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Application of the V-Notch Shear Test as Applied to Unidirectional Hybrid Composites



H Jianmei, Martin Chiang, Donald L. Hunston


The modified Wyoming test fixture (ASTM D5379-93) with doubly v-notched specimens was investigated as a mean for determining the in-plane shear modulus and strength of unidirectional hybrid composites. Two types of hybrid systems having different fiber-tow volume fractions composed of carbon and glass fiber tows with epoxy matrix are employed in this study. A fiber-tow based finite element analysis was also used to simulate the v-notch shear test for characterizing stress/strain distributions of the specimen. The good agreement found between experiments and analysis suggests that the v-notch shear test is a viable mean for determining the elastic shear modulus of unidirectional hybrid composites. On the other hand, the use of this specimen for shear determination is questionable as no failure in the test region occurred in the specimens. Therefore, at this stage, we conclude that the v-notch shear test is only useful for the evaluation of the shear modulus, but not the shear strength, of the unidirectional hybrid composites. This study suggests that more detailed shear strength measurements of hybrid composites are needed.
Society for Experimental Mechanics
Iss. 23


carbon/glass tows, finite element modeling, hybrid composites, iosipescu shear test, shear properties, V-notch specimen


Jianmei, H. , Chiang, M. and Hunston, D. (2003), Application of the V-Notch Shear Test as Applied to Unidirectional Hybrid Composites, Society for Experimental Mechanics, [online], (Accessed July 24, 2024)


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Created December 31, 2002, Updated October 12, 2021