動的負荷を受けるハニカムサンドイッチ構造の緩衝特性

概要

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Sandwich construction has been made the most use of aircraft construction as one of lightweight structure for about fifty years. Because the core of sandwich converts impact loads into the energy of plastic deformation and absorbs the energy efficiently, sandwich construction is used as the buffer when cars crush and when the amount of resources are thrown from airplane. In the case of design of honeycomb sandwich construction in consideration of its buffer characteristics, it is very important to improve ratios of absorbed energy. In this paper, the aluminum alloy 5052-H34 sandwich construction is investigated with respect to the buffer characteristics by the use of corrugated-core under static and dynamic loads. This experimental study is carried out by the use of the precrush method that is one of the means to improve the buffer effect. The conclusions are summarized as follows. (1) A vertical angle 120° of honeycomb-core is better than the others in the case of using as the buffer. (2) Regardless of the precrush method, the dynamic mean crushing stresses approximate the static values. (3) Ratios of the absorbed energy can be improved about 10% by means of the precrush method.
東海大学の論文