Wednesday  |  Monongahela  |  05:20 PM–05:40 PM

#13691, Experimental Techniques for Shear Behavior of Unidirectional Composite Materials

Carbon Fiber Reinforced Polymers (CFRPs) have drawn the attention of automotive manufacturers for their strong and lightweight characteristics. Testing of CFRP material is important to learn the mechanical properties of the material and support CAE efforts to develop and optimize new automotive components. Experimental techniques for in-plane shear properties are particularly difficult to determine, especially under dynamic loading conditions. Techniques used to determine the shear behavior in the 1-2 direction at different strain rates are presented in this paper. A V-notch sample is designed and suggested, and 1-2 shear tests are conducted at nominal strain rates of 0.001 s-1, 1 s-1, 100 s-1, and 1000 s-1. Adapters are designed to apply proper constraints to the specimen so that the gage section of the specimen primarily is subjected to a simple shear stress state. An axial-torsional Instron hydraulic load frame is used for quasi-static shear tests while dynamic tests are conducted on a torsion split-Hopkinson bar (SHB) apparatus. The experimental data shows that 1-2 Shear mechanical properties are strain-rate sensitive. The failure mode of the material is also studied using optical microscopy.

Peiyu Yang   The Ohio State University
Jeremy Seidt   The Ohio State University
Amos Gilat   The Ohio State University