Shear Strength of Honeycomb Sandwich Panel with Impact Damage

Abstract

Abstract Impact damage may reduce the mechanical property of honeycomb sandwich composites. In this paper, the impact damage and post-impact shear behavior of honeycomb sandwich plates are studied experimentally. The same impact damage energy was applied to all six test specimens. The damage region and depth of the impact crater were measured by using equipment. Shear tests were conducted on intact and damaged specimens to compare their strain fields and failure modes. The results show that there were no buckling phenomenon in the skin occurred both in intact and damaged specimens during the whole shear experiment. The failure mode of the pristine specimens is different from that of damaged specimens. The shear failure load after impact decreases by 17.1% compared to the non-impact panel. This leads to the conclusion that the impact damage worsens the mechanical property of the honeycomb composite panel and has a great effect on it.