Bin GU, LC Zhang

The International Conference on Computational & Experimental Engineering and Sciences, Vol.18, No.3, pp. 89-90, 2011, DOI:10.3970/icces.2011.018.089

Abstract Bridging the atomic and continuous analyses is an important aspect in multi-scale mechanics. This paper develops a computational method to integrate the atomic potential of a material with the finite element method. The novelty of this method is that the strain energy is calculated from the atomic potential without the assumption in the Cauchy-Born rule that deformation in a virtual atomic cell is homogeneous. In our new method, the virtual atomic cell deformation is interpolated according to the continuum displacements constructed associated with the shape functions. The applications of the method to single crystal Si and Ge bars under uniaxial… More >

Choong- Han Han, Hei-Sook Nah, Won-Sik Choi, Ki-Beom Ju, Jong-Kwan Song

The International Conference on Computational & Experimental Engineering and Sciences, Vol.18, No.3, pp. 87-88, 2011, DOI:10.3970/icces.2011.018.087

Abstract This study is aimed at improving the safety and maximizing construction productivity by effectively grafting SOC facility construction material to RFID/USN technology for the purpose of science in the maintenance of SOC facility. More >

D. Shaw, W.L. Su

The International Conference on Computational & Experimental Engineering and Sciences, Vol.18, No.3, pp. 85-86, 2011, DOI:10.3970/icces.2011.018.085

Abstract The contact angle affects the life and accuracy of a linear gudieway. In this study, the factors which effect the angle of contact angle of linear guideway includes contact deformation of balls and grooves, downward load, ball diameter, number of load-carrying balls, number of load-carrying rows and conformity. A theoretical approach for finding the contact angle changed of linear gudieway is proposed by using Hertzian theory and Lundeberg/Palmgren approach. The results are useful for modification of loading capability of linear gudieway under load and different preload setting. More >

Cheng Yan, Zhuo-Cheng Oui?a, Zhuo-Ping Duan, Feng-Lei Huang

The International Conference on Computational & Experimental Engineering and Sciences, Vol.18, No.3, pp. 83-84, 2011, DOI:10.3970/icces.2011.018.083

Abstract Dynamic behaviors of tensile strength of brittle materials are investigated analytically, and an explicit mathematical expression for the dynamic tensile strength under a quadratic boundary loading is derived, together with the so-called structural-temporal failure criterion. The analytical solution shows reasonably good agreement with the previous dynamic experimental data. Moreover, it is shown by using the explicit expression that the dynamic tensile strength of brittle materials can be determined completely by the quasistatic material parameters such as the quasistatic tensile strength, material density and the incubation-time, which implies that the so-called strain-rate effect on the strength of brittle materials should not… More >

D. Shaw, W.L. Su

The International Conference on Computational & Experimental Engineering and Sciences, Vol.18, No.3, pp. 81-82, 2011, DOI:10.3970/icces.2011.018.081

Abstract Linear rolling ball guideway is a key component of many machines. However, due to the point contact between the ball and the groove, stiffness of linear guideway is the major factor which affects the rigidity and precision of machines. Preload in the guideway can increase the stiffness of linear guideway and thus reduces the position deviation under an external load. The purpose of this study is to develop FEA and compare the results with experimental results to prove the correctness of the FEA model. This model can be used to predict the stiffness of linear guideway with 4 rows of… More >

J. Sladek, V. Sladek, M. Wonsche, Ch. Zhang

The International Conference on Computational & Experimental Engineering and Sciences, Vol.18, No.3, pp. 79-80, 2011, DOI:10.3970/icces.2011.018.079

Abstract It is well known that the coupling nature of piezoelectric materials has led to their wide applications. Interface failure is one of the most dominant failure mechanisms in laminated piezoelectric elements and structures. A meshless method based on the local Petrov-Galerkin approach is proposed, to solve the interface crack problem between two dissimilar piezoelectric solids. Permeable and impermeable electrical boundary conditions are considered on the crack faces. Stationary governing equations for electrical fields and the elastodynamic equations with an inertial term for two-dimensional (2-D) mechanical fields are considered. Nodal points are spread on the analyzed domain, and each node is… More >

Xianyu Su, Qican Zhang, Wenjing Chen

The International Conference on Computational & Experimental Engineering and Sciences, Vol.18, No.3, pp. 77-78, 2011, DOI:10.3970/icces.2011.018.077

Abstract Fourier transform method has been widely sued on fringe analysis in optical metrology, including the structured illumination metrology and the interference metrology. The Fourier transform profilometry is one of the popular non-contact 3-D shape measurement methods, where a Ronchi grating or sinusoidal grating is projected onto a 3-D diffuse surface, and the resulting deformed grating image is detected by a CCD camera and processed by a computer. This method requires only one frame of the deformed fringe pattern to retrieve the surface of measured object, so it has obvious advantage for real-time data acquisition and 3-D measurement of dynamic process.… More >

LI Tao, Gao Jian, ZHANG Yi-ping

The International Conference on Computational & Experimental Engineering and Sciences, Vol.18, No.3, pp. 75-76, 2011, DOI:10.3970/icces.2011.018.075

Abstract This paper presents a method for the large strain consolidation analysis of soft-clay road embankment with stochastic parameters to random excitation. Based on the large strain theory of continuum material, Biot consolidation theory and Neumann stochastic finite element method (NSFEM), the large strain consolidation NSFEM (LSC-NSFEM) has been established. A program of LSC-NSFEM is designed to analyze soft-clay road embankment. The residue iteration method is used to deal with the nonlinear fluctuating part of stiffness matrix, and the approximate algorithm of the fluctuating part of stiffness matrix is designed to improve LSC-NSFEM program efficiency. More >

Xuedong Bai

The International Conference on Computational & Experimental Engineering and Sciences, Vol.18, No.3, pp. 73-74, 2011, DOI:10.3970/icces.2011.018.073

Abstract The in-situ transmission electron microscopy (TEM) method has been developed to probe the novel properties of nanomateials. It is powerful in a way that it can directly correlate the microstructure of the nanomaterials with their physical properties for the same nanoscale sample. In this talk, I will report on the construction and applications of a home-made in-situ TEM platform for nanomanipulation and nanomeasurements.

Mechanics and electromechanical coupling of individual nanowires have been studied inside TEM. The mechanism of resistance switching effects of nanoscale ionic conductors has been revealed by in-situ TEM high-resolution observation. And the transport properties of carbon… More >

Yao-Ming Zhang, Zhao-Yan Liu, Jeng-Tzong Chen

The International Conference on Computational & Experimental Engineering and Sciences, Vol.18, No.3, pp. 71-72, 2011, DOI:10.3970/icces.2011.018.071

Abstract Abstract The presentation is mainly devoted to the research on the regularized boundary integral equations with indirect unknowns for anisotropic elastic problems. Based on a new idea, a novel regularization technique is pursued, in which the nonsingular indirect BIE excluding the CPV and HFP integrals is established. The proposed indirect BEM has many advantages. Firstly, the anisotropic problems to be considered can be solved directly without transforming them into isotropic ones so that no inverse transform is required. Secondly, the proposed method doesn't need to calculate multiple integral as the Galerkin method, and but rather treat CPV integrals indirectly, so… More >