Constancy of the Tensile Test Machine Stiffness

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Volume 4, Issue 4 (July 1976)

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ISSN: 0090-3973
Page Count: 3

Constancy of the Tensile Test Machine Stiffness
Fortes, MA
Research metallurgists, Laboratório de Física e Engenharia Nucleares,

Proença, JG

Abstract

A method is presented for determining the current value of the stiffness of a tensile machine during uniaxial loading tests. The method is based on stress relaxation tests and on the measurement of the slopes of the load-time curve at the moment when the crosshead speed is changed from zero to some finite value. This method has shown that the stiffness can be taken as a constant within fairly wide ranges of the load level, crosshead speed, and specimen dimensions.

Keywords:
mechanical tests, stress relaxation tests, strain rate, tensile machine stiffness

Paper ID: JTE10208J
DOI: 10.1520/JTE10208J
ASTM International is a member of CrossRef.

Author Title Constancy of the Tensile Test Machine Stiffness Symposium , 0000-00-00 Committee E28

		Home Journals STPs Manuals Topics Subscriptions/Pricing Digital Library / Journals / Journal of Testing and Evaluation (JTE) / Citation Page Volume 4, Issue 4 (July 1976) Click here to download this paper now for $25 PDF (144K) View License Agreement ISSN: 0090-3973 Page Count: 3 Constancy of the Tensile Test Machine Stiffness Fortes, MA Research metallurgists, Laboratório de Física e Engenharia Nucleares, Proença, JG Abstract A method is presented for determining the current value of the stiffness of a tensile machine during uniaxial loading tests. The method is based on stress relaxation tests and on the measurement of the slopes of the load-time curve at the moment when the crosshead speed is changed from zero to some finite value. This method has shown that the stiffness can be taken as a constant within fairly wide ranges of the load level, crosshead speed, and specimen dimensions. Keywords: mechanical tests, stress relaxation tests, strain rate, tensile machine stiffness Paper ID: JTE10208J DOI: 10.1520/JTE10208J ASTM International is a member of CrossRef. Author Title Constancy of the Tensile Test Machine Stiffness Symposium , 0000-00-00 Committee E28