ISSN: 0884-6804
Page Count: 6

An Improved Iosipescu Shear Test Fixture
Odom, EM
Master of science graduate student and assistant professor, University of Idaho, ID

Conant, NR
Master of science graduate student and assistant professor, University of Idaho, ID

Abstract

A new Iosipescu shear test fixture design that can be used to perform the test procedure outlined in Test Method for Shear Properties of Composite Materials by the V-Notched Beam Method (ASTM D 5379) was designed, fabricated, and tested. The new fixture solves the often reported problems of specimen twisting, variability of results, and differences in measured shear modulus between [0]¹⁶, [0/90]^4s, and [90]¹⁶ laminates. Lateral instability of the Iosipescu specimen is explored as the main agent causing the undesirable effects observed with the previous fixture design.

Keywords:
Iosipescu fixture, graphite/epoxy composites, twisting, shear testing, instability, shear modulus, shear strain, Iosipescu specimen, front-to-back difference, strain gage

Paper ID: CTR10513J
DOI: 10.1520/CTR10513J
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