Journal Published Online: 01 November 1978
Volume 6, Issue 6

Stress Analysis from Temperature Data

CODEN: JTEVAB

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.

Author Information

Jordan, EH
University of Wisconsin, Madison, Wis.
Sandor, BI
University of Wisconsin, Madison, Wis.
Pages: 7
Price: $25.00
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Stock #: JTE10575J
ISSN: 0090-3973
DOI: 10.1520/JTE10575J