[논문]경기력 향상을 위한 경주용 탄소 자전거 프레임의 하중과 변형에 관한 연구

최웅재; 최승호; 김용선; 윤성민; 김홍건

doi:10.14775/ksmpe.2019.18.1.046

경기력 향상을 위한 경주용 탄소 자전거 프레임의 하중과 변형에 관한 연구
A Study on the Load and Deformation of Race Carbon Bicycle Frame for Improved Athletic Performance 원문보기

한국기계가공학회지 = Journal of the Korean Society of Manufacturing Process Engineers, v.18 no.1, 2019년, pp.46 - 51

최웅재 (윈엔윈 (주)) , 최승호 (윈엔윈 (주)) , 김용선 (전주대학교 기계공학과) , 윤성민 (전주대학교 기계공학과) , 김홍건 (전주대학교 기계공학과)

Abstract ▼ AI-Helper

As the industry develops and quality of life increases, the concept of leisure is also changing. Bicycling is a healthy sport for exercising while enjoying nature, facilitating the enjoyment of a healthy life. As a result, the awareness surrounding bicycles has increased, and so has the interest in lighter and more luxurious carbon bikes. The number of domestic companies producing carbon bicycles frames is nil. In this study, we analyze the frames of existing foreign brands and analyze the deformation and stress concentration area according to the load of the frame, using the finite element analysis. In addition, we set up the range of stiffness based on the content of the structural analysis, to localize the carbon bicycle frame and famous foreign products, and compare the prototype with the stiffness by using bicycle molds for track races.

주제어

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제안 방법

Thus, this study aims to analyze the stiffness of carbon-made frame bicycles from overseas before the maximum muscle strength and maximum power are studied according to stiffness, and conduct analyses and displacement using commercial structural analysis software. In addition, it aims to set the range of stiffness based on the standards of popular overseas products and structurally analyzed results for the localization of carbon-made bicycle frames and fabricate prototypes by a stiffness level using a bicycle mold for track racing and compare them.
The tension and bending tests were conducted as an analysis method. The finite element analysis for each load on the frame was conducted, and then a frame for each stiffness was fabricated and analyzed, thereby obtaining the following conclusions.
The product of the no. 1 frame manufacturer for cyclists and products of I Inc. and B Inc., two of the renowned brands, were chosen and their stiffness and displacement analyzed. Fig.
The tension and bending tests were conducted to analyze finite elements and mechanical characteristics of nano carbon, which was the material of the frames. The specimens used in the test were fabricated in accordance with ATTM D790 and ASTM D3039, and tests were conducted through the universal tester. Fig.
This study analyzed the carbon materials of the pattern used to fabricate a carbon-made bicycle frame. The tension and bending tests were conducted as an analysis method. The finite element analysis for each load on the frame was conducted, and then a frame for each stiffness was fabricated and analyzed, thereby obtaining the following conclusions.
The tension and bending tests were conducted to analyze finite elements and mechanical characteristics of nano carbon, which was the material of the frames. The specimens used in the test were fabricated in accordance with ATTM D790 and ASTM D3039, and tests were conducted through the universal tester.
This study analyzed the carbon materials of the pattern used to fabricate a carbon-made bicycle frame. The tension and bending tests were conducted as an analysis method.
Thus, this study aims to analyze the stiffness of carbon-made frame bicycles from overseas before the maximum muscle strength and maximum power are studied according to stiffness, and conduct analyses and displacement using commercial structural analysis software. In addition, it aims to set the range of stiffness based on the standards of popular overseas products and structurally analyzed results for the localization of carbon-made bicycle frames and fabricate prototypes by a stiffness level using a bicycle mold for track racing and compare them.

성능/효과

1. The existing products of overseas brands were analyzed, and the results showed that the frames from B Inc. and C Inc. had the hardest and softest stiffness, respectively.
3. Based on the analysis results, three types of frames were fabricated after raising the stability by adding a layer to where the stress was concentrated and removing the layer in the frame's upper end to reduce the weight.
The stiffness under each load was analyzed through the finite element analysis before the prototypes were fabricated. The analysis results revealed that when load was 80 kg, the maximum strain was 3.57 mm, the maximum stress was 193.21 MPa, and the stiffness was 218 N/mm. When load was 200 kg, the maximum strain was 8.

후속연구

Compared to the overseas frames with excellent stiffness, this study could develop a frame with lighter weight and the same stiffness. This study will significantly contribute to the localization of carbon-made bicycle development in Korea in the future. In addition, it will be helpful for cyclists to select from a wide range of frames.

참고문헌 (13)

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원문보기 상세보기
Lee, J. A., Hong, H. T., Chun, H. J., "Strength Design of Lightweight Composite Bicycle Frame", Transactions of the Korean Society of Mechanical Engineers A, Vol. 37, No. 2, pp. 265-270, 2013.

원문보기 상세보기
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원문보기 상세보기
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Cho, J. U., Han, M. S., "Structural Durability Analysis Related to Shape and Direction of Bicycle Frames", Journal of the Korean Society of Manufacturing Technology Engineers, Vol. 22, No. 6, pp. 969-975, 2013.

원문보기 상세보기
Han, S. G., Chun, S. Y., Kang, S. K., "Durability Design of the Thickness of Bicycle Frames", Journal of the Korean Society of Manufacturing Process Engineers, Vol. 14 No. 6, pp. 84-89, 2015.

원문보기 상세보기
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Kwon, K. B., Cheong, S. K., "Measurement and Analysis of the Torsional and the Bottom Bracket Stiffness of a Bicycle Frame", J. Korean Soc. Mech. Technol, Vol. 19, No. 3, pp. 433-437, 2017.

상세보기
Lee, J. S., Kim, B. C., Lee, H. M., Park, S. H., Myung, B. S., Mun, D. H., "Method of Bicycle Configuration Design Based on Part-Shape Information Model", Journal of the Korean Society of Manufacturing Process Engineers, Vol. 14, No. 3, pp. 74-84, 2015.

원문보기 상세보기
Lee, B. S., "Design and Manufacture of CFRP Pipe for Bicycle Frame", Journal of the Korean Society for Precision Engineering, Vol. 20, No. 6, pp. 130-137, 2013.
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