Full field measurements of anisotropic stress intensity factor ranges in fatigue

Garrett J. Pataky, Michael D. Sangid, Huseyin Sehitoglu, Reginald F. Hamilton, Hans J. Maier, Petros Sofronis

    Research output: Contribution to journalArticlepeer-review

    50 Citations (Scopus)

    Abstract

    The effects of anisotropy during mixed mode fatigue crack growth were studied in single crystal 316L stainless steel. An anisotropic least-squares regression algorithm using displacements from digital image correlation was developed to find the effective stress intensity factors, K I and K II, and the T-stress. Crack tip plastic zones were determined using an anisotropic yield criterion. Strains in the plastic zone obtained from digital image correlation showed a dependence on the crystallography and load ratio. Crack tip slip irreversibility was measured and showed an increasing trend with increasing crack length; this information is critical for describing crack growth behavior.

    Original languageEnglish
    Pages (from-to)13-28
    Number of pages16
    JournalEngineering Fracture Mechanics
    Volume94
    DOIs
    Publication statusPublished - Nov 2012

    All Science Journal Classification (ASJC) codes

    • General Materials Science
    • Mechanics of Materials
    • Mechanical Engineering

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