Volume 27, Issue 4 (July 1999)

    Evaluating the Quality of a Mechanical Testing System Using Displacement Field Contours

    (Received 9 September 1998; accepted 5 May 1999)

    CODEN: JTEOAD

      Format Pages Price  
    PDF Version 6 $25   ADD TO CART


    Abstract

    A technique using displacement field data to qualify mechanical tests for in-plane deformation is proposed. Contour lines of the displacement fields that result from applied forces in mechanical tests are used for quantitative analysis and graphical representation of quality of the mechanical testing system in the tests. This method can visually, directly, and sensitively detect loading problems, such as misalignment, existing in the tests. A theoretical analysis using a displacement contour map to describe quantitatively the effect of the misalignment in a uniaxial tension test is described in detail. A technique to obtain the displacement contour map from the displacement field data and on-line inspection of some test system misalignment is presented. Several examples, including an eccentric tension test, a tension test with inhomogeneous fixing of a specimen in the grips, and an Iosipescu composite shear test with various degrees and sources of misalignment are analyzed with this contour method.


    Author Information:

    Zhao, B
    Research fellowassociate professor, Nanyang Technological University,

    Asundi, A
    Research fellowassociate professor, Nanyang Technological University,


    Stock #: JTE12226J

    ISSN: 0090-3973

    DOI: 10.1520/JTE12226J

    ASTM International is a member of CrossRef.

    Author
    Title Evaluating the Quality of a Mechanical Testing System Using Displacement Field Contours
    Symposium , 0000-00-00
    Committee D30