General buckling analysis of sandwich constructions

摘要: Abstract General buckling analysis of composite sandwich constructions is treated in this paper. Two modes exist an elastic structure under certain loading cases, that is, bifurcation point and extreme buckling. This paper concerned with The energy criterion used for deriving the theoretical formulae. According to criterion, positive two-order variation general potential energy, π, mechanics system necessary sufficient condition ensure a stable static balance state. construction would not support loads suffer failure if instability occurred on it. In analysis, formulae are based finite element method linearity theory. critical stress control equations corresponding can be obtained by commanding equal zero. load structural given solving generalized eigenvalue problem. It shown four numerical examples calculated results accuracy satisfied set computation derived