Stress concentration due to defects for honeycomb structure in which face sheets are attached to both sides of honeycomb core

Abstract

In this paper, the mechanism of stress concentration due to defects in honeycomb sandwich structure is studied by using finite element method. It is found that the stress concentration can be expressed as a function of E_ct_c / E_pt_p, where t_c is the height of core and t_p is the thickness of plate, and E_c and E_p are the Young’s modulus of core and plate, respectively. Also, we propose that the stress concentration is evaluated by an approximation of an elliptical inclusion.