発泡アルミニウムを用いた衝突エネルギー吸収体の圧縮特性

抄録

Foamed aluminum has unique impact energy absorption characteristic. In rate years, use to safety members of machinery for transportation such as a car, a train or a aircraft, foamed aluminum has been examined to make use of the lightweight and unique compression plastic deformation characteristics. To use foamed aluminum as safety member, it is necessary to make the member length large to get enough energy absorption. When foamed aluminum is used in the state of the long column instead of a short pillar, it seems that the problem of the outbreak of plastic instability and the compression buckling at the deformation progress could not be avoided. In this paper, basic plastic deformation characteristics of foamed aluminum in short and long column members are investigated. As a result of the examinations, an analytical model of foamed aluminum has proposed to understand and forecast the influence of material uniformity, aspect ratio, piled-up effects. Based on those results, actual sized examination bodies have produced and tested, and reliability of the model was confirmed.