Results 131 to 140 of about 1,821 (184)
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Thickness effects in split Hopkinson pressure bar tests
Polymer, 1993Abstract Results are presented for the high strain rate behaviour of a medium and high density polyethylene, polycarbonate and poly(ether ether ketone) in compression for strain rates up to 104s−1 obtained using a split Hopkinson pressure bar apparatus.
N.N Dioh, P.S Leevers, J.G Williams
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Dispersion Investigation in the Split Hopkinson Pressure Bar
Journal of Engineering Materials and Technology, 1990Dispersion 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
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Wave Propagation in the Split Hopkinson Pressure Bar
Journal of Engineering Materials and Technology, 1983Elastic 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
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Dynamic photoelasticity with a split Hopkinson pressure bar
19th Intl Congress on High-Speed Photography and Photonics, 1991To 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
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Split-Hopkinson Pressure Bar Testing of Unsaturated Sand
Geotechnical Testing Journal, 1990Abstract High amplitude, split-Hopkinson pressure bar (SHPB) laboratory tests were conducted on compacted specimens of 50/80 silica sand to evaluate the influence of saturation on compressional-stress wave velocity, stress transmission, and attenuation. Stress wave velocity and transmitted stress increase as the saturation increases from
WA Charlie, CA Ross, SJ Pierce
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Split Hopkinson pressure bar experiments on polymeric foams
International Journal of Vehicle Design, 2005Proper 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.
B. Song, W. Chen, X. Jiang
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Round-Robin test of split Hopkinson pressure bar
International Journal of Impact Engineering, 2019Abstract A Round-Robin test using split Hopkinson pressure bars (SHPBs) has been conducted by four universities: Swinburne University of Technology (SUT), Australia; University of Sao Paulo (USP), Brazil; University of Cape Town (UCT), South Africa; and Nanyang Technological University (NTU), Singapore. Each university had different sets of SHPBs and
Muhammad A. Kariem +8 more
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Split-Hopkinson pressure bar tests on pure tantalum
AIP Conference Proceedings, 1998Pure tantalum (Ta) was loaded in compression by a split-Hopkinson pressure bar (SHPB) to strain rates from 450 to 6350 s−1. The results are compared with SHPB data for commercial Ta and with predictions from the constitutive model for Ta developed by Zerilli and Armstrong (Z-A). The main conclusions are: (1) the flow stress versus log strain rate agree
Richard D. Dick +2 more
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Dynamic Characterization of Concrete using Split Hopkinson Pressure Bar
ASPS Conference Proceedings, 2022Concrete exhibits brittle behaviour and is weak under tensile and flexural loading. The response of concrete to dynamic loading is of interest in a variety of civilian and military applications. Understanding the response of concrete to impact or explosive loading is important for effective protection of defence and civil structures.
Kavita Ganorkar +4 more
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A polymeric split Hopkinson pressure bar instrumented with velocity gages
Experimental Mechanics, 2003Polymeric 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
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