Results 21 to 30 of about 168,341 (157)
Evaluation of the performance of coated and uncoated carbide tools in drilling thick CFRP/aluminium alloy stacks [PDF]
, 2013 This paper aims to establish the wear mechanisms of coated and uncoated tungsten carbide drills when drilling carbon fibre reinforced plastics (CFRP)/aluminium alloy (Al) stacks. During the drilling experiments, thrust forces were measured.
MONTOYA, Maxime +3 more
core +1 more source
High Efficiency Drilling Methods for Through Beds Hole in Underground Coal Mine
Meikuang Anquan, 2020 Considering the drilling efficiency problem encountered by crossing holes in underground coal mine, the paper divided roof and floor rock stratum into three grades in order to facilitate the study of technology in underground coal mine: high hard rock (4≤
DOU Xuqian
doaj +1 more source
Prediction Model of Drilling Performance for Percussive Rock Drilling Tool
Advances in Civil Engineering, 2020 This study suggests a method for quantitatively estimating the drilling performance of the down-the-hole (DTH) hammer during percussive drilling of rock surfaces. A pneumatic dynamic model of the DTH hammer was developed that considers the mass flow rate
Dae-Ji Kim +6 more
doaj +1 more source
Measurement of laser absorptivity for operating parameters characteristic of laser drilling regime [PDF]
, 2008 Publisher version : http://iopscience.iop.org/0022-3727/41/15/155502/Laser drilling in the percussion regime is commonly used in the aircraft industry to drill sub-millimetre holes in metallic targets.
SCHNEIDER, Matthieu +3 more
core +1 more source
Optimal Design Parameters of a Percussive Drilling System for Efficiency Improvement
Advances in Materials Science and Engineering, 2018 This paper aims to determine the optimal design parameters for percussive drilling systems considering the bit-rock interaction. First, the motion dynamics of a bit impacted by a dropped piston are modeled by impact stress propagation and a rock-breaking
Changheon Song +3 more
doaj +1 more source
Damage Evolution Under Cyclic Dynamic Loading in Rocks During Drilling [PDF]
E3S Web of ConferencesThe damage evolution in rocks under cyclic dynamic loading is critical for optimizing percussive drilling operations in mining, oil and gas, and geothermal applications.
Pashchenko Oleksandr +5 more
doaj +1 more source
Rotary ultrasonic machining of rocks: An experimental investigation
Advances in Mechanical Engineering, 2018 Rock drilling is widely used to explore and mine energy resources. It has also been used to extract samples to study the earth’s geological composition and topography and to explore different planets.
PKSC Fernando, Meng Zhang, Zhijian Pei
doaj +1 more source
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
Borophene‐based sensing platforms: Pioneering ultrasensitive detection
FlexMat, EarlyView.Schematic Diagram of Performance Optimization Strategies and Sensing Application Characteristics of Two‐Dimensional Boron‐Based Materials in Novel Sensors. Abstract Borophene is an emerging two‐dimensional (2D) material. Since significant breakthroughs were achieved in the experimental synthesis of borophene, the exploration and development of ...
Chi Yuan, Yanpeng Ji, Yi Liu, Guoan Tai
wiley +1 more source
Journal of Dental Education, EarlyView.ABSTRACT Purpose/Objectives Immersive educational technologies, including applications of artificial intelligence in education (AIED), are increasingly used to develop clinical skills in health professions education. This study evaluated the feasibility and perceived value of integrating an artificial intelligence (AI)‐enabled virtual patient platform ...
Jeffrey J. Borckardt +6 more
wiley +1 more source