Measuring and predicting the effects of residual stresses on crack propagation

Anton Shterenlikht, Danut Stefanescu, Matthew Fox, Kerry Taylor, João Quinta da Fonseca, Andrew Sherry, Philip Withers

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    Abstract

    This article presents the first part of a study on the interaction between residual stresses and crack driving force. Blunt notched CT specimens were pre-strained to introduce residual stresses at the notch, where a crack is subsequently introduced. FE modelling is used to model the specimen preload and pre-cracking. Modelling predictions are validated by two different methods. The total predicted surface residual strains are compared to image correlation measurements. The predicted residual strains were measured using neutron diffraction, both before and after fatigue cracking. The residual strain profiles show good agreement with the 3D FE model in the far field but the peak strains measured near the notch are smaller those predicted. This is a result of the low spatial resolution of the technique.
    Original languageEnglish
    Title of host publicationMaterials Science Forum|Mater Sci Forum
    Pages77-82
    Number of pages5
    Volume524-525
    DOIs
    Publication statusPublished - 2006
    Event7th European Conference on Residual Stresses, ECRS 7 - Berlin
    Duration: 1 Jul 2006 → …
    http://<Go to ISI>://000241187200021

    Publication series

    NameMaterials Science Forum
    PublisherTrans Tech Publications Ltd.
    ISSN (Print)0255-5476

    Other

    Other7th European Conference on Residual Stresses, ECRS 7
    CityBerlin
    Period1/07/06 → …
    Internet address

    Keywords

    • Crack driving force
    • Finite element
    • Image correlation
    • J-integral
    • Neutron diffraction
    • Pre-loading, blunt notched CT

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