Buckling Behavior Study Of Sandwich Panels With Profiled Faces Subjected To Axial Compression

Theoretical and finite element analysis for the buckling and postbuckling behavior of the compressed faces supported by the foam core in sandwich panels are presented.Including:(1)It is assumed that the core is an infinite elastic half-space,the four edges of the thin-walled single plate element supported by the core are assumed to be simply supported,the critical buckling stress is presented by energy method.(2)The postbuckling behavior calculation method of the compressed face in sandwich panels with the profiled steel faces is to replace the buckling coefficient of Winter effective width formulae by a buckling coefficient of the thin-walled single plate element supported by the foam core by energy method.(3)The critical buckling stress,the ultimate stress and the curves of tare abatained by using finite element programme ANSYS.(4)For higher b/t(>100) ratios,Winter formula predicted very high effective width values compared with the FEA and Narayan Pokharel, Mahen Mahendran experimental results.(5)According to the reference~[42] and the FEA results,the revised fomula is obtained.