Results 271 to 280 of about 9,186,870 (338)
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Experimental Mechanics, 1972
A torsional-impact machine has been developed to investigate the dynamic behavior of metals at large strains and high strain rates. Two machines are described; the first was used to continuously monitor stress, strain profile and temperature profile during deformation; the second was designed specifically to investigate the thermal-instability strain ...
R. S. Culver
semanticscholar +2 more sources
A torsional-impact machine has been developed to investigate the dynamic behavior of metals at large strains and high strain rates. Two machines are described; the first was used to continuously monitor stress, strain profile and temperature profile during deformation; the second was designed specifically to investigate the thermal-instability strain ...
R. S. Culver
semanticscholar +2 more sources
Impact of torsional micropulse on phacoemulsification efficiency and chatter.
Canadian Journal of Ophthalmology, 2019OBJECTIVE Evaluate the effect of increasing ultrasound (US) power on chatter events and efficiency under both continuous and micropulse torsional US to reduce total cataract extraction times. DESIGN In vitro laboratory study.
S. Kabbara +7 more
semanticscholar +3 more sources
Torsional impact of elastic spheres
Archive of Applied Mechanics, 1994The collision of two geometrically and materially similar elastic spheres, which are rotating around the common normal of their contact area, is analysed. The torsional rotation at the end of impact is obtained from numerical integration of the angular equation of motion and the contact law.
J. Jäger
semanticscholar +3 more sources
Torsional Constraints of DNA Substrates Impact Cas9 Cleavage.
Journal of the American Chemical Society, 2016To examine the effect of the torsional constraints imposed on DNA substrates on Cas9 cleavage, we prepared constrained DNA substrates using a DNA origami frame. By fixing the dsDNA at the connectors of the DNA frame, we created torsionally constrained or relaxed substrates.
Michael H Räz +4 more
semanticscholar +3 more sources
Characterization of Carbonate Rock Fragmentation Under Torsional Impact Loading
58th U.S. Rock Mechanics/Geomechanics SymposiumIn order to study the influence of torsional impact technology on rock stress response, cutting force and other parameters of carbonate rock under different impact amplitude and impact frequency, the crushing test of carbonate rock was carried out by
Zhaohui Xu +7 more
semanticscholar +2 more sources
Journal of Vibration and Acoustics, 2016
Violent drillstring vibrations in a well should be suppressed to prevent premature failure of the drillstring parts and borehole wall and enhance the drilling process. This paper presents novel centralized impact dampers and torsional vibration dampers for lateral and torsional stick–slip vibration suppression which will function well in the harsh ...
Lingnan Hu, A. Palazzolo, M. Karkoub
semanticscholar +2 more sources
Violent drillstring vibrations in a well should be suppressed to prevent premature failure of the drillstring parts and borehole wall and enhance the drilling process. This paper presents novel centralized impact dampers and torsional vibration dampers for lateral and torsional stick–slip vibration suppression which will function well in the harsh ...
Lingnan Hu, A. Palazzolo, M. Karkoub
semanticscholar +2 more sources
SPE Journal, 2023
A high-frequency axial-torsional composite percussion drilling tool is designed to enhance the drilling efficiency by delivering high-frequency axial and torsional impact loads directly to the drill bit.
Haili Yang +4 more
semanticscholar +1 more source
A high-frequency axial-torsional composite percussion drilling tool is designed to enhance the drilling efficiency by delivering high-frequency axial and torsional impact loads directly to the drill bit.
Haili Yang +4 more
semanticscholar +1 more source
, 2021
Modern industrial requirements are continuously demanding better performance, smaller clearance, higher rotational speed and higher load from hydraulic generating set, under this circumstance, vibration mitigation is of considerable importance for safe ...
Jinjian Zhang +5 more
semanticscholar +1 more source
Modern industrial requirements are continuously demanding better performance, smaller clearance, higher rotational speed and higher load from hydraulic generating set, under this circumstance, vibration mitigation is of considerable importance for safe ...
Jinjian Zhang +5 more
semanticscholar +1 more source
, 2021
Superelastic shape memory alloy (SE-SMA) becomes an emerging structural material in earthquake engineering to improve the seismic performance of structures located in high seismic zones.
Emad Abraik
semanticscholar +1 more source
Superelastic shape memory alloy (SE-SMA) becomes an emerging structural material in earthquake engineering to improve the seismic performance of structures located in high seismic zones.
Emad Abraik
semanticscholar +1 more source
Saccular impact on ocular torsion
Brain Research Bulletin, 1996When someone is tilted laterally, the shear force on the maculae of the utriculus and the sacculus is described by the sine and the cosine of the angle of tilt, respectively. So both the sacculus and the utriculus are stimulated, but in the literature, ocular torsion is normally attributed to utricular function alone (and, thus, seen as a response to y-
Graaf, B. de, Bos, J.E., Groen, E.L.
openaire +3 more sources