Results 11 to 20 of about 3,042,639 (351)

Prediction of Fatigue Limit of Spring Steel Considering Surface Defect Size and Stress Ratio

open access: yesMetals, 2021
Surface defects decrease the fatigue limit of metals. In this study, the effects of surface defects on the fatigue limit of high-strength spring steel specimens were investigated.
Takehiro Ishii, Koji Takahashi
doaj   +1 more source

Effect of Stress Ratio and Evaluation of Crack Sizes on Very-High-Cycle-Fatigue Crack Propagation Life Prediction of Carburized Cr-Ni Steel

open access: yesMetals, 2022
Carburized Cr-Ni steel is widely used in the manufacture of components in many fields due to excellent performance, of which the service life has been a concern.
Yupeng Guo   +4 more
doaj   +1 more source

Oxidative stress parameters in plasma of Huntington's disease patients, asymptomatic Huntington's disease gene carriers and healthy subjects : a cross-sectional study [PDF]

open access: yes, 2007
BACKGROUND : Animal data and postmortem studies suggest a role of oxidative stress in the Huntington's disease (HD), but in vivo human studies have been scarce.
Babić, Tomislav   +5 more
core   +1 more source

Triaxial Compression Performance Research of Steel Slag Concrete on the Unified Strength Theory

open access: yesApplied Sciences, 2020
To better explore the mechanical properties of steel slag concrete (SSC) under triaxial compression, true triaxial tests were performed on SSC with three replacement ratios (30%, 70%, 100%) by a servo-controlled setup (TAWZ-5000/3000).
Zhiheng Deng   +4 more
doaj   +1 more source

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

Consolidation Characteristics and Bearing Behavior of Sand Pile Composite Foundation in Caisson Heightening

open access: yesShanghai Jiaotong Daxue xuebao, 2021
To study the influence of consolidation on the bearing capacity of the composite foundation in the process of caisson heightening, the consolidation characteristics of the sand pile composite foundation in the process of caisson heightening are discussed
CHEN Peishuai, PAN Yazhou, LIANG Fayun, LI Dejie
doaj   +1 more source

On the Propagation of Slip Fronts at Frictional Interfaces [PDF]

open access: yes, 2012
The dynamic initiation of sliding at planar interfaces between deformable and rigid solids is studied with particular focus on the speed of the slip front.
C.H. Scholz   +25 more
core   +3 more sources

The Effect of Mean Load for S355J0 Steel with Increased Strength

open access: yesMetals, 2020
The paper presents an algorithm for calculating the fatigue life of S355J0 steel specimens subjected to cyclic bending, cyclic torsion, and a combination of bending and torsion using mean stress values.
Roland Pawliczek, Dariusz Rozumek
doaj   +1 more source

Fatigue and Corrosion Fatigue of 18Ni Maraging Steel [PDF]

open access: yesArchives of Metallurgy and Materials, 2020
This study focused on the fatigue and corrosion fatigue of maraging steel 18Ni (250). The 18Ni (250) samples were tested for axial fatigue in air and 3.5% NaCl solution.
Zhu Yongmei   +6 more
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

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