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양인영(I.Y. Yang),최주호(J.H. Cho),여인구(I.G Yeo),임광희(K.H. Im) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
In this study, one type of circular shaped composite tube was used.CFRP(Carbon Fiber Reinforced Plastic) circular member manufactured from CFRP prepreg sheet for lightweight design. CFRP is an anisotropic material which is the most widely adapted lightweight structural member. The crashworthy behavior of circular composite material tubes subjected to static axial compression under same conditions is reported in this paper.The collapse mode during the failure process were observed and analyzed.
[論文] 충격하중을 받는 유한평판의 3차원 동탄성이론에 의한 응력해석-충격하중 함수근사식의 제안을 중심으로-
양인영(I.Y.Yang),김선규(S.K.Kim),박정수(C.S.Park) 한국자동차공학회 1991 오토저널 Vol.13 No.5
In this paper, an attempt is made to analyze the impulsive stress directly underneath the concentrated impact point for a supported square plate by using the three-dimensional dynamic theory of elasticity and the potential theory of displacement (stress function) on the supposition that the load, F_0 sin ωt, acted on the central part of it.<br/> The results obtained from this study are as follows:<br/> 1. The impulsive stresses cannot be analyzed directly underneath the acting point of concenrated impact load in privious theories, but can be analyzed by using the three-dimensional<br/> dynamic theory of elasticity and the potential theory of displacement.<br/> 2. Theorically, with increasing the pulse width of applied load, it was possible to clarify that<br/> the amount of stress in the point of concentrated impact load was increased and that of stress per unit impulse was decreased.<br/> 3. The numerical inversion of laplace transformation by the use of the F.F.T algorithm contributes the reduction of C.P.U time and the improvement of the accuracy of results.<br/> 4. In this paper recommended, it is found that the approximate equation of impact load function P (τ)=Aτ exp(ㆍBτ), and P (τ)=O.85A exp (-Bτ) sinCτ could actually apply to all impact problem. In compared with the experimental results, the propriety of the analytical method is reasonable.
차량 경량화용 Al/CFRP 구조부재의 충격 거동에 관한 연구
양인영(I.Y. Yang),임광희(K. H. Im),황우채(W.C. Hwang) 한국생산제조학회 2011 한국생산제조시스템학회 학술발표대회 논문집 Vol.2011 No.4
In this study ,based on the collapse characteristics of square section member, the collapse characteristics and energy absorption capability of hat-shaped section members were analyzed. The Impact collapse tests were performed for each member. The collapse modes and the energy absorption capability of the each member were analyzed.