You are being redirected because this document is part of your ASTM Compass® subscription.
    This document is part of your ASTM Compass® subscription.

    If you are an ASTM Compass Subscriber and this document is part of your subscription, you can access it for free at ASTM Compass
    STP1208

    A Comparison of Automated Versus Manual Measurement of Total Elongation-Tension Testing

    Published: 01 January 1993


      Format Pages Price  
    PDF (228K) 10 $25   ADD TO CART
    Complete Source PDF (2.2M) 110 $55   ADD TO CART

    Cite this document

    X Add email address send
    X
      .RIS For RefWorks, EndNote, ProCite, Reference Manager, Zoteo, and many others.   .DOCX For Microsoft Word


    Abstract

    A study was conducted to compare two methods of determining the total percent elongation from standard tension tests. For each test, total percent elongation was measured by two methods: the conventional manually “measured” method where the broken specimen halves are fitted back together after the test, and the automated “extensometer” method where elongation to fracture is determined by an extensometer that is left on the specimen up to the moment of fracture.

    Comparison of “measured” and “extensometer” elongation results reveals excellent agreement between the two methods. The difference between the two elongation values is generally less than 1% elongation, with the measured value normally being higher.

    A model was developed that could be used to predict the “measured” elongation from the “extensometer” elongation to within 1% to 1.5% of the actual “measured” value.

    Keywords:

    uniaxial tension tests, mechanical properties, total percent elongation, automated tension tests, variability


    Author Information:

    Scherrer, DK
    Engineer, Research and Technology, Armco, Inc., Middletown, OH


    Committee/Subcommittee: E28.04

    DOI: 10.1520/STP19266S