Results 261 to 270 of about 382,243 (303)

Fatigue damage detection using cyclostationarity

Mechanical Systems and Signal Processing, 2015
Abstract In this paper, we present the second-order of cyclostationarity to detect and diagnose the fatigue damage of the stainless steel 316l subjected to low cycle fatigue (LCF). LCF is defined by repetitive cycling in a low stress and a short period.
D. Boungou, F. Guillet, M. El Badaoui, P. Lyonnet, T. Rosario   +4 more
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Detecting stress and fatigue cracks

IEEE Potentials, 1996
Discoveries in using open ended rectangular waveguides for microwave surface crack detection and sizing have generated interest. The foundation, potential, advantages and disadvantages of this methodology, developed at the Applied Microwave Nondestructive Testing Laboratory in the Electrical Engineering Department at Colorado State University, are ...
C. Huber, R. Zoughi
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Ultrasonic detection of fatigue damage

Engineering Fracture Mechanics, 1972
Abstract Results are reported of recent experiments which used change in ultrasonic attenuation measurements as a continuous monitor of fatigue damage during cyclic testing of polycrystalline aluminum and steel specimens. Ultrasonic pulses were generated by an x-cut quartz transducer firmly attached to the clamped end of a specimen rod using Eastman ...
Narayan R. Joshi, Robert E. Green
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A Fatigue Crack Detection Methodology

2015
This chapter presents a nonlinear modulation based fatigue crack detection methodology. It is estimated that up to 90 % of failures of in-service metallic structure are the result of fatigue cracks. The conventional techniques, which rely on the linear property modifications of ultrasonic waves, are reported to be not sensitive enough to detect the ...
Hoon Sohn, Hyung Jin Lim, Suyoung Yang
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Fuzzy based driver fatigue detection

2010 IEEE International Conference on Systems, Man and Cybernetics, 2010
International statistics shows that large numbers of road accidents are caused due to driver fatigue. In this paper the authors tried to detect the fatigue of a person who is working under some stressful conditions like Driving. The principle of the proposed system is based on the facial image analysis for warning the driver of fatigue to prevent ...
Mandalapu Sarada Devi, Preeti R Bajaj
openaire   +1 more source

Development of Fatigue Detecting Sensor

Key Engineering Materials, 2004
A fatigue detecting sensor that enables easy and precise estimation of fatigue damage of machines and structures was developed, based on the crack growth characteristics of metal. The sensor is composed of a metal foil with a single edge notch and a base metal foil. The two metal foils are bonded at the both far ends.
T. Kobayashi, O. Muragishi, K. Nihei
openaire   +1 more source

Detecting Voice Fatigue With Artificial Intelligence

Journal of Voice
Voice fatigue (VF) has many symptoms and can occur after extended or brief voice use, depending on the presence or absence of voice pathology, and other factors. However, fatigue is difficult to detect and quantify through current approaches. This study explores the use of artificial intelligence (AI) in the automatic detection and analysis of VF ...
Abhinav, Siripurapu, Robert T, Sataloff
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Electrochemical detection of fatigue damage

Metallurgical Transactions A, 1980
Electrochemical reoxidation currents are shown to provide a new method of detecting fatigue damage in metals. The basic principle is demonstrated by measurements on anodized samples of aluminum. The initial anodic oxide film is ruptured at the site of plastic deformation and the flow of charge is measured during subsequent reanodization, or healing of ...
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Driver Fatigue Detection: A Survey

2006 6th World Congress on Intelligent Control and Automation, 2006
Driver fatigue is an important factor in a large number of accidents. There has been much work done in driver fatigue detection. This paper presents a comprehensive survey of research on driver fatigue detection and provides structural categories for the methods which have been proposed.
null Qiong Wang, null Jingyu Yang, null Mingwu Ren, null Yujie Zheng   +3 more
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Fatigue - Life Establishment and Detection

SAE Technical Paper Series, 1968
<div class="htmlview paragraph">This paper discusses some of the factors which give rise to the need for continuing surveillance against fatigue in the field of aircraft maintenance. The subject is presented in relation to the limitations of statistically significant data on fatigue producing forces in some areas, and the problem of scatter in ...
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