Homogenization of cellular sandwich cores considering core face sheet constraints

摘要

Aim of the present study is the determination of the effective elastic properties of two-dimensional cellular sandwich cores in consideration of core-face sheet constraints. The microstructure is homogenized by a strain-energy based RVE-concept assuming that strain states, which are equivalent on the macroscopic level, lead to equal strain energy in a representative volume element whether the real microstructure or the quasi-homogeneous "effective" medium is considered. The strain energy is evaluated analytically assuming that the displacement field of the cellular structure can be described by a weighted superposition of the displacement fields of the unconstrained core and the face sheets. [References: 4]