Results 21 to 30 of about 3,073,145 (301)

Predicting fatigue crack growth rate in a welded butt joint: The role of effective R ratio in accounting for residual stress effect [PDF]

open access: yes, 2009
A simple and efficient method is presented in this paper for predicting fatigue crack growth rate in welded butt joints. Three well-known empirical crack growth laws are employed using the material constants that were obtained from the base material ...
Servetti, Guido, Zhang, X.
core   +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

Stress-deformation characteristics of silty soil based on K0 consolidation and drainage unloading stress path tests

open access: yesYantu gongcheng xuebao, 2017
Based on different initial stress states and unloading stress ratios, the unloading stress path drainage tests under K0 consolidation are carried out on the silty clay sampled from the construction site of the South-to-North Water Diversion Project.
ZHANG Kun-yong 1, 2, LI Guang-shan 1, 2, MEI Xiao-hong 3, DU Wei 1, 2
doaj   +1 more source

The male to female ratio at birth [PDF]

open access: yes, 2014
The factors that influence the male to female ratio at birth are legion. Males are usually born in excess and stress decreases the ratio while wellbeing and good health tends to increase it.
Grech, Victor E., Mamo, Julian
core   +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

Kynurenine to tryptophan ratio as a biomarker of acute stress in fish [PDF]

open access: yesChemosphere, 2022
The aim of this study was to determine the kynurenine (KYN) to tryptophan (TRP) ratio (KTR) in fish tissue to assess its usefulness as a biomarker of acute stress. Laboratory held rainbow trout (Oncorhynchus mykiss) were subjected to an acute stressor and KYN, TRP and cortisol were measured in liver and brain tissues at 4- and 48-h post-stress.
Jade Wish   +9 more
openaire   +2 more sources

Melatonin attenuates oxidative stress and modulates inflammatory response after experimental burn trauma [PDF]

open access: yes, 2018
Introduction. Thermal injury activates an inflammatory response. Melatonin possesses anti-oxidant and anti-inflammatory properties. The objective of the present work was to study melatonin effects on the inflammatory response under ...
Atanasova, Milena   +3 more
core   +3 more sources

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

Numerical Simulation on Change of Equivalent Permeability of Coal Rock Under Different Stress Ratios

open access: yesMeikuang Anquan, 2020
We describe the mechanics characteristic of the coal rock by adopting B-B failure criteria. Moreover, we study the crack evolution rule of coal rock, the internal flow distribution of coal rock and the equivalent permeability of coal rock under ...
LI Huigui, GAO Baobin, WANG Honglei, LI Huamin
doaj   +1 more source

Stress-Minimizing Orthogonal Layout of Data Flow Diagrams with Ports [PDF]

open access: yes, 2014
We present a fundamentally different approach to orthogonal layout of data flow diagrams with ports. This is based on extending constrained stress majorization to cater for ports and flow layout.
C.D. Schulze   +15 more
core   +1 more source

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