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G. Seifert, S. Leoni, M. Baldoni
The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.3, pp. 69-70, 2011, DOI:10.3970/icces.2011.017.069
Abstract Energy storage is particular important for advanced fuel-efficient vehicles and mobile applications, rechargeable batteries play a key role for such applications. Lithium-ion batteries are today the leading energy storage systems. However, the cathode materials remain insufficient for the use of lithium-ion batteries. To improve this drawback, cathode materials has to be developed further. Therefore, today, most research is focused on the cathode material, and a precise knowledge of the diffusion/transport behaviour of lithium cations inside battery-cathode materials is critical for improving energy density, material properties, and for estimating the impact of chemical substitution. Computer simulations… More >

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998

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P.F. Yang, X. Zhang, Y. Liu
The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.3, pp. 71-72, 2011, DOI:10.3970/icces.2011.017.071
Abstract The material point method (MPM) is extended to the simulations of material fragmentation due to detonation. A crack modeling scheme based on contact algorithm with material failure process is developed to study the dynamic crack propagation in plastic media. Particles after failure are transformed to a different velocity field by contact method, which makes the crack surface not constrained by grid lines and free to propagate dynamically in any direction even when the material experiences large plastic strain increments. The random characterization of the fragmentation can be described by both microscopic defect and macroscopic failure.… More >

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994

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Liu Bingfei, Dui Guansuo, Zhu Yuping
The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.3, pp. 73-74, 2011, DOI:10.3970/icces.2011.017.073
Abstract Several constitutive models with different yield functions for porous shape memory alloy (SMA) are compared with the experimental date. Different approaches such as upper bound theory and lower bound theory have been adopted and a new correction formula of the yield function is proposed in this work to study the behavior of porous SMAs. Numerical results are compared with the experimental date by Zhao et al (2005). It shows that the researches using upper bound and lower bound are nearly the same and the new correction formula is much closer to the experimental data than More >

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1198

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955

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Ping Hu, Yang Xia, Limin Tang
The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.3, pp. 75-76, 2011, DOI:10.3970/icces.2011.017.075
Abstract In this paper, a modified paradigm of quasi conforming finite element method with truncated polynomial expansions of in-domain displacements and derived expansions of strains is introduced. The purpose is to improve the drawbacks of the traditional one that neglecting the connections between the components of strain and lack of principle in the process of choosing polynomial expansions. Based on the modified framework a four-node quadrilateral flat shell element with complete quadratic polynomials for membrane and bending displacement fields is developed. Numerical tests are carried out for validation of the present element. The results show that More >

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1224

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997

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Zai You YAN
The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.3, pp. 77-78, 2011, DOI:10.3970/icces.2011.017.077
Abstract In the boundary element method, treatment of all the possible singular integrals is very important for the correctness and accuracy of the solutions. Generally, the directional derivative of a weakly singular integral is computed by an integral in the sense of Cauchy principle value if the directional derivative of the weakly singular integral kernel is strongly singular or in the sense of Hadamard finite part integral if the the directional derivative of the weakly singular integral kernel is hypersingular. We will try to discover how the strongly singular and hypersingular integrals are generated and propose… More >

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979

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Yichun Zhou¹
The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.3, pp. 79-80, 2011, DOI:10.3970/icces.2011.017.079
Abstract Advances in Functional Materials More >

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946

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Binbin Pan, Weicheng Cui
The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.3, pp. 81-82, 2011, DOI:10.3970/icces.2011.017.081
Abstract The most critical component of a deep manned submersible is the manned pressure hull. It provides not only a safe living space for pilots and scientists but also provides a proper working condition for non-pressure-resisting and non-water-repellent equipments. At the same time, the weight of the pressure hull occupies a large part of the total weight of the deep manned submersible. So the pressure hull should be designed to have enough strength, water-tightness and as light as possible. As the most commonly used pressure hull type, spherical pressure hull has been used in all the… More >

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1105

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CHAO Zhi-chao^1,3, YU Qi-feng^2,3, JIANG Guang-wen^1,3, FU Si-hua^1,3
The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.3, pp. 83-84, 2011, DOI:10.3970/icces.2011.017.083
Abstract Thanks to its high precision, non-contact feature and low cost, videometrics has found wide application in recent years. However, it is generally suited only for the pose (i.e., position and attitude) measurement of intervisible objects or objects in the same viewing field. The traditional videometric approach cannot be used to measure the pose deformation of objects in a large viewing field or of non-intervisible objects in the large structures commonly used in technological and engineering construction today. To overcome the difficulties encountered in applying traditional videometrics to deformation measurement between non-intervisible objects, Yu et al.… More >

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944

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Paulo M. Pimenta
The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.3, pp. 85-86, 2011, DOI:10.3970/icces.2011.017.085
Abstract This work addresses the development of some alternative hybrid and mixed variational formulations for the geometrically-exact three-dimensional first-order-shear shell boundary value problem [1,2]. In the framework of the complementary-energy-based formulations, a Legendre transformation is used to introduce the complementary energy density in the variational statements as a function of the cross-sectional resultants only. The corresponding variational principles are shown to feature stationarity within the framework of the boundary-value-problem. The main features of the principles are highlighted, giving special attention to their relationships from both theoretical and numerical point of view.

Variational principles constitute the core… More >

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1072

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Murat Demiral, Anish Roy, Vadim V. Silberschmidt
The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.3, pp. 87-88, 2011, DOI:10.3970/icces.2011.017.087
Abstract Industrial applications of Ti-based alloys especially in aerospace, marine and offshore industries have grown significantly over the years primarily due to their high strength, light weight as well as excellent temperature- and corrosion-resistance properties. Since these alloys are hard to machine, there is an obvious demand to develop simulation tools in order to analyze the material's behavior in machining processes, such as a turning, and to optimize process parameters. High levels of strains and strain rates accompanied by generated high temperatures characterize the deformation process in turning. The character of realisation of deformation mechanisms as… More >

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1000

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Ji Wang, Yangyang Chen, Guijia Chen, Jianke Du
The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.3, pp. 89-90, 2011, DOI:10.3970/icces.2011.017.089
Abstract The finite element analysis of quartz crystal resonators is increasingly important due to the precise design requirements in frequency and electrical properties with the consideration of crystal blank, processing, mounting, and packaging. To reduce the computational cost, one proven approach is to use the Mindlin plate theory for the thickness-shear vibrations of crystal plates with electrodes and other complications. This approach has been implemented in parallel finite element method with the sophisticated software components for the solutions of linear systems in terms such as eigenvalues, mode shapes, and amplitudes, which in turn can be used… More >

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1100

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K.Y.Sze, Y.X.Zhou
The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.3, pp. 91-92, 2011, DOI:10.3970/icces.2011.017.091
Abstract In this paper, new rotation-free beam and shell models are presented. Unlike the finite element models, rotation-free models employ integration domains which are smaller than the domains of influence. Hence, they are sometimes known as overlapping elements. The present linear straight beam and plate models are the same as those of Phaal & Calladine in the sense that quadratic interpolation are employed to construct the transverse deflection. Nevertheless, Phaal & Calladine turned to a hinged-angle approach for the linear curved beam and shell models and did not present the geometric nonlinear models. In our formulation,… More >

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954

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Liangchi Zhang
The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.3, pp. 93-94, 2011, DOI:10.3970/icces.2011.017.093
Abstract Understanding the deformation mechanisms of metals under the coupled attack of high strain, high strain rate and high temperature (coupled H3 effect) has become more and more important to the development of new manufacturing technologies. High speed machining (HSM), a new technology to cut high hardness materials, is a typical example, as HSM has become an essential process in making ultra-precision, high-integrity components for devices and structures in the automotive, aeronautical, aerospace and biomedical industries. Nevertheless, due to the high machining speed in HSM, many problems which do not appear in conventional machining will take… More >

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1303

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948

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Mrs.Alice Chia-Mei Liu, Dr.Chang-Chung Yang, Mr.Sheng-Yuan Huang
The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.3, pp. 95-96, 2011, DOI:10.3970/icces.2011.017.095
Abstract Fuel cell technology one of the hottest topics in the green energy industry and has become a popular topic in most of the international green energy symposiums. In the meantime,the development of the fuel cell industry has been recognized as one of the key rising industries in Taiwan. Since 2009,the Industrial Technology Research Institute(ITRI) has collaborated with Chung-Hua Institution for Economic Research(CIER) for implementing the fuel cell demonstration and promotion programs which are supported by the Bureau of Energy, Ministry of Economic Affairs. This program focuses on three major areas for application of fuel cells:backup… More >

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1025

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Wen-Hwa Chen, Chun-Hung Wu, Hsien-Chie Cheng
The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.3, pp. 97-98, 2011, DOI:10.3970/icces.2011.017.097
Abstract The phase transformation behaviors of C60 fullerene under atmospheric pressure are reported using a proposed thermostat molecular dynamics method designed for a solid system. We find that C60 fullerene directly undergoes a solid-vapor phase transformation, instead of a solid-liquid phase transition, at a specific threshold temperature. It reveals that C60 fullerene will sublimate when heated rather than melt under atmospheric pressure. This phenomenon is coincident with that of graphite at pressures below 10MPa. The sublimation point of C60 fullerene, rather than the melting, is about 4350o20K, locating in the published range of about 4000-4500K for More >

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1133

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ZHANG Hongta, GAO Jianling ^*, BAI Yuxing, ZHANG Yueqiang, WANG XiChun
The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.3, pp. 99-100, 2011, DOI:10.3970/icces.2011.017.099
Abstract This paper analyzes transient temperature field with plane elements of finite element method of lines. Finite element method of lines treats transient temperature field line, using a semi-discrete in space, in one direction discrete numerically and another direction with analytical type. Using backward time difference, finally ordinary differential equations are obtained, and solved by ordinary differential equations solver COLSYS. Verification indicates that plane element of Finite Element Method of Lines can obtain transient temperature field with higher precision and faster processing speed. More >

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1010