Results 281 to 290 of about 7,243,608 (344)

A method to predict the fatigue life and the residual strength of composite materials subjected to variable amplitude (VA) loadings

Composite structures, 2019
A method to predict the fatigue life and residual strength of fiber reinforced composites subjected to variable amplitude (VA) loadings was developed.
A. D’Amore, L. Grassia
semanticscholar   +1 more source

Simultaneous multiple parameter optimization of variable-amplitude equal-thickness elastic screening of moist coal

Powder Technology, 2019
Screening is a key unit during coal cleaning. One of the most widely used screening technologies for steam coal preparation after removal of fine fractions, is a 6 mm screening method. We propose a novel variable-amplitude equal-thickness elastic screen (
Haishen Jiang, Weinan Wang, Zhiguo Zhou, Han Jun, Pengfei Wen, Yuemin Zhao, C. Duan, Lala Zhao, Zhen-fu Luo, Chusheng Liu   +9 more
semanticscholar   +1 more source

Crack path and life prediction under mixed mode cyclic variable amplitude loading through XFEM

International Journal of Fatigue, 2018
In the present paper, a mesh independent computational algorithm is developed and incorporated into a commercial finite element software (Abaqus) for automated fatigue crack growth analysis under mixed mode variable amplitude loading conditions.
Haydar Dirik, T. Yalçinkaya
semanticscholar   +1 more source

Life-span changes in EEG spectral amplitude, amplitude variability and mean frequency

Clinical Neurophysiology, 1999
The objectives were to assess life-span alterations in intrasubject variability of EEG spectral amplitudes and in amplitude and mean frequency computed from spectral amplitude profiles.EEG was recorded from the central and occipital scalp of 222 healthy males aged 4 to 90 years.
R E, Dustman, D E, Shearer, R Y, Emmerson   +2 more
openaire   +2 more sources

An experimental and analytical study on fatigue damage in concrete under variable amplitude loading

International Journal of Fatigue, 2018
A fatigue model for plain concrete under variable amplitude loading is proposed by unifying the concepts of damage mechanics and fracture mechanics through an energy equivalence, in conjunction with the principles of dimensional analysis and self ...
K. Keerthana, J. Kishen
semanticscholar   +1 more source

Fatigue Reliability: Variable Amplitude Loading

Journal of the Structural Division, 1982
Models which designers use to predict fatigue under variable amplitude and random loading are summarized. Basic terminology associated with random process theory is presented. Models for computing fatigue damage associated with various statistical distributrions of stress ranges are reviewed.
openaire   +1 more source

NDVI seasonal amplitude and its variability

International Journal of Remote Sensing, 2008
NDVI (Normalized Difference Vegetation Index) is a remotely sensed index of vegetation greenness.
Y. Julien, J. A. Sobrino
openaire   +1 more source

Multiaxial Fatigue Under Variable Amplitude Loads

Journal of Engineering Materials and Technology, 1999
Multiaxial fatigue under variable amplitude loading is investigated using Kandil et al.’s parameter, rainflow cycle counting on the shear strain history, and the Miner-Palmgren damage rule. Fatigue data are obtained on tubular specimens of S45C steel under proportional and nonproportional tension-torsion loading.
Kim, KS, Park, JC, Lee, JW
openaire   +2 more sources

An experimental investigation of the fatigue damage behaviour of adhesively bonded joints under the combined effect of variable amplitude stress and temperature variation

International Journal of Adhesion and Adhesives, 2018
Under working conditions, adhesively bonded structures are exposed to variable cyclic loading and temperature variation. However, there is still limited number of works dealing with their relationship.
B. Schneider, V. C. Beber, J. Schweer, M. Brede, B. Mayer   +4 more
semanticscholar   +1 more source

Relation of Alpha Frequency to Amplitude Variability

Perceptual and Motor Skills, 1968
Kleitman (4) has suggested that the frequency of the alpha EEG partern is related to level of consciousness. He presented studies which showed a decrease in alpha frequency during sensory isolation, an increase in alpha frequency in hyperthermia, a decrease in alpha frequency associated with hypothyroidism, and an association of alpha frequency and ...
openaire   +2 more sources