Fatigue crack growth from compression pre-cracks

Meghan J. Borz, Michael J. Chadwick, Andrew M. Branin, William T. Riddell

Research output: Contribution to journalArticle

Abstract

The compression pre-crack method can be used to develop near-threshold fatigue crack growth rates much quicker than the ASTM standard load shed method. The compression pre-crack method is faster than the standard method and eliminates load history effects that are of concern when the standard method is used. However, crack growth developed using the compression pre-cracking approach is susceptible to different load history effects. A suite of tests using the compression pre-crack method that were performed on AISI 9310 steel are presented in this paper. An approach for identifying the critical crack growth increments required to develop valid data is presented, and the effects of three potential mechanisms are evaluated. For these tests, the residual stress field resulting from the initial compression field appears to be the more important effect on crack growth behavior. Crack growth increments measured from the notch tip that are 2.5 times larger than the size of the plastic zone resulting from the compression pre-cracking are required in order to develop valid data on the fatigue crack growth rate.

Original languageEnglish (US)
Pages (from-to)143-156
Number of pages14
JournalMaterials Performance and Characterization
Volume4
Issue number2
DOIs
StatePublished - Jan 1 2015

Fingerprint

Fatigue crack propagation
Crack propagation
Cracks
Steel
Residual stresses
Compaction
Plastics

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Mechanics of Materials
  • Polymers and Plastics
  • Metals and Alloys

Cite this

Borz, Meghan J. ; Chadwick, Michael J. ; Branin, Andrew M. ; Riddell, William T. / Fatigue crack growth from compression pre-cracks. In: Materials Performance and Characterization. 2015 ; Vol. 4, No. 2. pp. 143-156.
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Fatigue crack growth from compression pre-cracks. / Borz, Meghan J.; Chadwick, Michael J.; Branin, Andrew M.; Riddell, William T.

In: Materials Performance and Characterization, Vol. 4, No. 2, 01.01.2015, p. 143-156.

Research output: Contribution to journalArticle

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