Results 21 to 30 of about 22,881 (247)

Hydrous Pyrolysis of Source Rocks with Different Maturity in Dongying Sag, Bohai Bay Basin, China: Implications for Shale Oil Exploration and Development

open access: yesEnergies, 2023
Shale oil yield, movability, and reservoir brittleness are three factors that must be focused on for shale oil exploration and development. The yield and composition of hydrocarbons and mineral composition have changed significantly during diagenesis ...
Jingong Cai   +5 more
doaj   +1 more source

Effect of Coarse Aggregate Grading on Mechanical Parameters and Fracture Toughness of Limestone Concrete

open access: yesInfrastructures, 2023
This work presents a discussion of the basic properties of broken mineral limestone aggregates with the specification of the properties affecting the fracture toughness of concretes made with these aggregates. To determine the influence of the grain-size
Grzegorz Ludwik Golewski
doaj   +1 more source

Coarse Grained Heat-Affected Zone Microstructure and Brittleness of Ti-Nb-B Microalloyed High Toughness and Wear Resistant Steel

open access: yesMetals, 2019
The effects of B, Ti-Nb, and Ti-Nb-B microalloying on the microstructure and properties of the coarse grain heat affected zone (CGHAZ) of C-Mn-Si-Mo wear-resistant steel have been investigated by means of thermal simulation, mechanical property test ...
Defa Li   +4 more
doaj   +1 more source

Examining of rock drilling properties in underground metal mine excavation [PDF]

open access: yesAnais da Academia Brasileira de Ciências, 2021
In underground metal mines, drilling and blasting is widely used production method. Drilling holes is especially a time consuming operation. The aim of this study is to examine and analyze drilling operation and its duration in underground ore and dead ...
MUSTAFA EMRE YETKİN
doaj   +1 more source

Analysis influence of Dmax on fracture mechanics parameters of concrete made of limestone aggregate at three point bending.

open access: yesBudownictwo i Architektura, 2007
The analysis of concrete behaviour taking into account fracture mechanics method makes it possible to describe the origin and development of the damages occurring in it, which is impossible in case of using global strength characteristics of composite ...
Grzegorz Golewski
doaj   +1 more source

Theoretical Investigations of a BN Polymorph with sp2 + sp3 Hybridizations

open access: yesCrystals, 2021
The crystal structure, mechanical anisotropy, elastic properties and electronic characteristics, as well as the stability, of P4/m BN are predicted by means of density functional theory.
Xinhai Yu   +3 more
doaj   +1 more source

Structural Mechanism of Performance Loss of Copper Coolers of Glass Production with Thermal Diffusion Protective Layer

open access: yesМеханика машин, механизмов и материалов, 2023
A general assessment of options for increasing the resistance of elements of heat-removing devices made of copper is carried out. The peculiarity of high-temperature corrosion destruction of thermal diffusion aluminum- containing protective layer on M1 ...
Valery M. Konstantinov   +3 more
doaj   +1 more source

Brittle source identification method for ship power grid based on complex network

open access: yesZhongguo Jianchuan Yanjiu
ObjectiveExisting brittle source identification methods have such problems as their single-perspective approach, disregard for the local and global characteristics of nodes, and insufficient consideration of the loads carried by nodes.MethodsThe method ...
Xiao TIAN, Zhiquan LIU
doaj   +1 more source

Brittle or Quasi-Brittle Fracture of Engineering Materials 2016 [PDF]

open access: yesAdvances in Materials Science and Engineering, 2016
1Department of Engineering Design and Materials, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway 2Faculty of Mechanical Engineering, Politehnica University of Timisoara, Blvd. M. Viteazu, Nr. 1, 300222 Timisoara, Romania 3Fatigue and Fracture Research Laboratory, Center of Excellence in Experimental Solid Mechanics and ...
Filippo Berto   +4 more
openaire   +4 more sources

Increased Mechanical Properties of Carbon Nanofiber Mats for Possible Medical Applications

open access: yesFibers, 2019
Carbon fibers belong to the materials of high interest in medical application due to their good mechanical properties and because they are chemically inert at room temperature.
Marah Trabelsi   +6 more
doaj   +1 more source

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