Abstract
In this paper, aluminum hexagonal honeycombs are experimentally studied for their mechanical behavior under combined compression-shear loads. Quasi-static and dynamic tests were conducted at five different loading velocities ranging from 5×10−5ms−1 to 5ms−1 using MTS and INSTRON machines, among which tests at 0.5ms−1 and 5ms−1 were conducted for the first time. Specially designed fixtures were employed to apply combined compression-shear loads to honeycombs at angles of 15°, 30° and 45° respectively. Three types of HEXCELL® 5052-H39 aluminum honeycombs with different cell sizes and wall thicknesses were crushed in two different plane orientations (TL and TW). The deformation, crushing force, plateau stress and energy absorption of aluminum honeycombs are presented. The effects of loading plane, loading angle and loading velocity are discussed. An empirical formula is proposed to describe the relationship between plateau stress and loading angle.
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