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

The Korean Society of Mechanical Engineers (대한기계학회)
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Tearing Test for Automotive Vibroisolating Rubber and Formulation of Tearing Energy

자동차용 방진고무의 찢김시험 및 찢김에너지 정식화

  • Moon, Hyung-Il (CAE team, Hyundai Mobis) ;
  • Kim, Heon Young (Dept. of Mechanical and Biomedical Engineering, Kangwon National Univ.) ;
  • Kim, Min Gun (Dept. of Mechanical and Biomedical Engineering, Kangwon National Univ.) ;
  • Kim, Ho (Korea Production Technology Center, Korea Institute of Industrial Technology)
  • 문형일 (현대모비스 공학해석팀) ;
  • 김헌영 (강원대학교 기계의용공학과) ;
  • 김민건 (강원대학교 기계의용공학과) ;
  • 김호 (송도테크노파크)
  • Received : 2012.05.22
  • Accepted : 2012.10.17
  • Published : 2012.12.01
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Abstract

A commonly analytical estimation of fatigue life on rubber components is using fatigue life equation based on various fatigue test results. However, such method has very restricted applicability in actual designing processes because performing fatigue tests requires a lot of time and money. In addition, non-standard rubber materials and their randomness make it hard to make databases. In this paper, the other fatigue life estimation method using tearing energy was suggested. We performed static and dynamic tearing test about automotive vibration rubber materials and a finite element formulation using a virtual crack to calculate the tearing energy of rubber components with complicated shapes. To using the suggested method, fatigue life of an automotive motor mount has been estimated and verified the reliability of this method by using comparison between the estimated values and the actual fatigue life.

일반적인 고무 부품의 해석적 피로 수명 예측은 다양한 피로시험 결과를 바탕으로 정의되는 피로 수명식이 사용된다. 그러나, 이와 같은 방식은 피로 시험에 사용되는 비용적, 시간적인 문제로 인해 설계과정에서 매우 제한적으로 사용된다. 더욱이, 고무재료의 비규격화 및 임의적인 특성변화가 피로시험 결과의 데이터베이스화를 어렵게 만든다. 본 논문에서는 찢김에너지를 이용한 또다른 피로수명 예측 방식을 제안하였다. 자동차용 방진고무들에 대한 동적, 정적 찢김시험 및 복잡한 형상을 갖는 고무 부품의 찢김에너지를 계산하기 위하여 가상 결함을 고려한 유한요소 정식화를 수행하였다. 제안된 방법을 사용하여, 자동차용 모터 마운트의 피로 수명을 예측해 보았고, 실제 수명과 예측된 수명을 비교하여 신뢰성을 검증해 보았다.

Keywords

References

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