발간논문

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Vol.36, No.5, 697 ~ 706, 1998
Title
Effect of Cross - Sectional Shape on Impact Absorption Energy of Extruded Aluminum Tube for Space Frame
김동국 , 이성학 , 이재용 Dong Kuk Kim , Sung Hak Lee , Jae Yong Lee
Abstract
The present article aims at evaluating experimentally impact absorption energies of extruded aluminum tube for space frame and at investigating the effect of cross-sectional shape on the compressive deformation behavior under dynamic loading. The dynamic compressive test was conducted on extruded aluminum tube specimens, whose shape and thickness to width (or diameter) ratio are different. using a high performance servo-hydraulic machine. Zig-zag type plastic hinges were formed mainly in the rectangular shaped specimens, whereas ring type hinges were formed in the circular shaped specimens. However, the hinge shape tended to become ring type as the thickness to width (or diameter) ratio increased, and the calculated values of impact absorption energy increased linearly. To improve the impact absorption energy and the maximum repulsive force against the compressive load of extruded tube for apace frame. it is recommended to make the thickness/width ratio of extruded tube as large as possible and to design the circular cross-sectional shape in a way to promote the formation of ring type plastic hinges instead of zig-zag type hinges.
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