Crack propagation under cyclic hydraulic pressure loading

Research output: Contribution to journalArticleScientificpeer-review

Details

Original languageEnglish
Pages (from-to)543-550
Number of pages8
JournalINTERNATIONAL JOURNAL OF FATIGUE
Volume19
Issue number7
Publication statusPublished - Aug 1997
MoE publication typeA1 Journal article-refereed

Researchers

Research units

  • VTT Technical Research Centre of Finland
  • University of Illinois

Abstract

Mode I propagation rates for small cracks in a hardened AISI 52100 bearing steel under cyclic hydraulic pressure loading have been measured. Stress intensities were generated by applying high pressure fluid at the mouth of the crack without external far-field loads. Effects of crack size, cyclic pressure range, ambient fluid viscosity, and frequency have been observed. Some test conditions produced da/dN values comparable to baseline growth rate data collected in air under uniaxial cyclic tension while others resulted in significantly reduced or no crack propagation. Reduced crack growth rates are probably due to a lack of full fluid penetration into the crack or incomplete expulsion of fluid from between the crack faces both of which reduce Delta K-eff. Test data are compared to predictions from the characteristic penetration time model of Hsia and Xu. Qualitative agreement is observed, but some simplifications in the model, for example, constant viscosity, would require modification before qualitative comparison with experimental data can be made. (C) 1997 Published by Elsevier Science Ltd.

    Research areas

  • fatigue, rolling-contact, crack propagation, cyclic hydraulic pressure, AISI 52100, bearing steel, fluid penetration, CONTACT

ID: 3207163