Variable Amplitude Loading
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Probability Analysis in Determining the Behaviour of Variable Amplitude Strain Signal Based on Extraction Segments
Abstract This paper focuses on analysis in determining the behaviour of variable amplitude strain signals based on extraction of segments. The constant Amplitude loading (CAL), that was used in the laboratory tests, was designed according to the variable amplitude loading (VAL) from Society of Automotive Engineers (SAE). The SAE strain signal was then edited
Lat. Am. j. solids struct.. Publicado em: 2017-12
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2. Crack propagation under variable amplitude loading
Experience shows that a damage induced by a given cycle is dependent on the loading history. In this regard, the objective of this paper is to study and describe the phenomenology of the loading history on crack propagation. Different loading configuration has been considered for fatigue crack propagation of XC38 steel; overload cycles followed by underload
Mat. Res.. Publicado em: 05/07/2013
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3. CONTROLE POR APRENDIZADO DE SISTEMAS SERVO: HIDRÁULICOS DE ALTA FREQÜÊNCIA / LEARNING CONTROL OF HIGH FREQUENCY SERVO: HYDRAULIC SYSTEMS
Hydraulic systems are used where relatively high forces and torques are required, or when high response speeds are necessary. They are used in industrial systems, robotics, movement simulators, automated plants, ore exploration, presses, and especially in fatigue testing systems. Fatigue tests are usually performed on servo-hydraulic systems, in order to pre
Publicado em: 2008
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4. Estudo da inferência de carregamento em histórias de vôos simulados na liga de Al aeronáutico SAE-AMS 7475 T7351 / Loading study of inference in a simulated flights history using an SAE-AMS 7475 T7351 aluminum alloy.
The loading inference and the fractographic reconstruction of fatigue crack propagation rate in simulated flight stories, as Twist, mini-Twist, Falstaff and mini-Falstaff were investigated in this work. The studied material was an aluminum alloy SAE-AMS 7475 T7351. Tensile and hardness tests were carried out in order to determine mechanical properties, as we
Publicado em: 2007
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5. Skyhook control of a hydropneumatic suspension system developed for use in agricultural farm wagons / Controle Skyhook aplicado a um modelo de suspensão hidropneumatica para carretas agricolas
This study deals with the development of a control system suited for a Hydropneumatic Suspension System designed for use in Agricultural Devices. Using the Skyhook Control methodology, two control systems are designed for a quarter car non-linear model, an active and a semi-active one. For performance measurement, two kinds of road excitation sources are con
Publicado em: 2006
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6. Modelagem Computacional da PropagaÃÃo de Trincas em Vigas de Pontes de AÃo sob Carregamento CÃclico de Amplitude VariÃvel / Computational Modeling of Crack Propagation in Beams Bridge Steel under Variable Amplitude Cyclic Loading
Pontes de aÃo normalmente estÃo sujeitas a carregamentos cÃclicos de amplitude variÃvel, com tipo e freqÃÃncia de trÃfego ao acaso. Dessa forma, a nucleaÃÃo e a propagaÃÃo de trincas nos elementos estruturais de uma ponte podem ser resultantes das flutuaÃÃes de carregamentos. ApÃs determinar a localizaÃÃo e o tamanho de uma falha existente, t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/09/2002
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7. Accounting for the shapes and size distributions of miniature endplate currents.
The current model does not account adequately for the characteristics of miniature endplate currents (MEPCs). We do not understand their relatively slow rise, the shape of their rise, their variable and sometimes prolonged decay, and the correlation between amplitude and decay time. If we assume that ACh is released from the vesicle through a pore and that t
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8. The effects of taurine on Ca2+ uptake by the sarcoplasmic reticulum and Ca2+ sensitivity of chemically skinned rat heart.
1. Caffeine (10 mM) induced a transient contracture in saponin-treated cardiac trabeculae as a result of Ca2+ release from the sarcoplasmic reticulum (SR). Regular cycles of uptake and release were repeated to stabilize responses. The SR accumulated Ca2+ during the period prior to the addition of caffeine and this was reflected in the size of the caffeine co