Impact behavior of honeycombs under combined shear-compression, Part Ⅱ analysis

Bing Hou (1) , Stephane Pattofatto (2) , Yl Li (1) , Han Zhao (2)

1 School of Aeronautics [Xi'an]
2 LMT - Laboratoire de Mécanique et Technologie

In this paper, a numerical virtual model of honeycomb specimen as a small structure is used to simulate its combined shear-compression behavior under impact loading. With Abaqus explicit code, response of such a structure made of shell elements is calculated under the prescribed velocities as those measured in the combined shear-compression test presented in the part I of this study. The simulated results agree well with the experimental ones in terms of overall pressure/crush curves and deformation mode. It allows for the determination of the separated normal behavior and shear behavior of honeycomb specimen under dynamic combined shear-compression. It is found that the normal strength of honeycomb decreases with the increasing shearing load. Quasi-static calculations were also performed and a significant dynamic enhancement found in experiments was validated again in the numerical work. In the end, a crushing envelope of normal strength vs. shear strength plane was obtained on the basis of these simulations.

Mots clés: honeycombs; combined shear-compression; FEM; dynamic enhancement

Domaines: Mécanique des solides [physics.class-ph]; Mécanique des solides [physics.class-ph]

Bing Hou, Stephane Pattofatto, Yl Li, Han Zhao. Impact behavior of honeycombs under combined shear-compression, Part Ⅱ analysis. International Journal of Solids and Structures, 2011, 48 (5), pp.698. ⟨10.1016/j.ijsolstr.2010.11.004⟩. ⟨hal-00580834⟩