Results 131 to 140 of about 1,938 (182)

Split Hopkinson pressure bar experiments on polymeric foams

International Journal of Vehicle Design, 2005
Proper modifications are required when a split Hopkinson pressure bar (SHPB) is used to determine the dynamic compressive properties of polymeric foams. Pulse shaping is necessary to ensure valid testing conditions: constant strain-rate deformation under dynamically equilibrated stresses, which need to be experimentally verified.
Baolin Song
exaly   +2 more sources

Split-Hopkinson Pressure Bar Test of Silicone Rubber: Considering Effects of Strain Rate and Temperature [PDF]

Polymers, 2022
Zhu X, Zhang X, Yao W, Li W.
exaly   +2 more sources

Dispersion Investigation in the Split Hopkinson Pressure Bar

Journal of Engineering Materials and Technology, 1990
Dispersion of an elastic wave propagating in a 76.2-mm-diameter (3 in.) Split Hopkinson Pressure Bar system was investigated with two consecutive pulses recorded in the transmitter bar. Assuming that the dispersive high frequency oscillatory components riding on the top of the main pulse originate from the first mode vibration, the dispersion was ...
J. C. Gong, L. E. Malvern, D. A. Jenkins
openaire   +1 more source

Dynamic photoelasticity with a split Hopkinson pressure bar

19th Intl Congress on High-Speed Photography and Photonics, 1991
To observe the behaviour of materials subject to impact shock loads, accurate high frequency measurements are vital. The measurement of ultra short pulses (less than 50 microseconds) can be carried out by means of electrical resistance strain guages (ERSGs) . The ERSG's also pick up electromagnetic interference signals. Dynamic photoelasticity was
David R. Morris, A. J. Watson
openaire   +1 more source

On the use of a viscoelastic split hopkinson pressure bar

International Journal of Impact Engineering, 1997
To test weak materials such as foams at high strain rates, the use of a Split Hopkinson Pressure Bar (SHPB) setup made of low impedance bars, which are mostly viscoelastic, is indispensable. In this paper a detailed study of the technical problems of such a viscoelastic setup related to the measurement and to the loading conditions is offered.
Zhao, H., Gary, Gérard, Klepaczko, Janusz, R   +2 more
openaire   +2 more sources

Wave Propagation in the Split Hopkinson Pressure Bar

Journal of Engineering Materials and Technology, 1983
Elastic wave propagation in the split Hopkinson pressure bar (SHPB) is discussed with an emphasis on the origin and nature of the oscillations that often trail the leading edge of the pressure wave. We show that in the conditions of the SHPB test the pressure bars vibrate in the fundamental mode and that elastic wave propagation can be fully described ...
P. S. Follansbee, C. Frantz
openaire   +1 more source

A polymeric split Hopkinson pressure bar instrumented with velocity gages

Experimental Mechanics, 2003
Polymeric split Hopkinson pressure bars are often used to test low-impedance materials at elevated strain rates. However, they tend to be viscoelastic, and a viscoelastic wave propagation model is required to analyze the data. This considerably complicates the analysis over the more common linear elastic split Hopkinson bar.
D.T. Casem, W.L. Fourney, P. Chang
openaire   +1 more source

Split Hopkinson Pressure Bar Graphical Analysis Tool

Experimental Mechanics, 2016
An open-source Split Hopkinson Pressure Bar graphical data analysis tool has been developed. Written in Matlab®, the code can be freely distributed either as an executable binary or editable Matlab files. Beginning with raw voltages from two strain gages along with the incident/transmitted bars’ mechanical and geometrical properties, the user can ...
D.K. Francis, W.R. Whittington, W.B. Lawrimore, P.G. Allison, S.A. Turnage, J.J. Bhattacharyya   +5 more
openaire   +1 more source