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Kuo-Ning Chiang¹, Chan-Yen Chou², Chung-Jung Wu², Chao-Jen Huang², Ming-Chih Yew²
The International Conference on Computational & Experimental Engineering and Sciences, Vol.9, No.3, pp. 130-142, 2009, DOI:10.3970/icces.2009.009.130
Abstract An atomic-level analytical solution, together with a modified Morse potential, has been developed to estimate temperature-dependent thermal expansion coefficients (CTE) and elastic characteristics of bulk metals. In this study, inter-atomic forces are considered as a set of anharmonic oscillator networks which can be described by Morse potential, while the material properties can be defined by these inter-atomic forces; when temperature increases, the vibration of the anharmonic oscillator causes the phenomenon of temperature-dependent material properties. The results of analysis showed that the original Morse potential can give a reasonable prediction of the thermal expansion coefficients and elastic constants of metals at… More >

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789

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Amiya Kr. Samanta¹, Somnath Ghosh²
The International Conference on Computational & Experimental Engineering and Sciences, Vol.9, No.3, pp. 143-150, 2009, DOI:10.3970/icces.2009.009.143
Abstract This paper deals with the implementation of hypo-elasticity based 3D constitutive model on Reinforced Concrete (RC) frame employing finite element technique, which uses lower order isometric solid elements HCiS18 with enhanced assumed strain (EAS) formulation to evaluate load-deformation, internal stresses produced in the elastic regime. Due attention has been paid to model concrete and the reinforcing steel with different physical and mechanical properties, which are combined together to represent its composite behaviour accurately in perfect bond situation. An in-house FORTRAN computer code has been developed for the purpose. The results of the finite element analysis are presented, compared and discussed. More >

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833

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L. Dai¹, V.B.C. Tan^1,2, C.H. Sow^1,3, C.T. Lim^1,2,4, W.C.D. Cheong⁵
The International Conference on Computational & Experimental Engineering and Sciences, Vol.9, No.3, pp. 151-162, 2009, DOI:10.3970/icces.2009.009.151
Abstract The mechanisms governing the tensile response of TiO₂ nanowires were studied by molecular dynamics simulations. The free side surfaces of the nanowires were found to be undulating because atoms near the free surface were relaxed into a disordered state during thermodynamic equilibration. For wires below a threshold diameter of around 10 Å, this free surface effect extends throughout the entire wire, resulting in a complete lack of ordered structure. For thick nanowires, the core of the wire retains a crystalline structure. The thicker the wire, the larger the crystalline core and the more dominant is its effect on the tensile… More >

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784

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C. K. Chen¹
The International Conference on Computational & Experimental Engineering and Sciences, Vol.9, No.3, pp. 163-178, 2009, DOI:10.3970/icces.2009.009.163
Abstract A classical alternating iteration method is applied to evaluate the stress intensity factors for a mixed oriented crack approaching semi-infinite plane or a straight crack. Conventional Gaussian-Legedre quadrature scheme is employed for the numerical integration in the crack vs. free boundary interacting problems; however, averaged image stresses along crack surfaces are invoked to simplify the alternating procedures in crack vs. crack interaction. Good correlation was achieved between the iterated solutions and the available solutions in the literature. As crack approach the free semi-infinite plane, mode I affect increases, however, maximum mode II stress intensity factors may shift to the lower… More >

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790

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B.K. Raghu Prasad¹, T.V.R.L. Rao¹, A.R. Gopalakrishnan¹
The International Conference on Computational & Experimental Engineering and Sciences, Vol.9, No.3, pp. 179-196, 2009, DOI:10.3970/icces.2009.009.179
Abstract A simple numerical method namely Initial Stiffness Method using finite element method has been employed to study the size effect which is prominent in concrete structures. Numerous experimental investigations performed on notched plain concrete beams subjected to three point or four-point bending have revealed the fracture process to be dependent on size of the structural member. It was found that, the nominal stress at maximum load decreases as the size of the structure increases. The nominal stress at failure on the characteristic dimension of structure is termed as size effect. This has also been explained in energy concepts as, the… More >

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874

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Y.S. Chen¹
The International Conference on Computational & Experimental Engineering and Sciences, Vol.9, No.3, pp. 197-198, 2009, DOI:10.3970/icces.2009.009.197
Abstract It is important for a company to put themselves under the protection of patent right to keep their unique competitive advantages when they confront global competition. This issue is of particular importance in Taiwan since a growing number of Taiwanese companies have been sued by foreign competitors for patent infringement. For inverter industry, producing labor-saving, energy-saving, space-saving, high-communicational, high-functional, low-noise and cost-saving inverters become a more and more important topic.
This research investigates the state of the art of current inverter technology. By using United States Patent & Trademark Office (USPTO) database, we collect global patent data for inverter technology… More >

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808

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Shy-Pin Cuo¹, Dein Shaw²
The International Conference on Computational & Experimental Engineering and Sciences, Vol.9, No.3, pp. 199-200, 2009, DOI:10.3970/icces.2009.009.199
Abstract The purpose of this study is to present the process of development of HID (High Intensity Discharge) light reflector of a streetlight. The new application of HID light source for streetlight product is proposed in this study, the advantages of HID include low power consumption and single point light source emitting. The study includes the introduction of HID streetlight structure, the lighting efficiency comparison of various light sources (ex. High Pressure Sodium-lamp ``HPS'', High Bright LED ``HB LED'', etc\ldots ), and the design of streetlight reflector. The emphases of the experiment are focused at light reflector design; the streetlight module… More >

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810

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Jiangong Li¹
The International Conference on Computational & Experimental Engineering and Sciences, Vol.9, No.3, pp. 201-202, 2009, DOI:10.3970/icces.2009.009.201
Abstract Nanoparticles are materials with at least one dimension in the 1 to 100 nm range. Nanoparticles exhibit different physical and chemical properties due to large ratio of surface area to volume and small size effects (or quantum effects). Nanoparticles cover almost all materials including ceramics, metals, and polymers. Nanoparticles have a wide variety of applications in catalysis, electrodes, metallurgy, magnetic storage, composite materials, coatings, MEMS or NMES, cosmetics, etc. Shape, size, and dispersity have influence on the crystal structure and properties of nanoparticles. So shape, size, and dispersity are keys to controlling structure and properties of nanoparticles.
This presentation will… More >

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774

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Patrícia C.T. Gonçalves^1,2, João Manuel R.S. Tavares¹, R.M. Natal Jorge¹
The International Conference on Computational & Experimental Engineering and Sciences, Vol.9, No.3, pp. 203-204, 2009, DOI:10.3970/icces.2009.009.203
Abstract The main goals of the present work are to automatically extract the contour of an object and to simulate its deformation using a physical approach. In this work, to segment an object represented in an image, an initial contour is manually defined for it that will then automatically evolve until it reaches the border of the desired object. In this approach, the contour is modelled by a physical formulation using the finite element method, and its temporal evolution to the desired final contour is driven by internal and external forces. The internal forces are defined by the intrinsic characteristics of… More >

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821

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Yohsuke Imai, Hitoshi Kondo, Young Ho KANG, Takuji Ishikawa Chwee Teck Lim, Takami Yamaguchi
The International Conference on Computational & Experimental Engineering and Sciences, Vol.9, No.3, pp. 205-206, 2009, DOI:10.3970/icces.2009.009.205
Abstract Malaria is one of the most serious infectious diseases on earth. We have about five hundred million patients with two million deaths. When a malaria parasite invades and matures inside a red blood cell (RBC), the infected RBC (IRBC) becomes stiffer and cytoadherent. We propose a numerical model of hemodynamics arising from malaria infection. Our model is based on a Lagrangian and free mesh method (particle) method. A spring network model is employed to compute elastic force generated by the deformation of IRBC membrane. Adhesive property of IRBCs to surrounding cells is also expressed by using a local spring model.… More >

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