Results 21 to 30 of about 3,042,639 (351)

Stress detection from EEG using power ratio [PDF]

open access: yes2020 International Conference on Emerging Trends in Information Technology and Engineering (ic-ETITE), 2020
Stress correlates itself as a mental conscious and emotion within a person that influences mental ability and decision-making skills, which results in an inappropriate work. Studies have recently developed to detect the stress in a person while performing different tasks. One of the methods is through Electroencephalograph (EEG).
Taruv Harshita Priya   +3 more
openaire   +1 more source

Fatigue Crack Growth Behavior of Different Zones in an Overmatched Welded Joint Made with D32 Marine Structural Steel

open access: yesMetals, 2023
Applying fracture mechanics theory to heterogeneous welded joints might lead to an uncertain assessment of fatigue crack propagation behavior and, consequently, an inaccurate estimation of the cyclic loading capacity and fatigue life of welded structures.
Wei Song   +6 more
doaj   +1 more source

Very High Cycle Fatigue Behavior of TA11 Titanium Alloy

open access: yesJournal of Aeronautical Materials, 2017
The conventional fatigue test method was used to obtain the very high cycle fatigue (VHCF) limits of 3×107 and 1×108 cycles for TA11 titanium alloy in different temperatures and stress ratios.
JIAO Zehui   +4 more
doaj   +1 more source

Fatigue Crack Propagation Study of Bridge Steel Q345qD Based on XFEM Considering the Influence of the Stress Ratio

open access: yesApplied Sciences, 2022
In the past, fatigue cracks have appeared in the orthotropic steel decks of bridges shortly after they opened to traffic. Previous studies have shown that high tensile welding residual stress exists in welded joints of steel bridges, which significantly ...
Baoya Cao   +4 more
doaj   +1 more source

Research on mechanical behaviour and determination method for shear strength of colluvial deposit in large-scale direct shear tests

open access: yesMeitan kexue jishu, 2023
In order to master the mechanical strength characteristics of the colluvial deposit and the influence of water content on it,a typical loose colluvial deposit of landslide in southwest China was taken as a research object.
Qiangqiang JIANG   +3 more
doaj   +1 more source

Seismic hazard assessment using apparent stress ratio [PDF]

open access: yesProceedings of the International Seminar on Design Methods in Underground Mining, 2015
Seismically active operations require special considerations for design and mining practices in order to mitigate the risk associated with large and potentially damaging seismic events. When detailed knowledge of the local rock mass conditions and the historical seismic response is considered during mine design, costly rehabilitation and time delays ...
Laura Brown   +2 more
openaire   +1 more source

Effect of stress ratio on through thickness fatigue properties of unidirectional and quasi-isotropic thick CFRP laminates with toughened interlaminar layers

open access: yesNihon Kikai Gakkai ronbunshu, 2018
The effect of stress ratio on through thickness fatigue properties of thick carbon fiber reinforced plastic (CFRP) laminates with toughened interlaminar layers was evaluated.
Tomoki ARAI   +4 more
doaj   +1 more source

Prediction of Fatigue Cracks Using Gamma Function

open access: yesFatigue of Aircraft Structures, 2023
In the present study it has been endeavored to estimate the fatigue crack propagation in V-notch Charpy specimens of 2024 T351 Al-alloy. For this purpose, a new application of fatigue crack growth (FCG) is developed based on the “Gamma function ...
Moussouni Abdelfetah   +2 more
doaj   +1 more source

Research of rotating and ultrasonic cycling fatigue in high-cycle regimes

open access: yesJournal of Aeronautical Materials
The effects of stress ratio(R),loading condition,and MnS inclusion on the fatigue behavior of medium-carbon pearlitic high strength steel were investigated by the combination of rotating(frequency of 52.5 Hz,103-108)bending and ultrasonic (frequency of ...
LIU Lu, WANG Shengnan, MA Yifan
doaj   +1 more source

Fatigue Design of Steel Bridge Deck Asphalt Pavement Based on Nonlinear Damage Accumulation Theory

open access: yesApplied Sciences, 2021
Based on the nonlinear damage theory, this paper aims to explore the fatigue performance of steel bridge deck asphalt pavement under multistage fatigue load.
Xunqian Xu   +5 more
doaj   +1 more source

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