On the development of a high strain-rate tensile testing method for thin low-impedance materials

Description

This work deals with the high strain-rate characterization of paper under uniaxial tension using a Split Hopkinson
test bench. An aluminum bar system featuring a highly sensitive hollow transmission bar was used. Paper
tests were performed in a strain-rate range between approximately 60 s􀀀 1 and 210 s􀀀 1. The experimental tests
showed that the breaking strength appears to decrease with increasing strain-rate. To verify these results, a
digital twin of both the paper specimen and the entire test rig was created in an explicit Finite Element method
environment. The numerical model was then used to perform a parameter study with different types of transmission
bars. It was shown that the system is quite sensitive to additional masses caused by the specimen fixtures,
as well as to drastic reductions in the cross section of the transmission bar. As a result, the transmitted measuring
signal can be distorted and may need to be corrected using the digital twin.

Period	27 Nov 2023 → 29 Nov 2023
Event title	27th Dynamic behaviour of soft and low density materials Technical Meeting: DYMAT 2023
Event type	Conference
Location	Colmar, FranceShow on map
Degree of Recognition	International