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김규동,이상열,Kim, Gyu-Dong,Rus, Guillermo,Lee, Sang-Youl Korean Society for Advanced Composite Structures 2013 복합신소재학회논문집 Vol.4 No.1
The dynamic analysis of poles made of advanced composite materials is carried out for different length-thickness ratios and layup sequences. The numerical results using ABAQUS obtained for plates and shells are in good agreement with those reported by other investigators. The new results for laminated composite pole structures in this study mainly show the effect of the interactions between the radius-length ratio and other various parameters. The effect of fiber angles of long composite poles also investigated. Key observation points are discussed and a brief design guideline is given.
고속 변형률속도 효과를 고려한 폭발하중을 받는 보강형 방폭벽 구조의 동적 특성
김규동,노명현,이재익,이상열,Kim, Gyu Dong,Noh, Myung Hyun,Lee, Jae Yik,Lee, Sang Youl 한국강구조학회 2016 韓國鋼構造學會 論文集 Vol.28 No.2
본 연구는 폭발하중을 받는 보강판으로 구성된 방폭벽 구조에 대하여 유한요소 동적해석을 수행하였다. 수치 시뮬레이션은 서로 다른 재료로 구성된 경우에 대하여 비교 검증하였으며, 폭발 시뮬레이션 데이터를 기반으로 폭발하중에 대한 방폭벽의 동적거동을 상세 규명하였다. 충격흡수력이 좋은 고망간 강재로 구성된 방폭벽의 경우 충격에 대한 성능이 상대적으로 우수한 것으로 나타났다. 본 연구에서는 LS-DYNA 프로그램을 적용하여 유한요소 충격해석을 수행하였으며, 고속 변형률 속도 효과를 추가로 고려하여 고망간 강재로 보강된 방폭벽에 대하여 확장하였다. 다양한 매개변수를 적용한 수치해석 결과는 폭발 시뮬레이션으로부터 보강된 방폭벽 구조의 동적 효과를 비교 분석하여 서로 다른 재료의 적용효과를 보여준다. A finite element dynamic simulation is performed to gain an insight about the stiffened blast wall structures subjected to blast loading. The simulation was verified using qualitative and quantitative comparisons for different materials. Based on in-depth examination of blast simulation recordings, dynamic behaviors occurred in the blast wall against the explosion are determined. Subsequent simulation results present that the blast wall made of the high performance steel performs much better in the shock absorption. In this paper, the existing finite element shock analysis using the LS-DYNA program is further extended to study the dynamic response of the stiffened blast wall made of the high-performance steel considering high strain-rate effects. The numerical results for various parameters were verified by comparing different material models with dynamic effects occurred in the stiffened blast wall from the explosive simulation.
복합소재 기둥 구조의 실차 충돌 해석에 의한 탑승자 안전성 평가
김규동 ( Gyu Dong Kim ),이상열 ( Sang Youl Lee ) 한국복합신소재구조학회 2014 복합신소재학회논문집 Vol.5 No.2
This study carried out passenger safety assessment by real car crash simulation of composite post structures for road facilities. The effects of different material properties of composites for various parameters are studied using the LS-DYNA finite element program for this study. In this study, the existing finite element analysis of steel post structures using the LS-DYNA program is further extended to study dynamic behaviors of the structures made of various composite materials. The numerical results for various parameters are verified by comparing different models with displacements and stress distribution occurred in the post and car.
골프 참가자의 기본적 심리적 욕구만족, 참여동기 그리고 지속의도와의 관계
김규동(Gyu Dong Kim),정용각(Yong Gak Jung) 한국사회체육학회 2010 한국사회체육학회지 Vol.0 No.42
The purpose of this study is to investigate relationship between psychological needs, participation motivation and intention of continuance participation of golf player. The subjects totalled 300 persons(196-male, 104- female) who exercise golf in golf range. Measurement of this study consulted measurement basic psychological needs, participation motivation, and intention of continuance by Jung, Yong-gak(2006, 1997). For data analysis, using SPSS V16.0 and AMOS 17.0 for windows. The results were as follows. First, Intrinsic Motivation has positive relationship relatedness, autonomy, competence in order. In Extrinsic Motivation, Health/Fitness motivation has positive relationship to relatedness, competition/display motivation to competence and relatedness, affiliation to relatedness. Amotivation has negative relationship to competence and autonomy. Intention of continuance participation of golf have positive relationship relatedness, autonomy in order. In Motivation, intrinsic motivation has positive relationship. Relatedness is an important factor in golf. As with previous research of existing Intrinsic motivation to continue the important predictive variable were verified
다양한 복합소재를 적용한 지주구조의 유한요소 충돌 해석
김규동 ( Gyu Dong Kim ),이상열 ( Sang Youl Lee ) 한국복합신소재구조학회 2015 복합신소재학회논문집 Vol.6 No.1
This study performed a finite element crash analysis of support structures made of various composite materials for road facilities. The effects of different material properties of composites for various parameters are studied using the finite element commercial package for this study. In this study, the existing finite element analysis of composite post structures using the LS-DYNA program is further extended to compare dynamic behaviors against car crash of the structures made of various composite materials. The several numerical examples show the comparison of the nonlinear dynamic effects for different materials.