Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Evaluation of Fatigue Characteristics of Rubber for Tire Using Strain Energy Density

변형률에너지밀도를 이용한 타이어용 고무의 피로 특성 평가

  • 안상수 (성균관대학교 기계공학부) ;
  • 김성래 (넥센타이어(주) 연구개발본부) ;
  • 박한석 (넥센타이어(주) 연구개발본부) ;
  • 강용구 (넥센타이어(주) 연구개발본부) ;
  • 구재민 (성균관대학교 기계공학부) ;
  • 석창성 (성균관대학교 기계공학부)
  • Received : 2012.02.23
  • Accepted : 2012.07.24
  • Published : 2012.10.01
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Abstract

Rubber, a hyperelastic material, is the main material used in tires. During the operation of a car, the tire receives various types of loads. The accumulation of strain energy due to such loads induces tire failure. Generally, because rubber materials used for tires have stress softening characteristics, unlike metals, test methods used for metals cannot be applied to rubber. Therefore, in this study, for the evaluation of the fatigue properties of two types of specimens that have different material components, a tensile test and a fatigue test according to the extended strain range dissimilar to ASTM D4482 are performed, and fatigue life equations are proposed based on the test results.

초탄성 재료인 고무는 타이어의 주 원료인데, 주행 중 다양한 형태의 하중을 받는다. 그와 같은 하중에 의하여 타이어에 변형률에너지가 축적되어 파손에 이르게 된다. 일반적으로 초탄성재료인 고무는 금속과 다른 응력연화 특성을 갖고 있기 때문에 금속의 시험법을 적용할 수 없다. 따라서 본 연구에서는 조성비가 다른 2 종의 타이어용 고무에 대한 피로특성을 평가하기 위하여, ASTM D4482 규격에서 요구하는 변형률 범위를 확장하여 인장 및 피로시험을 진행하였으며, 실험 결과를 이용하여 피로수명식을 제안하였다.

Keywords

References

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