Volume 9, Issue 6 (November 1981)

    An Evaluation of a Load-Line Extensometer for Elastic-Plastic Fracture Toughness Testing

    CODEN: JTEOAD

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    Abstract

    A load-line extensometer using linear variable differential transformer (LVDT) displacement transducers was developed and evaluated for use in multispecimen and single specimen J value versus crack growth (J-R) curve testing. The LVDT extensometer accuracy and repeatability was compared with that of clip gage extensometers commonly used in fracture toughness evaluatons. Data on load versus displacement and J value versus crack growth for ASTM A533, Grade B, Class 1 (Unified Numbering System [UNS] K12539) steel obtained by using both extensometers were also compared.


    Author Information:

    Williams, JA
    Senior research engineer and advanced engineermembers of ASTM, W/A-124, Westinghouse Hanford Co., Richland, Wash.

    Carlson, KW
    Senior research engineer and advanced engineermembers of ASTM, W/A-124, Westinghouse Hanford Co., Richland, Wash.


    Stock #: JTE11235J

    ISSN: 0090-3973

    DOI: 10.1520/JTE11235J

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    Author
    Title An Evaluation of a Load-Line Extensometer for Elastic-Plastic Fracture Toughness Testing
    Symposium , 0000-00-00
    Committee E08