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An experimental method to obtain the elastic strain energy function from torsion-tension testsIt is shown that by employing a torsion-tension test, it is possible to have a complete mapping near the origin of the two principal strain invariants associated with the rate of change of the strain energy function. However, the mathematical representation of the twist moment and normal forces vs strain and the strain energy function are complex. This problem is solved by using a set of solid cylindrical bars with different diameters such that the difference in diameter of two successive bars is small. The stress-strain equations can be grossly oversimplified by considering differences in twist moment and normal force as a function of difference in radius.
Document ID
19760053425
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Peng, S. T. J.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Landel, R. F.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena Calif., United States)
Date Acquired
August 8, 2013
Publication Date
May 1, 1976
Publication Information
Publication: Japanese Journal of Applied Physics
Volume: 15
Subject Category
Structural Mechanics
Accession Number
76A36391
Funding Number(s)
CONTRACT_GRANT: NAS7-100
Distribution Limits
Public
Copyright
Other

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