Results 41 to 50 of about 19,345 (302)
Research on gas drainage drilling parameters and nitrogen injection for fire prevention in goaf
Gong-kuang zidonghua, 2020 Drilling and drainage can affect movement of air flow in goaf, thus leading to changes in goaf flow field, and increasing air leakage in goaf. At the same time, there is a state of negative pressure around the borehole, and the air leakage and air flow ...
CUI Chuanfa
doaj +1 more source
Advanced Engineering Materials, EarlyView.This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal +2 more
wiley +1 more source
EnergiesGeothermal energy is a renewable energy source that is rich in reserves, widely distributed, stable and reliable. The development of geothermal energy needs to be carried out by drilling wells to exploit the underground thermal fluid, and air-lift ...
Hongyu Ye +5 more
doaj +1 more source
Phase Field Failure Modeling: Brittle‐Ductile Dual‐Phase Microstructures under Compressive Loading
Advanced Engineering Materials, EarlyView.The approach by Amor and the approach by Miehe and Zhang for asymmetric damage behavior in the phase field method for fracture are compared regarding their fitness for microcrack‐based failure modeling. The comparison is performed for the case of a dual‐phase microstructure with a brittle and a ductile constituent.
Jakob Huber, Jan Torgersen, Ewald Werner
wiley +1 more source
Time‐Dependent Oxidation and Scale Evolution of a Wrought Co/Ni‐Based Superalloy
Advanced Engineering Materials, EarlyView.This study shows how a new wrought Co/Ni‐based superalloy resists oxidation at 800 ∘$^\circ$C. The oxide scale changes from rough, fast‐growing spinel to a dense, protective chromia–alumina layer. Atom probe analysis reveals tiny refractory‐rich bubbles at the interface that mark the transition to long‐term, diffusion‐controlled protection ...
Cameron Crabb +6 more
wiley +1 more source
Development and application of power head for CBM vehicle mounted drilling rig [PDF]
E3S Web of ConferencesIn order to meet the construction needs of surface coalbed methane extraction holes, cable holes, and mine surface rescue holes, a multifunctional power head suitable for coalbed methane vehicle mounted drilling rigs has been developed.
Liu Qi
doaj +1 more source
Application of short-drilling rapid drainage technology on long-distance excavation face
Gong-kuang zidonghua, 2020 In view of problems of current gas control measures on long-distance excavation face of high gas coal roadway which have high cost and impact excavation speed due to high gas volume fraction in return air flow,it was proposed to apply short-drilling ...
XIANG Zhencai
doaj +1 more source
Advanced Engineering Materials, EarlyView.Do not let thermal drift and instrument artifacts deceive high‐temperature nanoindentation results. We compare classical Oliver–Pharr and automatic image recognition analyses across steels and a Ni alloy to quantify these effects. Accounting for artifacts reveals systematic softening with temperature, while Cr and Ni additions boost resistance ...
Velislava Yonkova +2 more
wiley +1 more source
Jurnal Fisika Flux, 2017 Measuring device that used for measuring temperature and humidity inside soil digitally has been realized. The measuring device tested on soil along building foundation with putting SHT11 sensor inside soil using biopory drilling machine.
Arif Hidayat +2 more
doaj +3 more sources
Advanced Engineering Materials, EarlyView.Aluminum and nitride coatings are used in industry because they are hard, resist wear, and protect against oxidation. Adding boron can improve friction behavior and other properties. This study tests coatings on surfaces with different finishes. Results show smoother surfaces perform better, while rough ones wear faster, although coatings can reduce ...
Adrián Claver +9 more
wiley +1 more source