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이성범(Seong Beom Lee),장왕진(Wang Jin Jang),한창용(Chang Yong Han),정재영(Jae Young Jeong) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
A bushing is a device used in automotive suspension systems to reduce the load transmitted from the wheel to the frame of the vehicle. A bushing is a hollow cylinder, which is bonded to a solid steel shaft at its inner surface and a steel sleeve at its outer surface. The relation between the force and moment applied to the shaft and the relative deformation and rotational angle of a bushing exhibits features of viscoelasticity. Simulation of the automotive suspension system involves the interaction between many components. The accuracy of the bushing modeling affects the accurate determination of the transmitted loads among components, the motion of the components, the stresses in the components, and energy dissipation. Rotational angle-dependent moment relaxation function was obtained and expressed as the explicit combination of time and rotational angle. The viscoelastic model for torsional mode was obtained and the results of the viscoelastic model was compared with the experimental results.
비선형 점탄성 부싱모델의 회전방향모드에 대한 실험적 연구
이성범 ( Seong Beom Lee ),이성재 ( Sung Jae Lee ),전성철 ( Sung Chul Jun ),송동률 ( Dong Ryul Song ),정재영 ( Jae Young Jeong ),박찬석 ( Chan Seok Park ),이우현 ( Woo Hyun Lee ) 한국고무학회 2008 엘라스토머 및 콤포지트 Vol.43 No.1
자동차 부싱은 차체로 전달되는 하중을 줄여주는 역할을 하는 자동차 현가장치의 주요부품으로 바깥쪽 슬리브와 안쪽의 축 사이에서 가운데가 비어 있는 실린더의 형상을 가진다. 차축에 작용되는 힘과 모멘트에 대한 부싱의 상대변위 및 변형각도는 점탄성 성질을 나타내며, 부싱에서 힘과 모멘트와 이에 대한 변위와 변형각도의 관계는 다물체 동역학 시뮬레이션에 매우 중요하다. 본 연구는 자동차 부싱의 회전방향 모드에 대한 모멘트와 변형각도의 점탄성 관계를 변형각도에 의존하는 모멘트 완화함수를 통하여 부싱모델을 완성하였으며, 완성된 점탄성 부싱 모델은 회전방향 모드에 대한 실험값과 비교하여 검증하였다. A bushing is a device used in automotive suspension systems to reduce the load transmitted from the wheel to the frame of the vehicle. A bushing is a hollow cylinder, which is bonded to a solid steel shaft at its inner surface and a steel sleeve at its outer surface. The relation between the force and moment applied to the shaft and the relative deformation and rotational angle of a bushing exhibits features of viscoelasticity. Since a moment-rotational angle relation for a bushing is important for multibody dynamics numerical simulations, the simple relation between the moment and rotational angle has been derived from experiment. It is shown that the predictions by the proposed moment-rotational angle relation are in very good agreement with the experimental results.
이성범 ( Seong Beom Lee ),염상훈 ( Sanghoon Yeom ),한창용 ( Chang Yong Han ),우창수 ( Chang Su Woo ) 한국고무학회 2012 엘라스토머 및 콤포지트 Vol.47 No.3
그로멧은 자동차의 고무부품들 중의 하나로 에틸렌 프로필렌 고무로 구성되어 있으며, 고무의 비선형 초탄성 성질은 고무제품의 거동을 예측하는데 중요하다. 본 논문에서는, 일축인장시험과 이축인장시험을 통하여 안정된 응력-변형률 관계를 구하고 그로멧에 대한 유한요소해석을 수행하였고, 수명예측을 위한 노화시험을 소개하였다. Grommet is one of the Automotive rubber components and is made from EPDM(Ethylene Propylene Diene monomer M-class) rubber and the nonlinear hyperelastic material properties of rubber are important to predict the behaviorof rubber product. In this study, the stable stress-strain relations were obtained from the uni-axial tension test and theequi-biaxial tension test. Finite element analysis for grommet was carried out and heat aging test for the lifetime predictionof grommet was introduced.
비선형 점탄성 부싱모델에 대한 주파수와 변위의 영향에 대한 연구
이성범(Seong Beom Lee),김성진(Sung Jin Kim) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
A bushing is a device used in automotive suspension systems to reduce the load transmitted from the wheel to the frame of the vehicle. A bushing is a hollow cylinder, which is bonded to a solid steel shaft at its inner surface and a steel sleeve at its outer surface. The relation between the force applied to the shaft and the relative deformation of a bushing is nonlinear and exhibits features of viscoelasticity. A force-displacement relation for bushings is important for multibody dynamics numerical simulations. For the nonlinear viscoelastic axial response, Pipkin-Rogers model, the direct relation of force and displacement, has been derived from Lianis model and the sinusoidal input was used for Pipkin-Rogers model, and the affection of displacement with frequency change was studied with Pipkin-Rogers model.<br/>