Zur Knittertragfähigkeit von Sandwichelementen unter lokaler Beanspruchung

Wrinkling strength of sandwich panels subjected to localised loads.

The wrinkling strength of sandwich panels is strongly influenced by local deformations at intermediate supports. In this paper a design procedure is presented to determine the wrinkling strength of sandwich panels subjected to localised loads. Therefore the wrinkling phenomenon is transferred into a non-linear stability problem. The reduced load bearing capacity due to localised loads is considered by an approach of equivalent geometric imperfections, which is presented for point-loads and line-loads. The paper concludes with an alternative approach using a buckling-curve for the wrinkling phenomena.