Iosipescu shear characterization of polymeric and metal matrix composites |
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| Authors: | M. J. Pindera P. Ifju D. Post |
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| Affiliation: | (1) Civil Engineering Department, University of Virginia, 22901 Charlottesville, VA;(2) Engineering Science and Mechanics Department, Virginia Polytechnic Institute and State University, 24061 Blacksburg, VA |
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| Abstract: | The paper outlines the results of an experimental/analytical investigation of deformation and stress fields in the test section of graphite/epoxy and boron/aluminum Iosipescu specimens using high-resolution moiré interferometry and finite-element analysis. Very good correlation between experimental and analysis is demonstrated for the graphite/epoxy speciments. This, in turn, justifies the use of correction factors employed in the previous investigations to eliminate differences in the inital shear moduli obtained from 0-deg and 90-deg losipescu specimens. The significant discrepancies observed in the case of boron/aluminum specimens are attributed to localized yielding at the notch tips caused by the clamping action, the associated in-plane bending effects and changing boundary conditions due to slippage in the grips.Paper was presented at the 1989 SEM Spring Conference on Experimental Mechanics held in Cambridge, MA on May 28–June 1. |
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