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Fatigue Life Estimation of Induction-Hardened Drive Shaft Under Twisting Loads

비틀림 하중을 받는 고주파열처리 드라이브 차축의 피로수명 평가

  • Kim, Tae Young (Dept. of Mechanical Engineering, Dong-A Univ.) ;
  • Kim, Tae An (Dept. of Mechanical Engineering, Dong-A Univ.) ;
  • Han, Seung Ho (Dept. of Mechanical Engineering, Dong-A Univ.)
  • 김태영 (동아대학교 기계공학과) ;
  • 김태안 (동아대학교 기계공학과) ;
  • 한승호 (동아대학교 기계공학과)
  • Received : 2017.01.09
  • Accepted : 2017.02.14
  • Published : 2017.06.01

Abstract

The drive shaft of passenger vehicle has an important role in transmitting the torque between the power train system and the wheels. Torsional fatigue failures occur generally in the connection parts of the spline edge of the drive shaft, when there is significant fatigue damage under repeated twisting loads. A heat treatment, an induction hardening process, has been adopted to increase the torsional strength as well as the fatigue life of the drive shaft. However, it is still unclear how the extension of the induction hardening process in a used material relates to its shear-strain fatigue life range. In this study, a shear-strain controlled torsional-fatigue test with a specially designed specimen was conducted by an electro-dynamic torsional fatigue test machine. A finite element analysis of the drive shaft was carried out using the results obtained by the fatigue experiment. The estimated fatigue life was verified through a twisting load test of the real drive shaft in a test rig.

Acknowledgement

Supported by : 산업통산자원부

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