Results 11 to 20 of about 101,481 (337)

Impact of Wood Moisture Content on Structural Integrity of Wood Under Dynamic Loads

open access: yesDrvna Industrija, 2023
The majority of mechanical wood properties are negatively affected by wood moisture within the hygroscopic range, disregarding the stress relaxation of wood at very low moisture contents (MC).
Lukas Emmerich, Christian Brischke
doaj   +1 more source

Nature of the Brittleness of Metals

open access: yesУспехи физики металлов, 2022
The brittleness of material is considered as a specific manifestation of mechanical behaviour under load, which appears in the instability of the strength characteristic value under conditions of non-uniformity of the stress–strain state (SSS).
Yu. Ya. Meshkov, G. P. Zimina, and N. M. Stetsenko
doaj   +1 more source

Problems of Multiscale Brittleness Estimation for Hydrocarbon Reservoir Exploration and Development

open access: yesApplied Sciences, 2022
The study is focused on the problem of using geophysical data to estimate brittleness of rock masses for the needs of petroleum industry. Three main developed ways to estimate brittleness—mineral-based, log-based, and elastic-based brittleness indices ...
Nikita Dubinya   +2 more
doaj   +1 more source

Application of Soft Computing Techniques to Estimate Cutter Life Index Using Mechanical Properties of Rocks

open access: yesApplied Sciences, 2022
The wear of cutting tools is critical for any engineering applications dealing with mechanical rock excavations, as it directly affects the cost and time of project completion as well as the utilization rate of excavators in various rock masses.
Timur Massalov   +2 more
doaj   +1 more source

Multidisciplinary Characterization of Unconventional Reservoirs Based on Correlation of Well and Seismic Data

open access: yesEnergies, 2020
Combinatorial analysis of key petrophysical parameters can provide valuable information about subsurface hydrocarbon reservoirs. This is particularly important for reservoirs with unconventional rock formations that, due to the low permeability, need to ...
Weronika Kaczmarczyk   +1 more
doaj   +1 more source

Time-Frequency Response of Acoustic Emission and Its Multi-Fractal Analysis for Rocks with Different Brittleness under Uniaxial Compression

open access: yesMathematics, 2023
The occurrence of rock burst hazards is closely related to the brittleness of rocks. Current research has paid less attention to the in-depth relationship between rock brittleness and acoustic emission (AE) signal characteristics and precursor ...
Jianchun Ou, Enyuan Wang, Xinyu Wang
doaj   +1 more source

Numerical Modeling of a Punch Penetration Test Using the Discrete Element Method

open access: yesSlovak Journal of Civil Engineering, 2020
Understanding the brittleness of rock has a crucial importance in rock engineering applications such as the mechanical excavation of rock. In this study, numerical modeling of a punch penetration test is performed using the Discrete Element Method (DEM).
Basirat Rouhollah, Hamidi Jafar Khademi
doaj   +1 more source

Mechanical properties and brittleness of concrete made by combined fly ash, silica fume and nanosilica with ordinary Portland cement

open access: yesAIMS Materials Science, 2023
This paper introduced a new concrete composites made by quaternary binder by partially replacing ordinary Portland cement (OPC) with different percentages of supplementary cementitious materials (SCMs).
Grzegorz Ludwik Golewski
doaj   +1 more source

Rockburst hazard potential assessment of rocks of the Khibiny massif deposits according to the Kaiser criterion

open access: yesVestnik MGTU, 2023
The mining and geological conditions in the mines worsen due to changes in the stress-strain state of rock masses and their structural disturbance when mining goes to great depths.
Kuznetcov N. N., Kondrashov L. Yu.
doaj   +1 more source

DENTAL CERAMICS - MECHANICAL PROPERTIES

open access: yesČeská Stomatologie a Praktické Zubní Lékařství, 2022
Introduction, aim: Ceramic is a mixture of inorganic non-metallic materials. The history of the ceramic is dated since Paleolithic age. It is used, for example for production of jewelry, dishes, the construction industry, sculpturing and of course in ...
K Hynková, I Voborná
doaj   +1 more source

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