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변형률속도에 따른 차량 구조용 접착제의 동적 인장 특성 연구
임승찬(Seung-Chan Lim),허훈(Hoon Huh),하지웅(Jiwoong Ha),이태현(Taehyun Lee) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
This paper investigates the effect of strain-rate on characteristics of structural adhesive. In order to get an accuracy result from crash simulation, we should have to consider the strain-rate hardening effect of adhesive joint, because it affects the crash energy absorption. Dynamic tensile characteristics of structural adhesive with various strain-rate are needed to apply this effect to crash analysis. Uniaxial tensile tests were carried out for structural adhesive from Henkel at the strain-rate ranged from 0.001/sec to 10/sec to measure the tensile properties; Young’s modulus, tensile strength, fracture strain. Strain was measured by digital image correlation technique. Based on the experimental data, Young’ modulus and tensile strength showed increasing tendency with increasing strain-rate, however fracture strain was slightly decreased with increasing strain-rate.