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Influence of Spot Weld Pitches on Collapse Characteristics for SCP1 Vehicle Members  

차천석 (조선대학교 항공ㆍ조선공학부)
박제웅 (조선대학교 항공ㆍ조선공학부)
양인영 (조선대학교 기계공학부)
Publication Information
Journal of Welding and Joining / v.20, no.6, 2002 , pp. 802-808 More about this Journal
Abstract
Front-side members are structures with the greatest energy absorbing capability in a front-end collision of vehicles. This paper was performed to analyze initial collapse characteristics of spot welded hat and double hat-shaped section members, which are basic shape of side members, on the shift of flange weld pitches. The impact collapse tests were carried out by using home-made vertical air compression impact testing machine, and impact velocity of hat-shaped section members is 4.17m/sec and that of double hat-shaped section members is 6.54m/sec. In impact collapse tests, the collapsed length of hat-shaped section members was about 45mm and that of double hat-shaped section members was about 50mm. In consideration of these condition, axial static collapse tests(0.00017m/sec) of hat and double hat-shaped section members were carried out by using UTM which was limited displacement, about 50mm. As the experimental results, to obtain the best initial collapse characteristics, it is important that stiffness of vehicle members increases as section shapes change and the progressively folding mode induces by flange welding pitch.
Keywords
Front-side members; Spot welded; Collapse characteristics; Spot weld pitches; Impact and static collapse test;
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