Displacement and Strain Fields at a Stone/Mortar Interface by Digital Image Processing

    Volume 29, Issue 2 (March 2001)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Page Count: 8


    Raffard, D
    Doctor, CMGD, Ecole des Mines d'Alès, Alès,

    Ienny, P
    Doctor, CMGD, Ecole des Mines d'Alès, Alès,

    Henry, J-P
    Professor, CMGD, Ecole des Mines d'Alès, Alès,

    (Received 15 February 2000; accepted 20 November 2000)

    Abstract

    This work is part of a study of historical masonry behavior. It deals with the homogenization of periodic and heterogeneous structures like masonry, which is composed of stones linked by joints of mortar. Combined compressive-shearing tests were performed in order to study the mortar interface behavior. Deformation properties were measured, locally, by an optical extensometer. Like the speckle method, this principle uses digital image correlation processing. Compared to the volume of the joint, the size of aggregates induces heterogeneities. An experimental protocol is proposed to determine homogenous deformation according to joint width and localized deformation according to joint height. This approach accurately characterizes the interface at a microscale level and enhances high compaction strain at the interface.


    Paper ID: JTE12237J

    DOI: 10.1520/JTE12237J

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    Author
    Title Displacement and Strain Fields at a Stone/Mortar Interface by Digital Image Processing
    Symposium , 0000-00-00
    Committee D01