IMPACT ENERGY ABSORBING MEMBER MADE OF FOAM ALUMINIUM AND MANUFACTURE THEREOF

摘要

PURPOSE: To increase energy absorbing quantity and reduce reaction at the time of impact by laminating plural foam aluminium material with the bulk specific gravity being within a specific range, and setting the deformation quantity, compressive stress, thickness, constants, and the like of the whole laminated body to the specific relation. ;CONSTITUTION: Foam aluminium material with the bulk specific gravity being within a range of 0.05-0.6g/cc is laminated in plural layers. The relation expressed by a separately stated equation as an approximate expression is materialized among constants a_i, b_i and thickness W_i univocally determined according to the deformation quantity R_i compressive stress σ_p, thickness W_p and respective constants a_p, b_p of the whole laminated body and the deformation quantity R_i, compressive stress σ_i and bulk specific gravity G_i of single foam aluminium material. An impact energy absorbing member made of this foam aluminium is applied to an automobile bumper, an impact absorbing pad, a road side fence, or the like. The impact energy absorbing member large in energy absorbing quantity and small in reaction at the time of impact is thereby obtained.;COPYRIGHT: (C)1996,JPO