An identification of the modal deflections, bending moments and strains for a three layer sandwich cantilever beam is presented in this paper. The analysis covers the first three vibrational modes for elastic cores with relatively thin face layers considering different shear and geometrical parameters. Both anti-nodal transverse and longitudinal strains and their locations are fully investigated. Nodal and peak points are specified for the three vibrational modes. These information provide proper design selection of different dimensions and opera-tional dynamic properties.