Article
  • Hyperelastic Material Modeling of Natural Rubber Compounds and Finite Element Analysis of Bushing Performance in Automobile
  • Jung Keun Cho*, Ra Sung Kim*, In-Kyung Park*,† , Ye Chan Kim**, Min Ju Hwang**, Jonghwan Suhr*,**, Heon Seob Jung***, Jae Wook Kang***, and Jae-Do Nam*,**,†

  • *School of Chemical Engineering, Department of Polymer Science and Engineering, Sungkyunkwan University, Suwon 16419, Korea
    **Department of Mechanical Engineering, Sungkyunkwan University, Suwon 16419, Korea
    ***Elastomer & Tribology Materials Development Team, Hyundai Motor Company, Hwa-Sung 18280, Korea

  • 천연고무 컴파운딩의 초탄성 재료 모델링 및 차량용 부싱 성능의 유한요소해석 연구
  • 조중근* · 김라성* · 박인경*,† · 김예찬** · 황민주** · 서종환*,** · 정헌섭*** · 강재욱*** · 남재도*,**,†

  • *성균관대학교 화학공학/고분자공학부 고분자공학과, **성균관대학교 에너지과학과, ***현대자동차 고무마찰재료개발팀

Abstract

The design process in automobile industry requires to predict the stiffness of rubber busing materials. The behavior of rubber compound can be simulated using the strain energy density function. It is needed to consider the change of the material properties because the compression deformation caused by the swaging process of the busing. In this study, numerical simulations of the stress-strain curve including the swaging process were carried out using the finite element method and compared with experimental data. The Ogden 3rd model of strain energy density functions predicted the behavior of the busing with natural rubber compound. The stress-strain curves of the rubber busing was calibrated using that the initial compression of the swaging process was the 4.6% strain. Compared to the stiffness of the bushing without swaging effect, the stiffness was improved by 45% and had 99.6% accuracy with the actual test results.


본 연구에서는 차량용 고무 부싱의 설계기준이 되는 강성(stiffness)을 정확히 예측하기 위해 천연고무 컴파운드의 응력-인장 특성을 반영한 Ogden 3차 초탄성 모델이 고무 재료의 거동을 가장 정확하게 예측한다는 것을 규명하였다. 스웨이징 공정에 의한 4.6%의 변형 결과를 재료의 응력-변형률에 보정(calibration)하여 초탄성 모델에 적용한 결과, 스웨이징 효과를 고려하지 않은 예측 대비 약 45% 정확도가 향상되었으며, 실제 시험 결과와 99.6%의 정확도를 보였다. 본 연구는 정확한 고무소재 물성의 모델링을 통하여 부싱의 특성을 성공적으로 예측할 수 있다는것을 확인하였고, 이를 통해 차량용 부싱의 설계, 공정 및 성능 평가 단계를 획기적으로 단축할 수 있는 방법을 제안하였다.


Keywords: rubber bushing, finite element method, hyperelastic model, strain energy density function, swaging

  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2022 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2018; 42(6): 946-953

    Published online Nov 25, 2018

  • 10.7317/pk.2018.42.6.946
  • Received on Apr 10, 2018
  • Revised on Jun 12, 2018
  • Accepted on Jun 19, 2018

Correspondence to

  • In-Kyung Park*, and Jae-Do Nam*,**
  • *School of Chemical Engineering, Department of Polymer Science and Engineering, Sungkyunkwan University, Suwon 16419, Korea
    **Department of Mechanical Engineering, Sungkyunkwan University, Suwon 16419, Korea

  • E-mail: innh@skku.edu, jdnam@skku.edu