Hyun Ki¹, Jongwook Choi², Sungcho Kim²

The International Conference on Computational & Experimental Engineering and Sciences, Vol.13, No.4, pp. 69-70, 2009, DOI:10.3970/icces.2009.013.069

Abstract The wake behind rotor blade is investigated by numerical and experimental approaches. Flow structure measured through PIV is compared with numerical analysis using commercial program of ANSYS CFX adopting the RNG k-ε turbulence model. Blade model fabricated by Rapid-Prototype method has the cross section of NACA0012 airfoil and the pitch angle of 10°. The rectangular blade of which rotating diameter (D) and chord length are 0.12 m and 0.024 m respectively rotates at 240 rpm. Horizontal and vertical directions of the blade are selected as x and z coordinates, respectively, the origin locates at the rotating center, and measurement range… More >

H. M. Choi, L. S. Cho, M. H. Ryu J. S. Cho¹, C. T. Kim²

The International Conference on Computational & Experimental Engineering and Sciences, Vol.12, No.1, pp. 7-8, 2009, DOI:10.3970/icces.2009.012.007

Abstract The experimental study on the wake characteristics of turbomachineries is essential, when developing the turbomachineries such as pumps, fans, compressors, turbines. Various sources of losses are analyzed by studying the wake characteristics of turbomachineries. For more accurate analysis, various types of experimental equipments are used. Because of the high frequency response characteristics, the hot-wire anemometery has been widely used to measure the wake characteristics of the turbomachinery. In this research, the flow fields of the small ducted fan as a propulsion device of small R/C aircraft were measured using a hot-wire anemometry at inlet and outlet to analyze the wake… More >

Su-Tsai Lu^1,2, Wen-Hwa Chen¹

The International Conference on Computational & Experimental Engineering and Sciences, Vol.11, No.2, pp. 47-48, 2009, DOI:10.3970/icces.2009.011.047

Abstract For future growing applications in flexible display and wearable electronics, the need of three-dimensional stacking flexible interconnects increases rapidly. One of the core technologies is the development of ultra-thin chip-on-flex (UTCOF) interconnects owing to its high-density and flexibility as chips are thinned down and joined on a flexible substrate using anisotropic conductive adhesive (ACA) (Chen et al., 1999; Jokinen and Ristolainen, 2002; Lu et al., 2006; Lu and Chen, 2008). However, very little work has been devoted to the study of ACA material properties on the thermal-induced warpage for UTCOF interconnects and becomes the main aim of this work.
The… More >

chun-chi Li¹, chin-chiang Wang², yin-chia Su², yu-chen Chu², chia-chu Weng²

The International Conference on Computational & Experimental Engineering and Sciences, Vol.11, No.2, pp. 31-32, 2009, DOI:10.3970/icces.2009.011.031

Abstract The aim of this paper was to establish the realistic breathing patterns in different exercise conditions by experimental measurement. Generally, the human inhalation rate varies from 15 L/min at rest to 135 L/min for intense exercise and the breathing cycles are varied with different exercise conditions. Previous author have used symmetric Weibel configuration to establish three realistic breathing patterns, i. e., resting (inhalation rate, 15 L/min), light activity (inhalation rate, 30 L/min), and moderate exercise (inhalation rate, 60 L/min). In this study, in addition to reconstructing the three realistic breathing patterns of above mention, we expand the establishment of the… More >

Romy P. Moreno¹, Mario G. Villeda², Sergio A. V. Pruneda², Zeferino D. Noriega², Pedro G. Segura²

The International Conference on Computational & Experimental Engineering and Sciences, Vol.8, No.1, pp. 19-24, 2008, DOI:10.3970/icces.2008.008.019

Abstract Measuring the position, speed and acceleration of the moving elements of a mechanism usually involves external instrumentation that has to be attached to it, which is not always feasible. The method discussed here provides an alternative to measure these kinematics characteristics without modifying the components. To test the method in a controlled environment a four-bar mechanism was build. It was designed to be as thin as possible and to allow arbitrary changes in its lengths. Three commercial programs and a specially designed software (KIMA{\textregistered }) are used to record, analyze, measure, compute and verify the kinematics of the mechanism. More >

V.I. Alshits^1,2, R.K. Kotowski^1,3, P. Tronczyk¹

The International Conference on Computational & Experimental Engineering and Sciences, Vol.6, No.4, pp. 207-214, 2008, DOI:10.3970/icces.2008.006.207

Abstract The magnetoplastic effect manifests itself in a transformation of the structure of the impurity pinning centers in crystals exposed to an external magnetic field which modifies their mechanical properties. As a result, an ordinary nonmagnetic crystal becomes a smart material whose physical properties may be controlled by means of the external magnetic treatment. The basic features of this phenomenon and its established physical mechanisms are discussed. A series of results of experimental studies and computer simulations of the magnetoplastic effect are presented. More >

N.Ishizuka¹, T.Okada², T.Ikeno², K.Shiomi², M.Okuma³

The International Conference on Computational & Experimental Engineering and Sciences, Vol.6, No.2, pp. 145-150, 2008, DOI:10.3970/icces.2008.006.145

Abstract The accurate modeling of structures is very important for any engineering analysis such as simulation and design optimization of mechanical systems for noise and vibration. It is desired that such a modeling process should not be time-consuming and that the created model must have structural dynamic properties corresponding with the actual ones. But in practice, it is often difficult or even impossible to satisfy the desire by using conventional theoretical methods such as the Finite Element Method (FEM) when we consider actual mechanical systems which consist of many substructures. In this paper, under the assumption that vibration tests can be… More >

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 >

Waruna Seneviratne¹, John Tomblin², Suranga Gunawardana³

The International Conference on Computational & Experimental Engineering and Sciences, Vol.4, No.2, pp. 81-86, 2007, DOI:10.3970/icces.2007.004.081

Abstract An experimental study was conducted to investigate the use of fracture mechanics to predict failure initiation of adhesive joints. Most practical plane fracture problems are mixed mode and failure initiation of adhesive joints is a result of such conditions. It is widely accepted that a useful method for characterizing the toughness of bonded joints is to measure the fracture toughness; energy per unit area needed to produce failure. For a given adhesive, mode mixity has a dependency towards fracture toughness and fracture toughness is directly associated with stress. Main goal in this investigation was to demonstrate the capability of utilizing… More >

S. Sriram¹, S. Pushpavanam¹, Abhijit P. Deshp,e¹, E.G. Tulapurkara²

The International Conference on Computational & Experimental Engineering and Sciences, Vol.4, No.1, pp. 1-10, 2007, DOI:10.3970/icces.2007.004.001

Abstract The flow in a periodically-driven cavity is studied experimentally using Particle Image Velocimetry (PIV) and the results are compared with Computational Fluid Dynamics (CFD) simulations. The experiments are carried out in a cuboid of 0.1x 0.1m x 0.02 m size with glycerol as the fluid. Measurements are carried out at various amplitudes and frequencies of lid motion. The planar velocity measurements are made at three different z-planes and x-planes. It is found that the temporal variations of x-, y- and z-components of velocities of the flow are periodic, with the imposed plate frequency as the dominant frequency. Computation using FLUENT… More >