Results 31 to 40 of about 14,526 (258)
Energy Reports, 2021 In the present study, a 3D FEM of compound percussive system considering a loading–unloading cycle was employed to simulate the dynamic single-cutter-rock interaction.
Yumei Li +4 more
doaj +1 more source
Development and Field Test of the Same-Frequency Different-Phase Compound Impact Tool
Shiyou jixie, 2023 A same-frequency different-phase compound impact tool was developed to improve the rock-breaking efficiency of PDC bits in hard formations, increase the penetration depth of cutters, and eliminate the “stick-slip” phenomenon of the downhole bit.The ...
Ye Daohui +5 more
doaj
Applied Sciences, 2022 The precision rotary vector reducer with involute variable tooth thickness (PRVT) is a high-performance precision transmission device, which is very suitable for aerospace, medical machinery, industrial robots, automation equipment, and other fields, and
Le Chang +5 more
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Hyperosmotic stress induces PARP1‐mediated HPF1‐dependent mono(ADP‐ribosyl)ation
FEBS Letters, EarlyView.Sorbitol‐induced hyperosmotic stress rapidly induces reversible mono(ADP‐ribosyl)ation (MARylation) on PARP1 without the signs of genotoxic signaling. We show that PARP1 autoMARylation is HPF1 dependent and forms hydroxylamine‐resistant O‐glycosidic linkages.
Anna Georgina Kopasz +11 more
wiley +1 more source
Experimental investigation of torsional vibration isolation using Magneto Rheological Elastomer
MATEC Web of Conferences, 2018 Rotating systems suffer from lateral and torsional vibrations which have detrimental effect on the roto-dynamic performance. Many available technologies such as vibration isolators and vibration absorbers deal with the torsional vibrations to a certain ...
Praveen Shenoy K +3 more
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Shiyou jixie, 2023 Previous researches on rock-breaking efficiency under compound impact neglect the effects of the phase difference between axial and torsional impact loads.Therefor,such effects were discussed.The single-cutter rock-breaking numerical model of PDC bit ...
Xi Yan +5 more
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Impact torsional behavior and strengthening of reinforced concrete spandrel beams
Case Studies in Construction Materials, 2023 The exterior L-shaped spandrel beams frequently experience various forms of eccentric loading that induce torsional stress when used in parking structures.
Noor Ayaad, Nazar Oukaili
doaj +1 more source
Oligothiophene wires: impact of torsional conformation on the electronic structure
Physical Chemistry Chemical Physics, 2016 Different torsional conformations of alkyl-substituted oligothiophenes show nearly identical progressions of particle-in-a-box-like electronic orbitals.
D A, Kislitsyn +7 more
openaire +3 more sources
FEBS Letters, EarlyView.Ascidian Ciona larvae initially show strong clockwise tail twisting, which is largely corrected during development. However, a small residual twist remains. This study shows that organized helical myofibrils in tail muscles mechanically stabilize this residual asymmetry, preventing complete restoration of bilateral symmetry and revealing how embryos ...
Yuki S. Kogure +3 more
wiley +1 more source
The Stress Singularity in a Stepped Bar Under Impact Torsion
JSME international journal. Ser. 1, Solid mechanics, strength of materials, 1989 An impact torsion problem for a steppedbar composed of two semi-infinite bars bonded completely at each end is investigated. A stress singularity occurs at the corner of the bars. Therefore the stress analysis proceeds considering this stress singularity by making use of the series expansion technique, and the problems are reduced to an infinite set of
TSUJI, Tomoaki +3 more
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