WRINKLING INSTABILITY IN BIAXIALLY LOADED SANDWICH PANELS

摘要

The problem of face wrinkling in sandwich structures was identified as an important failure mode and first analyzed by Gough et al. (1940) who used a Wrinkler-type elastic foundation to model the core. This work was followed by experiments and further analysis by many others. The research conducted until 1966 was entirely devoted to uniaxial compression loading. However, in many applications, such as naval and aircraft structures, panels are subject to biaxial loading. Such loading was first analyzed by Plantema in 1966 for the case of sandwich constructed of isotropic materials. More recently, Fagerberg (2000) considered the case of sandwich with orthotropic facings.