Digital image correlation (DIC) is a technique in experimental mechanics to acquire full-field measurement data of displacements and deformations from the surface of specimens or components. Especially for the investigations of cracks it provides additional benefits. The actually present deformation field in the vicinity of the crack tip can be obtained which directly reflects for example crack closure effects or plasticity. Against this background the paper summarizes a procedure to compute the J integral and the stress intensity factors KI and KII based on DIC data. For this purpose the J and interaction integral are computed as line and domain integrals. Through experiments it is shown that the domain integral is less affected by scatter of the DIC data. Furthermore, the specific domain, facet sizes and facet distances slightly influence the results.


    Access

    Download


    Export, share and cite



    Title :

    Determination of stress intensity factors and J integral based on digital image correlation


    Contributors:


    Publication date :

    2019-07-01



    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Evaluation using digital image correlation of stress intensity factors in an aerospace panel

    Du, Y. / Diaz, F.A. / Burguete, R.L. et al. | Tema Archive | 2011


    Multi-Material Printing Integral Digital Image Correlation Patterns

    Pankonien, Alexander M. / Durscher, Ryan / Deaton, Joshua D. et al. | AIAA | 2018


    Photoelastic determination of fatigue crack stress intensity factors [2001-19]

    Nurse, A. D. / Patterson, E. A. / SPIE | British Library Conference Proceedings | 1993


    An Interaction Integral Formulation for Computing Stress Intensity Factors Along Curved Bimaterial Interface Cracks

    Gosz, M. R. / Moran, B. / Dolbow, J. E. | British Library Online Contents | 1996


    Multi-Material Printing Integral Digital Image Correlation Patterns (AIAA 2018-3801)

    Pankonien, Alexander M. / Durscher, Ryan / Deaton, Joshua D. et al. | British Library Conference Proceedings | 2018