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I. Chudinovich¹, C. Constanda¹
The International Conference on Computational & Experimental Engineering and Sciences, Vol.5, No.3, pp. 137-144, 2008, DOI:10.3970/icces.2008.005.137
Abstract An initial-boundary value problem for bending of a piecewise homogeneous thermoelastic plate with transverse shear deformation [1] is considered. The unique solvability in distributional spaces is proved by means of a combination of the Laplace transformation and variational methods. This is the first, and essential, step in the construction of boundary element methods for numerical approximations of the solution. The model without thermal effects has been studied in [2]--[6]. More >

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663

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FU Zhiliang¹, GUO Hua², GAO Yanfa³
The International Conference on Computational & Experimental Engineering and Sciences, Vol.5, No.3, pp. 145-156, 2008, DOI:10.3970/icces.2008.005.145
Abstract This paper is focused on the micro-damage evolution properties of gray green mudstone under impacting disturbance load conditions for the first time by using the real time CT testing technique. CT images and CT values for rock cross-sections under different impacting disturbance loading levels were obtained. The paper is also to describe process of rock creep damage under disturbance loads and to explore the mechanism of micro-damage. The results have shown that rock failure is easy to happen suddenly rock is in or close to limit strength neighborhood during the process of disturbance. This will further lay the theory basis… More >

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1156

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787

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Alireza Fereidooni¹, Kamran Behdinan¹, Zouheir Fawaz¹
The International Conference on Computational & Experimental Engineering and Sciences, Vol.5, No.3, pp. 157-162, 2008, DOI:10.3970/icces.2008.005.157
Abstract In this paper, dynamics instability of laminated composite beams subjected to axial and harmonically varying time loads are studied. The equations of motion are derived in integral form using the principle of virtual work and the first order shear deformation theory. A five node twenty-two degrees of freedom beam element has been developed to discretize these equations. The regions of dynamic instability of the beam are determined by solving the obtained Mathieu form differential equations. The effects of non-conservative loads and shear stiffness parameters on dynamic instability of the beam are studied. More >

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948

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803

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L.C.G. DeSouza¹
The International Conference on Computational & Experimental Engineering and Sciences, Vol.5, No.3, pp. 163-172, 2008, DOI:10.3970/icces.2008.005.163
Abstract Satellite Attitude Control System usually does not have all the states available for feedback; therefore, full state estimation by any sort of filtering methodology becomes essential. A good estimation algorithm must filter out the undesirable noise from the measurement signal. Kalman Filter (KF) technique is a traditional procedure to estimate the states of a linear system that are not always measured directly by the sensors, minimizing the variance of the estimated error. However, the KF is not fully robustness proven in face of unpredictable noise sources and it is not always able to minimize the error under severe conditions. In… More >

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1167

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802

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A.A.Bayramov¹, N.A.Safarov²
The International Conference on Computational & Experimental Engineering and Sciences, Vol.5, No.3, pp. 173-178, 2008, DOI:10.3970/icces.2008.005.173
Abstract In paper the automatic photoelectric device (APD) for most optimum illumination of streets and objects is described. The offered photovoltaic system is mean for automatic switching on and switching off to an electric circuit of electric systems and illuminating lamps. This system differs from existing ones that the silicon solar cell is used for the purpose increase of input sensitivity and an output power, and so the circuit of our system is simpler. One of main technical advantages is that the relay for a current of 10A is used on an output of the automatic control system. This advantage allows… More >

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1314

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779

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K. G. Wang¹
The International Conference on Computational & Experimental Engineering and Sciences, Vol.5, No.3, pp. 179-186, 2008, DOI:10.3970/icces.2008.005.179
Abstract Microstructural modeling is very important because it can provide a critical link between properties, mesoscopic length scale, and atomistic scale (multiscale modeling). There exist a couple of models and simulations to study microstructural evolution. It will be important and useful to discover unified model equations hidden in microstructure evolution. In this paper, I will derive the unified model equations for microstructure evolution. The governing equations in Lifshitz-Slyozov-Wagner theory and diffusion screening theory that modeled microstructural evolution are derived with some approximations from the unified model equations. The governing equations in multiparticle diffusion simulation and phase-field simulation in microstructure evolution are… More >

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962

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706

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G.M. Kulikov¹, E. Carrera², S.V. Plotnikova¹, S. Brischetto²
The International Conference on Computational & Experimental Engineering and Sciences, Vol.5, No.3, pp. 187-192, 2008, DOI:10.3970/icces.2008.005.187
Abstract This paper presents the geometrically exact assumed stress-strain four-node element with nine displacement degrees of freedom per node. The finite element formulation developed is based on the 9-parameter shell model by employing a new concept of interpolation surfaces (I-surfaces) inside the shell body. We introduce three I-surfaces and choose nine displacements of these surfaces as fundamental shell unknowns. Such choice allows us to represent the higher-order shell formulation in a very compact form and to derive in curvilinear reference surface coordinates the strain-displacement relationships, which are objective, i.e. invariant under all rigid-body motions. More >

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743