Laboratory for Dynamics of Machines and Structures 
Fatigue Damage for Sweep-Sine and Random Accelerated Vibration Testing
 V. Pahor Kos, J. Slavič and M. Boltežar
Advances in Mechanical Engineering ID 340545

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Abstract
The vibration testing of components in the automotive industry requires long testing times and the use of expensive facilities. To shorten these testing times an accelerated vibration-testing approach is usually applied. This research tries to shorten these testing times by considering the parameters that define vibration-testing techniques. With special attention to the excitation types sweepsine and random, a damage-based approach is applied. The phenomenon of fatigue damage is closely observed from the frequencydomain point of view but also by considering the relationship between the time and the frequency domains. The Palmgren-Miner cumulative rule is applied to calculate the fatigue life. Two case studies of measured responses are used to compare the times to failure. The results show that proposed predictions can be used to compare different testing techniques, but they are not so accurate when predicting the actual times to failure.
Authors


Vanja Pahor Kos, PhD

  MAHLE Letrika d.o.o.
  vanja.pahor.kos@si.mahle.com
  

Associate Professor

Janko Slavič, PhD

  Ladisk, Faculty of Mechanical Engineering, University of Ljubljana
  janko.slavic@fs.uni-lj.si
  +386 1 4771 226
jankoslavic     jankoslavic    
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Professor

Miha Boltežar, PhD

  Ladisk, Faculty of Mechanical Engineering, University of Ljubljana
  miha.boltezar@fs.uni-lj.si
  +386 1 4771 608
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