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주파수 응답계수에 따른 CFRP 복합적층판의 충격특성평가
임광희(Im Kwang-Hee),박노식(Park No-Sick),양인영(Yang In-Young) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.5
Absorbed energy of orthotropic composites with using T300 fiber, which are composed of the fiber and Stacking number is higher than that of quasi. isotropic specimen over impact energy 7J, but in case of using T700 fiber, much difference does not show. Also, absorbed energy of orthotropic composites with using T300 fiber, Which are composed of stacking number and orientation became more than that of T700 fiber specimen; however great change doesn't show in case of quasi-isotropic specimens. Delamination area of impacted specimens was measured with ultrasonic C-scanner to find correlation between impact energy and delamination area. Delamination area and frequency responses was evaluated between impacted and unimpacted specimens. There is a strong correlation between frequency responses and impact-induced delamination. The presence and scale of damages have been investigated based on the variations of frequency responses.
CFRP 적층재의 잔류피로 굽힘강도에 미치는 열습의 영향
임광희(Im Kwang Hee),박노식(Park No Sick),양인영(Yang In Young) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_1
This paper aims at the static and fatigue bending strengths of CFRP <carbon fiber reinforced plastic> laminates subjected to hygrothermals. The specimens which had different stacking composition, orthotropic and Quasi -isotropic laminated plates, were prepared for this experiment. A steel ball launched by the air gun collides against CFRP laminates to generate impact lamages, and the 3-point fatigue bending test is carried out by using the impacted laminates to investigate the influence of hygrothermals on the effect on the fatigue. strength of CFRP laminates.
朴魯植,曺奎鍾,洪性完 울산대학교 1977 연구논문집 Vol.8 No.2
本 硏究는 韓國 商工部 標準型船 中 G.T. 10,000?級 Liner船型에 數式表示法을 適用하여, 原船型과 數式表示에 依해 얻은 船型과를 比較檢討하여, 本 方法이 船型의 初期設計에 實用 可能性이 있음을 確認하였고 本法의 應用에 必要한 program 및 각 parameter들의 變化에 따른 水線形狀의 變化를 調査하였다. This paper applied the liner form of G.T. 10,000 ton class ship included in the standard ship forms of the Cmooerce and Industry Ministry, to represent the ship form mathematical mehtod. This discription compared with and inspected both this results and original lines. and , It was investigated that the variations of waterline form in accordance with the varing water line paramenters and form parameters in order to adopt the datafor the applications of this method.
CFRP 복합적층판의 적층배향·계면수에 따른 저속충격특성
임광희,박노식,나승우,김영남,이현,심재기,양인영 한국공작기계학회 2001 한국생산제조학회지 Vol.10 No.6
In this paper, this study aims at the evaluation on the characteristics of CFRP laminate plates using a falling weight impact tester. The experiment was conducted on several laminates of different orientation. A system was built for measuring the impact strength of CFRP laminates in consideration of stress wave propagation theory using a falling weight impact tester. Delamination areas of impacted specimens for the different ply orientation were measured with ultrasonic C-scanner to find correlation between impact energy and delamination area. Absorbed energy of quasi-isotropic specimen having four interfaces was higher than that of orthotropic laminates with two interfaces. The more interfaces, the greater the energy absorbed. The absorbed energy of a hybrid specimen containing a GFRP layer was higher than that of normal specimens.
金正濟,宋在鉉,朴魯植,李昌憶 울산대학교 1978 연구논문집 Vol.9 No.2
現在 大學 初級學年의 造船工學 敎育에 있어서 배의 船型, 線圖 및 Off-Set Table을 理解시키는데 상당한 時間을 소비하고 있다. 이 問題를 解決하기 위하여 船體를 各各 Water Line 斷面, Buttock Line 斷面 및 Station Line 斷面으로 분리할 수 있는 3척의 小型 木製 模型船을 製作 하였다. In elementary course of Naval Architecture at University or College, instructers, at present, spend considerably long time to make students understand the concept and relationship among hull form, lines and off-set table. In order to solve this problem, the Author along with the associates have manufactured three wooden ship hull form models that are separable at Water line section. Buttock line section and Station line section respectively.
열습효과가 CFRP 적층판의 굽힘피로강도에 미치는 영향
임광희,박노식,양인영 조선대학교 동력자원연구소 1996 動力資源硏究所誌 Vol.18 No.2
This study is to estimate the static and fatigue bending strengths of CFRP (carbon fiber reinforced plastic) laminates subjected to hygrothermals. The specimens which had different stacking composition, orthotropic and quasi-isotropic laminated plates, were prepared for this experiment. A steel ball launched by the air gun collides against CFRP laminates to generate impact damages, and the 3-point fatigue bending test is carried out by using the impacted laminates to investigate the influence of hygrothermals on the effect on the fatigue strength of CFRP laminates.
CFRP 적층재의 잔류피로굽힘강도에 미치는 열습의 영향
양인영,박노식,임광희 한국산업안전학회 1997 한국안전학회지 Vol.12 No.2
This paper evaluates the static and fatigue bending strengths of CFRP(carbon fiber reinforced plastic) laminates subjected to hygrothermals. The specimens which had different stacking composition, orthotropic and quasi-isotropic laminated plates, were prepared for this experiment. A steel ball launched by the air gun collides against CFRP laminates to generate impact damages, and the 3-point fatigue bending test is carried out by using the impacted laminates to investigate the influence of hygrothermals on the effect on the residual bending fatigue strength of CFRP laminates.