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곽승범(Seung-Bum Kwak),최낙삼(Nak-Sam Choi),신세문(Sei-Moon Shin),신외기(Wae-Gi Shin) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
Rubber hoses for automobile radiators are apt to be degraded and thus failed due to the influence of contacting stresses of air and coolant liquid under thermal and mechanical loadings. The aging behaviors of the skin part of the hoses due to thermo-oxidative and electro-chemical stresses were experimentally analyzed. Through the thermo-oxidative aging test, it was shown that the surface hardness IRHD(International Rubber Hardness Degrees) of the rubber increased with a considerable reduction of failure strain as the aging time and temperature increased. On account of the penetration of coolant liquid into the skin part influenced by the electro-chemical degradation(ECD) test the weight of the rubber hose increased, whereas their failure strain and IRHD hardness decreased. The hardness of the hose in the side of the negative pole was the most deteriorated at the test site of the hose skin just below the coolant surface.
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우창수 ( Chang Su Woo ),김완두 ( Wan Doo Kim ),박현성 ( Hyung Sung Park ),신외기 ( Wae Gi Shin ) 한국고무학회 2012 엘라스토머 및 콤포지트 Vol.47 No.3
고무부품의 신뢰성을 확보하기 위해서는 피로수명예측 및 평가기술 개발이 중요하다 하겠다. 최근에 고무부품에 대한 고 성능, 고 신뢰성을 위해 설계, 해석 및 평가기술이 요구되고 있으나, 지금까지는 경험과 시행착오적인방법으로 개발되고 있는 실정이다. 따라서, 본 연구에서는 고무소재에 대해 배합조건, 기계적 특성, 열화 및 피로수명등을 포함하는 고무소재 물성 데이터베이스를 구축하고, 고무부품의 특성해석 결과를 데이터베이스와 연계하여 고무부품의 피로해석 모델을 개발하였으며, 실제 피로시험 결과를 통하여 개발된 모델의 타당성을 검증하였다. The fatigue analysis and lifetime evaluation are very important in design procedure to assure the safety andreliability of the rubber components. Recently, the design, analysis and evaluation technology was required to achieve thehigh quality, fidelity, reliability of rubber products. However, rubber manufacturing companies of our country have uesd the method of trial and error and experience in the process of a compound mixing, manufacturing and improvement ofrubber properties. The objectives of this study are to establish the test methods of rubber material and to make the databaseof rubber material properties and to evaluate the performance of rubber components and to construct the prediction systemof fatigue life. Fatigue lifetime prediction methodology of the rubber component was proposed by incorporating the finite element analysis and fatigue damage parameter from fatigue test.
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우창수(Chang Su Woo),김완두(Wan Doo Kim),김영길(Young Gil Kim),신외기(Wae Gi Shin),이성훈(Seong Hoon Lee) 대한기계학회 2010 大韓機械學會論文集A Vol.34 No.8
고무부품의 신뢰성을 확보하기 위해서는 피로수명예측 및 평가기술 개발이 중요하다 하겠다. 최근에 고무부품에 대한 고성능, 고신뢰성을 위해 설계, 해석 및 평가기술이 요구되고 있으나, 지금까지는 경험과 시행착오적인 방법으로 개발되고 있는 실정이다. 따라서, 본 연구에서는 고무소재에 대해 배합조건, 기계적 특성, 열화 및 피로수명 등을 포함하는 고무소재 물성 데이터베이스를 구축하고, 고무부품의 특성해석 결과를 데이터베이스와 연계하여 고무부품의 피로해석 모델을 개발하였으며, 실제 피로시험 결과를 통하여 개발된 모델의 타당성을 검증하였다. Fatigue analysis and lifetime evaluation are very important in design procedure for assuring the safety and reliability of rubber components for mechanical systems. Till recently, the technology for the design, analysis, and evaluation of rubber products was required to manufacture rubber products with high quality, fidelity, and reliability. However, in the rubber-manufacturing companies in Korea, the processes of compound mixing, manufacturing of rubber products, and improvement of rubber properties are based on the trial-and-error method and experience. The objectives of this study are to establish methods for testing rubber materials, to develop a database of the properties of rubber materials, to evaluate the performance of rubber components, and to develop a system for predicting fatigue life. A method to predict fatigue-life of rubber components was proposed; in this method, the finite-element analysis and fatigue damage parameter as determined from a fatigue test are incorporated.
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우창수(Chang Su Woo),김완두(Wan Doo Kim),박현성(Hyun Sung Park),김영길(Young Gil Kim),신외기(Wae Gi Shin),이성훈(Seong Hoon Lee) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.3
본 논문에서는 고무소재에 대해 배합조건, 기계적 특성, 열화, 피로수명 등을 포함한 소재 물성 데이터베이스를 구축하고 고무부품의 특성해석 결과를 데이터베이스와 연계하여 고무부품의 피로해석 모델을 개발하고 피로수명시험 결과를 통하여 개발된 모델을 검증하였다. 이상의 모든 사항을 통합한 고부부품 설계, 해석시스템을 개발하였으며, 이를 이용하면 고부부품 개발에 소요되는 시간과 경비를 절감하고 개발된 제품의 신뢰성을 향상시키리라 기대된다. The fatigue analysis and lifetime evaluation are very important in design procedure to assure the safety and reliability of the rubber components. Recently, the design, analysis and evaluation technology was required to achieve the high quality, fidelity, reliability of rubber products. However, rubber manufacturing companies of our country have used the method of trial and error and experience in the process of a compound mixing, manufacturing and improvement of rubber properties. The objectives of this study are to establish the test methods of rubber material and to make the database of rubber material properties and to evaluate the performance of rubber components and to construct the prediction system of fatigue life. Fatigue lifetime prediction methodology of the rubber component was proposed by incorporating the finite element analysis and fatigue damage parameter from fatigue test.
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