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A shear-compression specimen for large strain testing

Rittel, D. and Lee, S. and Ravichandran, G. (2002) A shear-compression specimen for large strain testing. Experimental Mechanics, 42 (1). pp. 58-64. ISSN 0014-4851.

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A new specimen geometry, the shear-compression specimen (SCS), has been developed for large strain testing of materials. The specimen consists of a cylinder in which two diametrically opposed slots are machined at 45° with respect to the longitudinal axis, thus forming the test gage section. The specimen was analyzed numerically for two representative material models, and various gage geometries. This study shows that the stress (strain) state in the gage, is three-dimensional rather than simple shear as would be commonly assumed. Yet, the dominant deformation mode in the gage section is shear, and the stresses and strains are rather uniform. Simple relations were developed and assessed to relate the equivalent true stress and equivalent true plastic strain to the applied loads and displacements. The specimen was further validated through experiments carried out on OFHC copper, by comparing results obtained with the SCS to those obtained with compression cylinders. The SCS allows to investigate a large range of strain rates, from the quasi-static regime, through intermediate strain rates (1–100 s^(−1)), up to very high strain rates (2×10^4s^(−1) in the present case).

Item Type:Article
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Ravichandran, G.0000-0002-2912-0001
Additional Information:© 2002 Springer International Publishing AG. Original manuscript submitted: August 17, 2000. Final manuscript received: September 24, 2001.
Subject Keywords:shear; large strain; testing; shear-compression specimen
Issue or Number:1
Record Number:CaltechAUTHORS:20150227-154619963
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:55351
Deposited By: Cheryl Gause
Deposited On:03 Mar 2015 00:42
Last Modified:09 Mar 2020 13:19

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