Yong-Jun Jang¹, Hag-Beom Kim^1,2, Woo-Sung Jung¹

The International Conference on Computational & Experimental Engineering and Sciences, Vol.11, No.1, pp. 19-26, 2009, DOI:10.3970/icces.2009.011.019

Abstract In this study, fire simulations were performed to analyze the characteristics of the fire driven flow and the effects of the platform screen door on the smoke flow in the station, when the fire occurred in the center of the platform. Soongsil Univ. station (line number 7) was chosen which is the one of the deepest (47m) underground subway stations in the Seoul metro(SMRT). The parallel computational method was employed to compute the heat and mass transfer eqn's with 6 CPUs of the Linux clustering machine. The fire driven flow was simulated using FDS code in which LES method was… More >

Emil Budescu¹

The International Conference on Computational & Experimental Engineering and Sciences, Vol.11, No.1, pp. 17-18, 2009, DOI:10.3970/icces.2009.011.017

Abstract For the visco-plastic materials of type Bingham fluid, like granular materials, the process of flow begins when the force F^ˉ, which variation is presented in figure 1, reaches the minimum value of shearing limit. More >

Alaimo A.¹, Milazzo A.¹, Orlando C.¹

The International Conference on Computational & Experimental Engineering and Sciences, Vol.11, No.1, pp. 9-16, 2009, DOI:10.3970/icces.2009.011.009

Abstract The main target of the present paper is the analysis of the fracture mechanics behavior of delaminated composite structures actively repaired through piezoelectric patches. The aim at issue has been achieved by using a boundary element code implemented to study piezoelectric solids, including, as limiting case, the applicability to linear elastic anisotropic materials. The assembled structures, made up of the damaged composite components and the piezoelectric patches, have been modeled through the multidomain technique. To take into account for the adhesive layer among the host structure and the active patch, an interface spring-model has been also implemented. The multidomain technique… More >

Wen-Hsiang Tsieh¹, Kuen-Ming Shu², Chia-Heng Tsai¹

The International Conference on Computational & Experimental Engineering and Sciences, Vol.11, No.1, pp. 7-8, 2009, DOI:10.3970/icces.2009.011.007

Abstract The objective of this paper is to propose a novel press of Stephenson type, and verify its feasibility. First, the system is presented and its advantages are discussed. Then, the kinematic analysis of the system is obtained by examining the geometry of the design. Finally, a design example is given to verify the feasibility of the design by conducting computer simulation. All the above analysis and design are illustrated by using Stephenson type mechanism. The results show that the developed system is feasible and with high potential to be applied to a press for precision forming. More >

Ming-Hsiao Lee^1,2, Wen-Hwa Chen¹, Yu-Ching Shih²

The International Conference on Computational & Experimental Engineering and Sciences, Vol.11, No.1, pp. 5-6, 2009, DOI:10.3970/icces.2009.011.005

Abstract In the electrostatic-structural problems as encountered in many electrostatic driven MEMS devices, the electrostatic analysis domain is often extremely distorted due to the deflection of the structure. This kind of problem is difficult to deal with by almost all kinds of available numerical methods. A new three-dimensional meshless scheme with background grid is thus proposed herein to solve those difficulties in numerical simulations.
By this scheme, a three-dimensional fixed background grid with regularly distributed nodes is utilized. Another set of discretized boundary grid is employed to describe both the surface boundaries of the structure and the electrostatic field. The analysis… More >

Eugen Merticaru, Emil Budescu

The International Conference on Computational & Experimental Engineering and Sciences, Vol.11, No.1, pp. 3-4, 2009, DOI:10.3970/icces.2009.011.003

Abstract The paper deals with the problem of motion of human upper limb so that to be ensured the success of the throw in basketball game. For the human upper limb there was considered the model of double pendulum. The classic equation of motion of the ball was correlated with the corresponding equation of motion for the upper limb, so that the ball to pass through the basket. It is well known that the trajectory of a thrown body is a parabola.
The equations of position and velocity of the hand are written and give the initial conditions for the fly… More >

M. Tsuda¹, T. Asada¹, N. Ohno^1,2, T. Igari³

The International Conference on Computational & Experimental Engineering and Sciences, Vol.10, No.3, pp. 2-2, 2009, DOI:10.3970/icces.2009.010.097

Abstract In this study, homogenized elastic-viscoplastic behavior of plate-fin structures fabricated for compact heat exchangers is investigated. First, the homogenized behavior is numerically analyzed using a fully implicit mathematical homogenization scheme of periodic elastic-inelastic solids. A power-law creep equation is assumed to represent the viscoplasticity of base metals at high temperatures. The plate-fin structures are thus shown to exhibit significant anisotropy as well as compressibility in both the elastic and viscoplastic ranges of the homogenized behavior. Second, a non-linear rate-dependent macroscopic constitutive model is developed by utilizing the quadratic yield function proposed for anisotropic compressible plasticity. The resulting constitutive model is… More >

P. Ruzicka¹, P. Bendova¹, S. Konvickova¹

The International Conference on Computational & Experimental Engineering and Sciences, Vol.10, No.3, pp. 91-96, 2009, DOI:10.3970/icces.2009.010.091

Abstract The objective of the study was to prove magnetic resonance imaging as suitable instrument for exploring the nature and amplitude of displacements within the bony pelvis induced by asymmetrically altered pelvic floor muscle characteristics. Repeated MR imaging of 14 females was performed. Spatial coordinates of 23 pelvic landmarks were localized in each subject and registered by interactive and automatic procedures. Modalities of registration procedure were tested and compared by the precision of registration. The software tool was developed to perform registrations and data analyses including individual registration error evaluation. The automatic registration with vertebra L5 as reference has been found… More >

Zone-Ching Lin¹, Ming-Long Huang¹

The International Conference on Computational & Experimental Engineering and Sciences, Vol.10, No.3, pp. 89-90, 2009, DOI:10.3970/icces.2009.010.089

Abstract The paper develops a two dimensional quasi-steady molecular staic model to simulate the vertical down press copper workpiece by down press the nanoscale depth of abrasive grains in different shapes. The research of the down pressing copper workpiece of abrasive grains in this paper uses the hexagonal close packed diamond abrasive grains to down press the perfect face-centered cubic copper. The paper's simulation of down pressing nanoscale depth model of abrasive grain by two dimensional quasi-steady molecular statics model is a step by step to down press copper workpiece by diamond abrasive grain. It is assumed that each atom of… More >

J. Kong¹

The International Conference on Computational & Experimental Engineering and Sciences, Vol.10, No.2, pp. 57-64, 2009, DOI:10.3970/icces.2009.010.057

Abstract For the analysis of prismatic thin-walled structures, whether single or continuous spanned, the finite strip method is one of the most effective methods developed to date. Significant development of the method has been made, in particular, by adopting various analytical functions in the longitudinal direction to suit various support conditions, including the classical beam vibration functions and the spline functions. In contrast to analytically-defined functions, an alternative finite strip method is presented herein by exploring the use of computed beam vibration functions that takes into consideration explicitly the axial-bending coupling effect of unsymmetrical, cross-ply laminates as well as various combinations… More >