http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
조재웅(Jaeung Cho),최두석(Dooseuk Choi),김기선(Keysun Kim) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_3
This study investigates the fatigue life and the damage possibility of connecting rod by the fatigue tool of Ansys workbench. The case of constant fatigue loading variation 'Sine' becomes more stable than that of nonconstant loading but the magnitude of constant load becomes larger than that of nonconstant load. Among nonconstant fatigue loads, the case of 'SAE Bracket History' which is severest at the variation of load tends to be most unstable. The case of 'Sample History2' which becomes a little slow at the variation of load tends to be most stable. The maximum relative damage in case of 'SAE Bracket History' is occurred near the average stress '0' and this case can be shown to have the possibility to take more damage than another case.
조재웅(Jaeung Cho),한문식(Moonsik Han) 한국생산제조학회 2012 한국생산제조학회지 Vol.21 No.3
This study aims at the structural analysis with fatigue according to the configuration of railway vehicle wheel. Maximum equivalent stress or deformation is shown at the lower face in contact with wheel and rail. As model B has the maximum stress or deformation which becomes lower than model A, model B is shown to have more durability than model A. Among the cases of nonuniform fatigue loads, SAE bracket history with the severest change of load becomes most unstable but Sample history becomes most stable. In case of Sample history with the average stress of 0 to -10<SUP>11</SUP> Pa and the amplitude stress of 0 to 10<SUP>10</SUP> Pa, the possibility of maximum damage becomes 3%. This stress state can be shown with 6 times more than the damage possibility of SAE Bracket history or SAE transmission. The structural result of this study can be effectively utilized with the design of railway vehicle wheel by prevention and durability against its damage.
조재웅(Jaeung Cho),한문식(Moonsik Han) 한국생산제조학회 2013 한국생산제조학회지 Vol.22 No.1
This study investigates structural durability through the analyses of stress, fatigue life and vibration damage at bike carrier basket. As model 2 has less stress and deformation than model 1 on static structural analysis, model 2 becomes more durable than model 1. Among the cases of nonuniform fatigue loads, ‘SAE bracket history’ with the severest change of load becomes most unstable but ‘Sample history’ becomes most stable. The amplitude deformations become highest at maximum response frequency of 2400Hz in cases of models 1 and 2. As the values of maximum equivalent stresses become within the allowable material stresses at two holes at the upper parts on models 1 and 2, these models become safe. The structural result of this study can be effectively utilized with the design of bike carrier basket by investigating prevention and durability against fatigue or vibration damage.
조재웅(Jaeung Cho),한문식(Moonsik Han) 한국생산제조학회 2013 한국생산제조학회지 Vol.22 No.2
Stress and deformation on forklift happened at loading, unloading or moving freight are studied by structural and fatigue analysis in this study. As model 1 as closing type between forks has lower stress and stain than model 2 at opening type, model 1 has more durability than model 2. Among the cases of nonuniform fatigue loads, ‘SAE bracket history’ with the severest change of load becomes most unstable but ‘Sample history’ becomes most stable. In case of ‘SAE bracket history’ with the severest change of load at model 1 and 2, maximum life is shown with Cycle. Minimum damage with 854 at model 2 becomes much higher than model 1. As the gap between forks becomes open, the damage probability becomes higher. The structural result of this study can be effectively utilized with the safe and stable design of forklift by investigating prevention and durability against its damage.
자전거 프레임의 형상과 방향에 따른 구조적 내구성 해석
조재웅(Jaeung Cho),한문식(Moonsik Han) 한국생산제조학회 2013 한국생산제조학회지 Vol.22 No.6
While accelerating, bicycle frames are subject to torsion forces and deformation. In this study, bicycle frame durability was evaluated by using structural, fatigue, and vibration experiments. Three types of models were designed by changing the frame configurations according to the shape and direction of a bicycle frame design. Because maximum equivalent stress was greatest at the saddle and at connected parts in Models 1, 2, and 3, these frame sections were most vulnerable to failure. Model 2 was the least safe, due to the increased total deformation and equivalent stresses in the top tube horizontal to the ground. Based on vibration and fatigue analysis results, Model 2 was also determined to be the least safe frame, because the head tube was placed slightly higher above the seat tube and inclined to 10°. These study results can be utilized in the design of bicycle frames by investigating prevention and durability against damage.
조재웅(Jaeung Cho),한문식(Moonsik Han) 한국생산제조학회 2010 한국생산제조학회지 Vol.19 No.6
The variable fatigue load is simulated in this study. The stability and the life of the material are analyzed theoretically by Ansys program. These results are successfully applied to the practical wheel to predict the prevention of fracture and the endurance. The life and the damage on the every part of the fatigue specimen can be predicted. As the available lives are compared for every loading variation, the rainflow and damage matrix results can be helpful in determining the effects of small stress cycles in any loading history. The rainflow and damage matrices illustrate the possible effects of infinite life. The safety and stability of wheel and the other practical structures according to the variable load can be estimated by using the results of this study.