• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2004년도 추계학술대회 논문집
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• pp.38-41
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• 2004

Weatherstrip seals protect passengers form noise, dust, rain and wind out of the vehicle. The more contact area between a body frame and a weatherstrip, the higher efficiency of sealing. A weatherstrip is a sort of an elastomer. Mechanical properties of the weatherstrip is obtained by uniaxial tension test. In this study, nonlinear finite element(FE) analysis is performed to obtain displacements and contact shapes of the weatherstrip. The FE model is developed by using Ogden-foam formulation. In the results of nonlinear FE analysis, the most valuable deformation of the weatherstrip occurred when displacement control value reaches 7.2mm. Severe deformation is observed as the displacement control value become more increased.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2001년도 춘계학술대회논문집C
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• pp.224-228
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• 2001

This paper presents the analyzing method of golf shoes and shows design technique including air-cycled pump in the midsole. The golf shoes are analyzed by using the finite element method for the optimization in design by considering the configuration of midsole and outsole, which compose the golf shoes. Also the optimum size of air-cycled pump in the midsole is examined. Standard human pressure values for boundary conditions are adoped for the finite element analysis. The unknown constants of the strain energy function of Ogden type are observed in accordance with the axial tension test. By using the commercial FEM software for nonlinear analysis, MARC V7.3, the strains and the values of volume change for midsole and outsole are obtained, respectively. As a result, it can be concluded that these values in the midsole and the outsole are different depending on the characteristic of elastomer. More precise investigation about the assembly of two parts, which represent midsole and outsole, is under studying.

• 한국자동차공학회논문집
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• 제13권4호
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• pp.1-7
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• 2005

In vehicle door system, weatherstrip seals protect passengers form noise, dust, rain and wind out of the vehicle. The higher efficient a weatherstrip is, the more durable it is in contact between the door and body frame. In this study, nonlinear finite element(FE) analysis is performed to obtain cauchy-stresses, displacements and reaction forces of the weatherstrip. Mechanical properties of the weatherstrip is obtained by uniaxial tension test. The MARC which is a commercial software for the nonlinear analysis of a flexible FE model is used. Twenty-one cases of the FE model are developed by using Ogden-foam formulation. In the results of nonlinear FE analysis, the most valuable deformation of the weatherstrip occurred when displacement control value reaches 7.2mm. Severe deformation is observed as the displacement control value become more increased. When the weatherstrip is designed, it would be considered that the displacement value of the weatherstrip has to be less than 7.2mm.

• 대한기계학회논문집A
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• 제26권10호
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• pp.2044-2051
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• 2002

In this paper, the deformed shape, the contact forces and the load-displacement curves of the real hollow gasket made of silicon rubber are analyzed using a commercial finite element program MARC. In the numerical analysis, the silicon rubber is assumed to have the properties of the geometric and material nonlinearity and the incompressibility, and the hyperelastic constitutive relations of that material are represented by the generalized Mooney-Rivlin and Ogden models. The outer frictional contact between the hollow gasket and the groove of rigid container and the inner self-contact of the hollow gasket are taken into account in the course of numerical computation. Experiments are also performed to obtain the material data for numerical computation and to show the validity of the mechanical deformation of the hollow gasket, resulting in good agreements between them.

• Elastomers and Composites
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• 제38권3호
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• pp.195-205
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• 2003

본 논문에서는 미드솔에 에어싸이클 펌프를 장착한 골프화에 대한 해석적 방법과 설계기술을 보여준다. 골프화는 유한요소법으로 모델링 하였으며, 더 나은 설계를 위해서 신발을 구성하는 미드솔과 아웃솔의 형상을 고려하였다. 또한 미드솔에 있는 에어싸이클 펌프의 최적의 크기와 형상을 조사하였다. 표준 인체 압력 값을 유한요소해석의 경계 값으로 채택하였다. 오그덴 타입의 변형률에너지 함수의 미지 상수는 인장시험에 따라서 조사하였다. 비선형해석을 위해서 상용 유한요소해석 프로그램 MARC V7.3을 이용하여 미드솔과 아웃솔의 변형률과 부피 변화 값을 각각 구하였다. 미드솔과 아웃솔 유한요소법에 의해 구해진 값은 탄성체의 특성에 따라서 달리 나타난다. 여기에 보인 결과는 보다 나은 골프화 해석에 사용될 것이다. 더욱이, 결과 간들은 보다 효과적인 방법을 개발하기 위한 방법으로 신발산업체에 사용되어 질 수 있다.