This paper examines the non-linear deflection response of highly stressed sandwich T-joints using large deflection and plasticity analyses. The finite element method considering a plane model of the joint, accounts for plastic deformation of the core and glue materials and non-linear geometric effects. The finite element studies are used to identify internal stress states in the various regions of the joint and for different attachment configurations, leading up to and at failure. The results of this analysis have been combined with the measured properties of the materials forming the joint in order to predict quantitatively the failure strength.
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