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Sutthinane Nilbuaklee¹, Chanyut Kolitawong¹, Banpot Horbanluekit^1,2
The International Conference on Computational & Experimental Engineering and Sciences, Vol.13, No.1, pp. 4-10, 2009, DOI:10.3970/icces.2009.013.004
Abstract The purpose of this research is to determine fracture effects of vulcanize elastomer at various thickness to width ratios under opening mode fracture mechanics. The J-integral values from finite element method are compared with those from experiment. In this research, fracture tests perform under Single Edge Notch Tensile (S.E.N.T) tests using the multiple-specimen method. Compare to the experimental data, the numerical results are acceptable at the deep crack length, i.e. high crack length to width ratio. The k values from the 3-D numerical calculation show that thin sheet is dominated by plane stress state, but thick sheet is dominated by… More >

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N. J. Lee, C.R. Welch¹
The International Conference on Computational & Experimental Engineering and Sciences, Vol.13, No.1, pp. 11-12, 2009, DOI:10.3970/icces.2009.013.011
Abstract Carbon nanotubes have significant potential as the basis for super infrastructure material. The shear modulus of carbon nanotube ensembles is relatively low, comparable to graphite, as the carbon nanotubes interact via weak van der Waals forces. Unmodified, their intermolecular interactions are insufficient to take full advantage of the extraordinarily high strengths predicted for carbon nanotube-based fibers. Thus, a key to their use in high-strength materials is developing strong bonds between these molecules. In this study, we examine the potential development of covalent bonds between carbon nanotube pairs cross-bonded by proton bombardment using molecular dynamics simulation. Covalent bond formation between aligned… More >

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595

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AnteBilić¹
The International Conference on Computational & Experimental Engineering and Sciences, Vol.13, No.1, pp. 13-14, 2009, DOI:10.3970/icces.2009.013.013
Abstract Using several popular first-principles packages for materials modeling the nature of the cubic lattice of barium zirconate has been investigated. The evaluated vibrational spectra typically exhibit an extended and prominent dynamical instability. The instability manifests through imaginary frequency optical modes along the whole R-M edge of the Brillouin zone. The experimentally observed simple cubic structure is found to be dynamically unstable against an antiferro-distortive transformation. The computations predict an orthorhombic crystal structure of the material, only slightly distorted from the cubic lattice, with an eight times larger unit cell and alternate ZrO₆ octahedra slightly rotated in opposite directions around the… More >

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560

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Darrell W. Pepper¹, Xiuling Wang²
The International Conference on Computational & Experimental Engineering and Sciences, Vol.13, No.1, pp. 15-22, 2009, DOI:10.3970/icces.2009.013.015
Abstract A meshless method for simulating indoor contaminant dispersion within buildings and rooms has been developed. The approach utilizes the advantages of the meshless method by distributing collocation points and different order radial basis functions according to the computational domain and evolving numerical solution. The numerical scheme yields fast convergence and high accuracy necessary for providing quick assessments of contamination transport within enclosures. More >

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597

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A.A.Bayramov¹
The International Conference on Computational & Experimental Engineering and Sciences, Vol.13, No.1, pp. 23-28, 2009, DOI:10.3970/icces.2009.013.023
Abstract In this paper for simulation of the automated system of radiation monitoring of the environment the concept of constructing measurement tools using mathematical apparatus of Markov chains was offered. This concept is implemented as a software package for PC. Using the modeling program package, a virtual system of measuring complex devices gamma-radiation, converting the signal transmission and reception of signals was constructed. A software package for remote control of an automatized system of radiation monitoring "ECOMON" was compiled. The software package is implemented in the programming language Delphi v.5.0 for personal computer type IBM PENTIUM. More >

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588

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S.R.K Vedula¹, T.S. Lim², W. Hunziker³, C.T. Lim¹
The International Conference on Computational & Experimental Engineering and Sciences, Vol.13, No.1, pp. 29-30, 2009, DOI:10.3970/icces.2009.013.029
Abstract The structural integrity as well as the regulation of paracellular diffusion of solutes across epithelial monolayers is critically regulated by the intercellular adhesion complex. The intercellular adhesion complex consists of a variety of proteins that perform different physiological functions. While proteins localizing at adherens junctions (nectins and e-cadherins) are important for initiating and stabilizing cell adhesion, proteins localizing at the tight junctions (occludin, claudins and junctional adhesion molecules) act as gates to regulate the diffusion of solutes across the epithelial monolayer. Despite significant advancement in the understanding of the biological roles of these cell adhesion proteins in regulating various cellular… More >

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