Results 141 to 150 of about 1,821 (184)

Dispersion Correction for Split-Hopkinson Pressure Bar Data

1988
Abstract : Large diameter Split-Hopkinson Pressure Bar (SHPB) systems required a correction of the strain signals to account for wave dispersion. Using a Fast Fourier transform (FFT) algorithm a wave dispersion correction program was developed for the 3.0 inch diameter SHPB at the University of Florida and the 2. 0 inch diameter SHPB at Tyndall AFB FL.
J. C. Gong, E. Jerome, D. A. Jenkins, L. E. Malvern   +3 more
openaire   +1 more source

Some experiments with the split hopkinson pressure bar∗

Journal of the Mechanics and Physics of Solids, 1964
Abstract A n application of the split Hopkinson pressure bar to the dynamic testing of materials is given whereby continuous records of the strain vs. time, strain rate vs. time, stress vs. time, and stress vs. strain may be simultaneously recorded. For many materials a nearly constant true plastic strain rate can be maintained for loading durations
openaire   +1 more source

Probing flexoelectricity via a split Hopkinson pressure bar experiment

Applied Physics Letters, 2018
Flexoelectricity is thought of as a universal property of all dielectric materials that couples polarization with the inhomogeneous deformation. However, at the macroscale, this coupling is usually very weak and the direct observation of flexoelectricity always suffers from a low signal-to-noise ratio (SNR).
Taotao Hu, Qian Deng, Shengping Shen
openaire   +1 more source

A modified split Hopkinson pressure bar for toughness tests

Journal de Physique IV (Proceedings), 2006
In order to characterize material toughness or to study crack arrest under dynamic loading conditions, a new testing device has been developed at CEA/Valduc. A new Split Hopkinson Pressure Bar (SHPB) has been modified: it is now composed of a single incident bar and a double transmitter bar.
N. Granier, T. Grunenwald
openaire   +1 more source

Aufbau und Inbetriebnahme eines Split-Hopkinson Pressure Bar Versuchsstandes

2023
Das Ziel dieser Arbeit ist es einen Versuchsstand für die Untersuchung von Werkstoffeigenschaften unter dynamischen Belastungen, die den Belastungen eines Werkstoffes während der Zerspanung entsprechen, auszulegen und aufzubauen. Anhand einer Literaturrecherche wurden unterschiedliche Verfahren zur dynamischen Werkstoffprüfung betrachtet und anhand ...
openaire   +1 more source

Data processing in the split Hopkinson pressure bar tests

International Journal of Impact Engineering, 1994
Summary The effect on dynamic stress—strain curves of dispersion and shifting of elastic strain pulses travelling in a split Hopkinson pressure bar is reported. The dispersion correction is done in the frequency domain after employing FFT algorithm by adjusting the phase of each Fourier component. The three pulses (incident, reflected and transmitted)
J.M. Lifshitz, H. Leber
openaire   +1 more source

Split Hopkinson pressure bar testing of 3D woven composites

Composites Science and Technology, 2011
Results from a series of split Hopkinson pressure bar (SHPB) tests on 3D woven tetxile composites (3DWC) are presented. These tests were done to determine the rate dependent compression response of 3DWC. Three different configurations of the 3DWC, corresponding to compression response in the plane of the material and through-the-thickness direction ...
M. Pankow, A. Salvi, A.M. Waas, C.F. Yen, S. Ghiorse   +4 more
openaire   +1 more source

TWO-STEP LOADING IN A SPLIT HOPKINSON PRESSURE BAR

AIP Conference Proceedings, 2008
In conventional Split Hopkinson Pressure Bar (SHPB) experiments the striker bar is a single rod and the sample is loaded at one strain rate. In this study, we present results from a system that uses a striker bar formed from two rods of different materials.
Rachel E. Briggs, Daniel R. Drodge, David M. Williamson, William G. Proud, Mark Elert, Michael D. Furnish, Ricky Chau, Neil Holmes, Jeffrey Nguyen   +8 more
openaire   +1 more source

Misalignment effect in the split Hopkinson pressure bar technique

International Journal of Impact Engineering, 2012
Abstract It is well known that alignment of the bar in a split Hopkinson pressure bar (SHPB) experiment plays a significant role in producing a good clean signal. In this paper, numerical simulations using ANSYS-LSDYNA are employed to comprehensively study the effects of bar misalignment in producing a distorted signal.
Kariem, Muhammad A., Beynon, John H., Ruan, Dong   +2 more
openaire   +2 more sources

Split Hopkinson pressure bar experiment simulation using MUNROU

2013
The next generation of 3D combined finite-discrete element method (FDEM) capabilities has been developed at Los Alamos National Laboratory (LANL). These include state of the art contact detection, contact interaction, LANL’s constitutive material, and fracture models all combined in a grand scale parallel computing framework called MUNROU.
Knight, EE, Rougier, E, Sussman, AJ, Broome, ST, Munjiza, A   +4 more
openaire   +2 more sources