Considerations of Vibration Fatigue for Automotive Components

Paper #:
  • 2017-01-0380

Published:
  • 2017-03-28
Affiliated:
Abstract:
It occurs frequently that automotive components fail due to vibration excitations on the proving ground during their last phase of durability validation process. This leads to additional design release time, cost and even impact vehicle launch if a safety issue. The appearing cause of this issue is under-testing or lack of component level testing, however the root cause is that vibration fatigue is not considered during the design phase of the parts. This paper introduces aspects of vibration fatigues helping designer and release engineer better understand the requirements, testing methodologies available, and ideas for improving vibration fatigue for designing and validating their product. Several examples are given to introduce the fundamental but universal root cause of all the vibration fatigue failures. Typical vibration levels and frequency contents on varied area on automotive are introduced. Worst case vibration profiles for components mounted on vehicle frame, body or on engine are presented and compared with international or industry standards. Methodologies available for conducting actual vibration test are introduced. Finally, aspects could improve component’s vibration fatigue are recommended.
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