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High-rate in-plane shear testing of CFRP using the Split Hopkinson tension bar

: Ledford, Noah; Imbert, Mathieu; May, Michael


American Institute of Aeronautics and Astronautics -AIAA-, Washington/D.C.; Aerospace Research Central -ARC-:
AIAA Scitech Forum 2021 : 11-15 & 19-21 January 2021, Virtual Event
Reston, Va.: AIAA, 2021
ISBN: 978-1-62410-609-5
Paper AIAA 2021-0167, 8 S.
Science and Technology Forum and Exposition (SciTech Forum) <2021, Online>
European Commission EC
H2020; CS2-AIR-GAM-2019; Clean Sky 2
Fraunhofer EMI ()
high strain rate; woven composites; carbon fiber reinforced plastics

The high-rate in-plane shear properties of IM7/8552 composite material was investigated using a Split Hopkinson Tension Bar featuring constant impedance mountings in order to maximize the quality of the load signal. The in-plane shear response up to failure was evaluated using Digital Image Correlation (DIC) and correction terms for fiber rotation. The in-plane shear strength was found to increase from 80 MPa for quasi-static loading conditions to 175 MPa for a strain rate of 2600 s-1.