Novel dynamic fatigue-testing device: Design and measurements

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Abstract

The influence of dynamics on a propagating fatigue crack has not been studied experimentally yet mainly due to quasi-static loading from traditional fatigue-testing machines. To overcome this serious drawback, a novel base-excited fatigue-testing device was designed and built to allow measurement of the dynamic responses of a single-edge-notch beam (SENB) under a growing fatigue crack. In this paper, the details of the novel test rig including initial development, modification and instrumentation are given. The experimental time histories obtained for harmonic and chaotic excitations have shown that the fatigue rig is capable of generating a wide range of loading patterns. Moreover, the experimental crack growth curves and features of the fracture surface have confirmed that the rig is capable of inducing proper fatigue cracks.

Original languageEnglish
Pages (from-to)2218-2226
Number of pages8
JournalMeasurement Science and Technology
Volume17
Issue number8
Early online date13 Jul 2006
DOIs
Publication statusPublished - Aug 2006

Keywords

  • fatigue
  • dynamics
  • design
  • experimental testing
  • CRACK GROWTH
  • VIBRATIONS
  • SHAFT
  • BEAM

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