Results 41 to 50 of about 2,570 (205)
Shiyou jixie, 2020 High-speed rotary percussive drilling technology is a new type of high-efficiency rock breaking technology based on PDM drilling and self-oscillating rotary percussive drilling.
Yu Yang, Liu Shiyin
doaj
Rock Breaking Analysis and Process Parameter Optimization of Pneumatic DTH Hammer Bit
Shiyou jixie, 2022 In order to improve the rock-breaking efficiency and penetration ability of pneumatic DTH hammer in hard strata, based on the theory of nonlinear contact dynamics, the ABAQUS software was used to build a piston-pneumatic DTH hammer bit-rock(granite ...
Wang Shenglin +5 more
doaj
Application of damage mechanics in percussive drilling modelling [PDF]
, 2005 A stationary-periodic quasi-static model of rock percussive deep drilling is introduced. First, an auxiliary problem of stationary indentation of a rigid indentor is considered.
Mikhailov, SE, Namestnikova, IV
core
X‐ray computed tomography study of terrestrial analog cores in preparation for Mars sample return
Meteoritics &Planetary Science, EarlyView.Abstract Mars Sample Return (MSR) is expected to transform planetary science by providing unprecedented access to pristine Martian material. Initial characterization in the sample receiving facility (SRF) will rely on nondestructive techniques such as X‐ray computed tomography (XCT) to document the condition, distribution, and internal features of ...
Sophie Benaroya +3 more
wiley +1 more source
Periodontology 2000, EarlyView.Abstract The aim of this comprehensive review was to evaluate comparative studies on horizontal and fixed‐angle centrifugation methods for preparing platelet‐rich fibrin (PRF). Furthermore, additional studies utilizing horizontal PRF (H‐PRF) were systematically investigated.
Nima Farshidfar +6 more
wiley +1 more source
Nonlinear Dynamics of a Resonant-Impact Dielectric Elastomer Actuator
Applied System Innovation, 2022 In recent years, with the rapid development of soft robots, dielectric elastomer actuators (DEAs) as a novel type of soft actuators have been widely studied. However, DEAs often suffer from low instantaneous output force/power, especially in high payload
Chuang Wu +3 more
doaj +1 more source
Quasi-static stationary-periodic model of percussive deep drilling [PDF]
, 2005 Copyright @ 2005 Patron EditoreIn the percussively deep drilling, the rock is modeled by an infinite elastic medium with a semi-infinite cylindrical bore-hole having a curvilinear bottom.
Mikhailov, SE, Namestnikova, IV
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Improvement of hole drilling technology for ore drawing intensification [PDF]
, 2018 Purpose. The improvement of hole drilling for increasing the mineral recovery ratio by ore drawing improvement through blasting. Methods. The drilling parameters were examined for rock dumps.
Gaponenko, I +3 more
core +1 more source
Fossil Hegemony and Capitalist Realism in Tropic of Orange
Future Humanities, Volume 4, Issue 1, May 2026.ABSTRACT This article examines Karen Tei Yamashita's Tropic of Orange (1997) through the lens of Mark Fisher's influential concept ‘capitalist realism’. Scholars of petrofiction have pointed to a political ambivalence in the representation of fossil fuels, where a better understanding of fossil capital can overwhelm as much as galvanize.
Claire Ravenscroft
wiley +1 more source
Development of a switchable system for longitudinal and longitudinal-torsional vibration extraction [PDF]
, 2012 High-frequency/low-frequency drilling is an attractive technology for planetary exploration tools, and one which has seen considerable innovation in the techniques used to ensure rotation of the front-end cutting bit.
Harkness, Patrick, Lucas, Margaret
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