E. Krause¹, W. Schröder¹, M. Klaas¹, O. Thomer¹

The International Conference on Computational & Experimental Engineering and Sciences, Vol.5, No.1, pp. 41-46, 2008, DOI:10.3970/icces.2008.005.041

Abstract In supersonic flow the leading edge vortex of delta wings can encounter intersection by an oblique or a normal shock. The resulting interaction between the two influences the aerodynamic forces, in particular the lift, especially if vortex breakdown occurs. This problem was studied in an idealized form by assuming an isolated slender vortex being intersected by an oblique and a normal shock, respectively. The investigation was carried out in two coordinated companion studies, one using numerical solutions of the Euler and Navier-Stokes equations, and the other experimental techniques, i. e. flow visualization methods, and Laser-Doppler More >

T-P. Chang¹, M-F. Liu²

The International Conference on Computational & Experimental Engineering and Sciences, Vol.5, No.1, pp. 35-40, 2008, DOI:10.3970/icces.2008.005.035

Abstract In the present study, we perform the non-linear vibration analysis of an elastic plate subjected to weak fluid loading in an inclined magnetic field. The structural nonlinearity, fluid nonlinearity, and the effects of magnetic field are all incorporated in the formulations to derive the governing equation of the plate. The method of multiple scales is adopted to determine the eigenvalues and mode shapes of the linear vibration, and then the amplitude of the nonlinear vibration response of the plate is calculated. Based on the assumptions of ordering and formulations of multiple scales, it can be… More >

Vijaya Bhaskar Chalivendra¹

The International Conference on Computational & Experimental Engineering and Sciences, Vol.5, No.1, pp. 27-34, 2008, DOI:10.3970/icces.2008.005.027

Abstract Asymptotic analysis coupled with Westergaard stress function approach is used to develop quasi-static stress fields for a crack oriented along one of the principal axes of inhomogeneous orthotropic medium. In the formulation, four independent engineering constants, E₁₁, E₂₂, G₁₂, v₁₂ are replaced by an effective stiffness E = √E₁₁E₂₂, a stiffness ratio δ = (E₁₁/E₂₂), an effective Poisson's ratio v = √v₁₂v₂₁, and a shear parameter k = (E/2G₁₂)-v. It is assumed that the effective stiffness varies exponentially along one of the principal axes of orthotropy. The first two terms in the expansion of stress field are derived to explicitly bring More >

Hasan Aftab Saeed¹, Satoshi Izumi¹, Shinsuke Sakai¹, Shigeyuki Haruyama², Masato Nagawa³, Hideki Noda³

The International Conference on Computational & Experimental Engineering and Sciences, Vol.5, No.1, pp. 21-26, 2008, DOI:10.3970/icces.2008.005.021

Abstract This is the first attempt toward the development of robust design methodology applicable to gaskets as there is no such precedent in the sealing industry. This was achieved by drastically transforming the traditional approach toward the solution to leaking problem. This paper deals with a new all-metal gasket that incorporates strategically located circumferential annular lips that form seal lines with the flanges. The gasket, due to its special shape makes use of the material's spring effect, resulting in sealing performance. This approach is clearly distinct from the traditional one based on material development. By transforming More >

L. H. Feng¹, J. H. Feng¹

The International Conference on Computational & Experimental Engineering and Sciences, Vol.5, No.1, pp. 15-20, 2008, DOI:10.3970/icces.2008.005.015

Abstract The primary scheme of unilaterally pursuing fast economic development at the expense of the environment and the secondary scheme focusing on environmental protection as the primary goal by slowing economic development are both undesirable for Yiwu. The third scheme balancing economic development with environmental protection is the most effective scheme. More >

YANG Song-lin¹, MA Qing-wei², CHEN Shu-ling¹, GAO Lei¹, WU An¹

The International Conference on Computational & Experimental Engineering and Sciences, Vol.5, No.1, pp. 7-14, 2008, DOI:10.3970/icces.2008.005.007

Abstract An 11.8m-long gliding-hydrofoil craft with a T-formed hydrofoil and shallow V-shaped bottom is chosen to carry on in this work. Resistance test in towering tank is the main method. Two different installation angle (-1.5° and 0° ) of hydrofoil are conducted and the tests were done separately. Relevant results of different resistance performance have been got under the influence of different hydrofoil installation angle. More >

Q.W. Ma¹

The International Conference on Computational & Experimental Engineering and Sciences, Vol.5, No.1, pp. 1-6, 2008, DOI:10.3970/icces.2008.005.001

Abstract In the MLPG_R (Meshless Local Petrove-Galerkin based on Rankine source solution) method, one needs a meshless interpolation scheme for an unknown function to discretise the governing equation. A new scheme, called simplified finite difference interpolation (SFDI) has been recently devised by the author, which is more efficient and has better convergent property than others. This paper will discuss about how the convergent property is affected by different weight functions. More >

Young-Sook Roh¹, Lan Chung², Seung-Ho Cho², Se-Hyun Yoon², Jung-Tae Noh

The International Conference on Computational & Experimental Engineering and Sciences, Vol.8, No.4, pp. 157-164, 2008, DOI:10.3970/icces.2008.008.157

Abstract The purpose of this research is to develop a new technique to measure the corrosion level of reinforcing rebar which embedded in reinforced concrete structures using infrared(IR) thermographical image. IR thermography has been used various applications for non-destructive test(NDT) area, however, IR thermographical data depend on many parameters that the assessment of reliability and stability becomes very important issue to utilize IR thermographical system. This study presents a technique to quantitatively measure the corrosion level of a reinforcing bar using proposed infrared thermography measurement system. We found out electric heating method has an important effect More >

A.N. Guz¹, V.V. Zozulya²

The International Conference on Computational & Experimental Engineering and Sciences, Vol.8, No.4, pp. 151-156, 2008, DOI:10.3970/icces.2008.008.151

Abstract The contact interaction of opposite faces of cracks in 2-D and 3-D solid is studied. The case of a normal time-harmonic wave loading is studied in more details. The distribution of stress intensity factors as functions of the wave number is investigated. The results are compared with those obtained for cracks without allowance for the contact interaction. More >

F Gentil¹, RM Natal Jorge^2,3, AJM Ferreira⁴, MPL Parente^2,5, PALS Martins^2,6, E Almeida⁷

The International Conference on Computational & Experimental Engineering and Sciences, Vol.8, No.4, pp. 145-150, 2008, DOI:10.3970/icces.2008.008.145

Abstract The ear can be divided anatomically, into three parts: external, middle, and inner ear. The eardrum separates the external from the middle ear. The perforation of the eardrum can result in conductive moderate hearing loss. More >