Results 231 to 240 of about 14,526 (258)
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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 ...
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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 ...
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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 +2 more
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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 +2 more
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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.
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Impact of fibular torsion and rotation on chronic ankle instability
Foot and Ankle Surgery, 2014The fibula is known not to involve in transmission of weight but known simply as an ankle stabilizer. However, its main function in stabilizing the ankle remains obscure. Since the fibula has an impact on torsion and rotation of the ankle, its effect on lateral ankle instability should be investigated.Twenty patients with lateral ankle instability ...
Tubbs, Shane R. +7 more
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Torsion in Quadrupeds and Its Impact on Mammalian Joints
Clinical Orthopaedics and Related Research, 1994Congenital and acquired torsion occur in the limbs of domestic animals. Congenital abnormalities are of clinical significance in foals; they are also seen in calves whose dams have ingested certain toxic plants that contain teratogenic agents. Acquired torsional deformities are most common in foals, but are also observed in adult horses, dogs, and ...
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Impact of shaft torsionals in steam turbine control
IEEE Transactions on Energy Conversion, 1989Shaft torsional vibrations are discussed along with their effect on steam turbine-generator control following severe supply-network disturbances and the destabilization of shaft torsional modes through the action of high-speed electrohydraulic controllers.
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Impact of Torsional and Bending Inertia on Root Canal Instruments
Journal of Endodontics, 2001The laws of applied mechanics can be used to analyze and predict the behavior of mechanical parts subjected to strain and distortion, such as endodontic instruments. Simple mathematical formulas can be used to represent the impact of torsional and bending inertias on stresses in endodontic instruments being used in root canals.
Y L, Turpin +4 more
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Nonlinear oscillations of the torsion oscillator with impact masses
1997This paper deals with nonlinear oscillations of the torsion oscillator with reciprocal rigidly connected impact masses. It is assumed that two impulses occur at one interval of the disturbing torsion moment. The asymptotic Krilow-Bogolyubov-Mitropolyskiy method is applied, along with the stereomechanical impact theory for the inclusion of impact ...
Mitić, Saša, Hedrih, K.
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A Side-Impact Torsion Kolsky Bar
Experimental Mechanics, 2015B. J. Claus +3 more
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