Open Access
ABSTRACT
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 down to an atomistic scale… More >
Open Access
ABSTRACT
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. When considering microscopic damage of… More >
Open Access
ABSTRACT
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 others. More >
Open Access
ABSTRACT
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 the present element preserves all… More >
Open Access
ABSTRACT
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 a method to avoid the… More >
Open Access
ABSTRACT
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 >
Open Access
ABSTRACT
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 existing deep manned submersibles such… More >
Open Access
ABSTRACT
CHAO Zhi-chao1,3, YU Qi-feng2,3, JIANG Guang-wen1,3, FU Si-hua1,3
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. have proposed and developed a… More >
Open Access
ABSTRACT
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 of the development of… More >
Open Access
ABSTRACT
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 well as a spatial distribution… More >
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