Stress Analysis from Temperature Data

    Volume 6, Issue 6 (November 1978)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Page Count: 7


    Jordan, EH
    Research assistant and professorMembers of ASTM, University of Wisconsin, Madison, Wis.

    Sandor, BI
    Research assistant and professorMembers of ASTM, University of Wisconsin, Madison, Wis.

    Abstract

    A measurement system for monitoring temperature change during mechanical deformation is described. The system is based on thermocouples welded directly to the specimen and is capable of distinguishing temperatures smaller than 0.1°C with a response time less than 0.01 s. An equation to relate temperature change to mechanical variables is stated and experimentally verified. The scalar quantity temperature can be used in stress analysis to determine other scalar quantities related to stress or both stress and plastic strain. Three methods are proposed for analyzing temperature data. The methods are discussed in terms of the basic equation and are experimentally verified. A key element in these methods is the use of rapid loading and rapid data collection that results in data not appreciably altered by heat conduction. Collectively these methods can be used to detect plastic strains as small as 0.0003 m/m in mild steel, to determine magnitudes of specific plastic work, and to determine pressure for elastic deformation. This paper discusses the theoretical and experimental foundations for techniques potentially useful to the study of notched members.


    Paper ID: JTE10575J

    DOI: 10.1520/JTE10575J

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    Author
    Title Stress Analysis from Temperature Data
    Symposium , 0000-00-00
    Committee E20