Results 41 to 50 of about 59,467 (314)

Effect of mental fatigue on induced tremor in human knee extensors [PDF]

, 2014
In this study, the effects of mental fatigue on mechanically induced tremor at both a low (3-6Hz) and high (8-12Hz) frequency were investigated. The two distinct tremor frequencies were evoked using two springs of different stiffness, during 20s ...
Budini, Francesco, Durbaba R., de Vito, Giuseppe, Lowery M., De Vito G., Lowery, Madeleine, Durbaba, Rade, Budini F.   +7 more
core   +1 more source

Fatigue Properties of Plain Concrete under Triaxial Tension-Compression-Compression Cyclic Loading

Shock and Vibration, 2017
Fatigue tests were performed on plain concrete under triaxial tension-compression-compression (T-C-C) cyclic loading with constant and variable amplitude using a large multiaxial machine.
Dongfu Zhao, Haijing Gao, Huixuan Liu, Penghe Jia, Jianhui Yang   +4 more
doaj   +1 more source

Creep-fatigue life assessment of cruciform weldments using the linear matching method [PDF]

, 2013
This paper presents a creep-fatigue life assessment of a cruciform weldment made of the steel AISI type 316N(L) and subjected to reversed bending and cyclic dwells at 550C using the Linear Matching Method (LMM) and considering different weld zones.
Chen, Haofeng, Gorash, Yevgen
core   +1 more source

Evaluation of equivalent axle load factors for multi axles based on fatigue tests using actual strain waveforms

International Journal of Transportation Science and Technology
Equivalent axle load factor (EALF) is used to characterize the fatigue damage effect of multi-axle loads on asphalt pavement. EALF is calculated as the ratio of the pavement’s fatigue resistance under a single axle load to that under a multi-axle load ...
Huailei Cheng, Lijun Sun, Yue Hu, Zhang Chen, Xiaoying Tong   +4 more
doaj   +1 more source

Short-term fatigue analysis for tower base of a spar-type wind turbine under stochastic wind-wave loads

International Journal of Naval Architecture and Ocean Engineering, 2018
Due to integrated stochastic wind and wave loads, the supporting platform of a Floating Offshore Wind Turbine (FOWT) has to bear six Degrees of Freedom (DOF) motion, which makes the random cyclic loads acting on the structural components, for instance ...
Haoran Li, Zhiqiang Hu, Jin Wang, Xiangyin Meng   +3 more
doaj   +1 more source

A mechanistic approach to the Kitagawa-Takahashi diagram using a multiaxial probabilistic framework [PDF]

, 2013
The aim of this paper is to propose a flexible multiaxial modelling framework that is capable of combining two fatigue damage mechanisms so as to continuously describe the Kitagawa-Takahashi diagram.
PESSARD, Etienne, MOREL, Franck, BELLETT, Daniel, KOUTIRI, Imade   +3 more
core   +1 more source

Application of Multi-Objective Control in Power and Load Optimization of Wind Turbines

IEEE Access
During operation, wind turbine systems are affected by external wind speed disturbances and the dynamic coupling of the system, which can lead to significant resonance phenomena within certain frequency ranges. Resonance causes a dramatic increase in the
Jiawang Yuan, Shan He, Jing Cheng, Weiqing Wang   +3 more
doaj   +1 more source

Investigation of Site-Specific Wind Field Parameters and Their Effect on Loads of Offshore Wind Turbines

Energies, 2012
The main contributing factors to unsteady loading of Offshore Wind Turbines (OWT) are wind shear, turbulence, and waves. In the present paper, the turbulence intensity and the wind shear exponent are investigated.
Jörg R. Seume, Benedikt Ernst
doaj   +1 more source

Fatigue Performance of SFPSC under Hot-Wet Environments and Cyclic Bending Loads

Advances in Materials Science and Engineering, 2018
A new structural material named “steel fiber polymer structural concrete (SFPSC)” with features of both high strength and high toughness was developed by this research group and applied to the bridge superstructures in the hot-wet environments.
Shanshan Luo, Peiyan Huang, Xinyan Guo, Xiaohong Zheng   +3 more
doaj   +1 more source

A New Miniature Wind Turbine for Wind Tunnel Experiments. Part II: Wake Structure and Flow Dynamics

Energies, 2017
An optimized three-bladed horizontal-axis miniature wind turbine, called WiRE-01, with the rotor diameter of 15 cm is designed and fully characterized in Part I of this study.
Majid Bastankhah, Fernando Porté-Agel
doaj   +1 more source