropic linear elastic core. Wrinkling stresses for the three modes, defined in a well-known book by H. G. Allen, are expressed by a unified, single expression. The expression depends linearly on a case parameter η, defined to specify the three cases of wrinkling: η = 0 for single-sided face wrinkling (case 1), η = 1 for in-phase wrinkling (case 2), and η = - 1 for out-of-phase wrinkling (case 3). It is shown that the stresses in all three cases are almost identical for short wavelength wrinkling and car be expressed by a single simplified analytical expression; however, they may differ significantly in moderate and long wavelength wrinkling, and for these cases they are given by simplified analytical expressions. It is proved that the in-phase wrinkling stress is the lowest among the three cases. Based on the analysis conducted, limitations of the commonly used Winkler and two-parameter models are discussed. Finally, engineering design procedures are recommended for the wrinkling effect in sandwich panels under compression.

Place, publisher, year, edition, pages
1999. Vol. 125, no 8, p. 875-883
Identifiers
URN: urn:nbn:se:ltu:diva-8488DOI: 10.1061/(ASCE)0733-9399(1999)125:8(875)Local ID: 70054f64-4c9f-4e6c-9557-050948bddf18OAI: oai:DiVA.org:ltu-8488DiVA, id: diva2:981426
Note
Upprättat; 1999; 20130423 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-01-16Bibliographically approved

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Talreja, Ramesh

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