Global Static Testing and Model Validation of Stiffened Thin-Film Polyimide Panels

Abstract

Nomenclature E app = apparent modulus of a hollow beam E s = modulus of elasticity for the solid material E x = modulus of elasticity along the major axis E y = modulus of elasticity along the minor axis E 1 = modulus of elasticity along the 1 axis E 2 = modulus of elasticity along the 2 axis G 12 = shear modulus l = hexagon edge length t = hexagonal void spacing " i = strain along the i axis = internal angle of the hexagon ij = generic Poisson's ratio = volumetric density i = stress along the i axis