Results 1 to 10 of about 5,494,240 (282)
Applied Mechanics and Materials, 2011 In order to study on rock damage caused by the confining pressure unloading, different unloading rates have been adopted in tests on the rock under the constant axial load. Emphasis has been laid on discussing influences of different unloading rates on the elastic modulus, rock strength and failure mode of the rock.
Wen Ge Chai, Wen Li Li
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Heart rate limitation and cardiac unloading in sevoflurane post‐conditioning
Acta Anaesthesiologica Scandinavica, 2011BackgroundSevoflurane post‐conditioning (SePost) has been found to alleviate ischemic myocardial reperfusion injury through the activation of prosurvival kinases. Lowered myocardial oxygen demand from reduced cardiac work may also contribute to cardioprotection, and is much less well‐studied. Our aim was to examine the simultaneous effects of SePost on
Larsen, Jens Kjærgaard Rolighed; id_orcid 0000-0003-0694-0135 +4 more
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Time effects in loading and unloading at high rates
Strength of Materials, 1992The results are presented of experimental examination of time effects in loading and unloading at moderately high rates light alloys (VT1-1 titanium and D16 aluminum alloy) characterized by typical rheonomical and scleronomical properties. It is shown that the dynamic yield limit in unloading may greatly exceed the static yield limit. Consequently, the
V. V. Viktorov, A. B. Mosolov
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The rate of swelling of overconsolidated clays subjected to unloading
Géotechnique, 1978Time-rate of swelling under one-dimensional drainage and either one-dimensional or isotropic deformation conditions was investigated using reconstituted specimens of Duck Creek. Crab Orchard, Cucaracha aid Bearpaw shales. Cylindrical specimens were used, drainage was allowed from the top, and pore water pressure was measured at the base of all ...
G. Mesri, C. R. Ullrich, Y. K Choi
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Numerical Study of the Influences of Dynamic Loading and Unloading Rates on Fracturing
57th U.S. Rock Mechanics/Geomechanics Symposium, 2023ABSTRACT Dynamic loading offers the potential to induce densely connected fractured pore space over large bulk volumes of impermeable rock. An understanding of the impacts of the dynamic loading and unloading rates on the resulting fracturing can guide the design of discharge technologies.
Wen Cao, Rami M. Younis
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Impact of Direction of Unloading Influence on Template Rate of Perceived Exertion
Journal of Strength and Conditioning Research, 2018Abstract Greer, BK, Young, PR, Thompson, B, Rickert, BJ, and Moran, MF. Impact of direction of unloading influence on template rate of perceived exertion. J Strength Cond Res 32(12): 3407–3413, 2018—It is suggested that exercisers engage in a process of teleoanticipation and create an exercise template based on previous experience with the ...
Beau Kjerulf, Greer +4 more
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Rock Mechanics and Rock Engineering, 2013
Rockburst is a sudden and violent failure of rocks and it often occurs in hard rocks in highly stressed ground. Strainburst is classified as one type of rockburst and it often occurs in rocks near or at the excavation boundary. Deep insight into the strainburst phenomenon is essential for safe underground construction at depth.
X. G. Zhao +7 more
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Rockburst is a sudden and violent failure of rocks and it often occurs in hard rocks in highly stressed ground. Strainburst is classified as one type of rockburst and it often occurs in rocks near or at the excavation boundary. Deep insight into the strainburst phenomenon is essential for safe underground construction at depth.
X. G. Zhao +7 more
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Effects of Unloading and Strain Rate on Headform Impact Simulation
SAE Technical Paper Series, 2004<div class="htmlview paragraph">The current paper presents improvements of a previous single-degree-of-freedom lumped parameter model with a nonlinear spring that could be used for preliminary design of headform impact safety countermeasures for normal impact with negligible headform rotation.</div> <div class="htmlview paragraph">The
Anindya Deb +2 more
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SPE Trinidad and Tobago Section Energy Resources Conference, 2021
Abstract The unconventional resources development has grown tremendously as a result of the advancement in horizontal drilling technology coupled with hydraulic fracturing. However, as more wells are drilled and fractured close to each other, frac hits have become a major challenge in these wells.
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Abstract The unconventional resources development has grown tremendously as a result of the advancement in horizontal drilling technology coupled with hydraulic fracturing. However, as more wells are drilled and fractured close to each other, frac hits have become a major challenge in these wells.
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The influence of the unloading rate on creep recovery of force transducers
Measurement, 2018Abstract This paper presents a study of the effect of unloading rate on the creep recovery of force transducers. The creep values increase with increase loading rate and this increasing phenomenon follows a Natural Logarithm function. The creep is highly dependent on the unloading rate from 0.5 mm/min to 5 mm/min while above 5 mm/min up to 20 mm/min ...
K.M. Khaled, G.M. Mahmoud
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