The Experts below are selected from a list of 40728 Experts worldwide ranked by ideXlab platform
Marcelo A Soto - One of the best experts on this subject based on the ideXlab platform.
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distributed modular temperature strain sensor based on optical fiber embedded in laminated composites
Composites Part B-engineering, 2019Co-Authors: Marcelo A SotoAbstract:Abstract A Smart Structure based on carbon fiber reinforced polymer (CFRP) embedding optical fibers is proposed for distributed sensing in structural health monitoring. The proposed CFRP package provides mechanical protection to the optical fiber, enables temperature-strain discrimination, and also facilitates the sensor's installation to secure reliable measurements. Experimental results verify a linear strain sensor response with temperature compensation, agreeing well with the response of strain gauges and the expected theoretical behavior. The Smart Structure can be used by gluing it on the surface of the monitored Structure or by embedding it as one of the layers used during manufacturing big composite Structures.
Laurent Gallimard - One of the best experts on this subject based on the ideXlab platform.
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active vibration control of a Smart functionally graded piezoelectric material plate using an adaptive fuzzy controller strategy
Journal of Intelligent Material Systems and Structures, 2019Co-Authors: Jonas Maruani, Isabelle Bruant, Frederic Pablo, Laurent GallimardAbstract:In this article, the active vibration control of a Smart Structure made out of a single functionally graded piezoelectric material layer, equipped with a network of discrete electrodes, is studied....
J. A. M??nson - One of the best experts on this subject based on the ideXlab platform.
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Smart composites with embedded shape memory alloy actuators and fibre Bragg grating sensors: Activation and control
Smart Materials and Structures, 2005Co-Authors: J. A. Balta, G. Dunkel, John Botsis, Federico Bosia, Véronique Michaud, J. A. M??nsonAbstract:This paper describes the production of an adaptive composite by embedding thin pre-strained shape memory alloy actuators into a Kevlar-epoxy host material. In order to combine the activation and sensing capabilities, fibre Bragg grating sensors are also embedded into the specimens, and the strain measured in situ during activation. The effect of manufacturing conditions, and hence of the initial stress state in the composite before activation, on the magnitude of the measured strains is discussed. The results of stress and strain simulations are compared with experimental data, and guidelines are provided for the optimization of the composite. Finally, a pilot experiment is carried out to provide an example of how a strain-stabilizing feedback mechanism can be implemented in the Smart Structure. © 2005 IOP Publishing Ltd.
Zikun Wang - One of the best experts on this subject based on the ideXlab platform.
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propagation of love waves in a Smart functionally graded piezoelectric composite Structure
Smart Materials and Structures, 2007Co-Authors: Jing Liu, Xiaoshan Cao, Zikun WangAbstract:In this paper, the propagation behavior of Love waves in a Smart functionally graded piezoelectric Structure is analyzed. The Smart Structure consists of three layers, in which the piezoelectric plate serves as the upper layer accompanied by a sandwiched graded layer and a metal substrate. In the graded layer, all the parameters and the elastic modulus are respectively assumed to vary after two mathematical forms, i.e. an exponential function and a linear function. The WKB method is adopted to analytically solve the propagation problem of Love waves for both electrical open and short cases on the free surface, respectively. The phase velocity curves demonstrate that the number of modes is greater than in the non-graded layer Structure. Furthermore, the influence of graded variation on coupled electromechanical factor is presented.
L Q Yao - One of the best experts on this subject based on the ideXlab platform.
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a hybrid stress ans solid shell element and its generalization for Smart Structure modelling part i solid shell element formulation
International Journal for Numerical Methods in Engineering, 2000Co-Authors: K Y Sze, L Q YaoAbstract:In the recent years, solid-shell finite element models which possess no rotational degrees of freedom and applicable to thin plate/shell analyses have attracted considerable attention. Development of these elements are not straightforward. Shear, membrane, trapezoidal, thickness and dilatational lockings must been visioned. In this part of this paper, a novel eight-node solid-shell element is proposed. To resolve the shear and trapezoidal lockings, the assumed natural strain (ANS) method is resorted to. The hybrid-stress formulation is employed to rectify the thickness and dilatational locking. The element is computationally more efficient than the conventional hybrid elements by adopting orthogonal-assumed stress modes and enforcing admissible sparsity in the flexibility matrix. Popular benchmark tests are exercised to illustrate the efficacy of the elements. In Part II of the paper, the element will be generalized for Smart Structure modelling by including the piezoelectric effect. Copyright © 2000 John Wiley & Sons, Ltd.
