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. have proposed and developed a… More >

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 >

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 >

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 >

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 >

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 >

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 >

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 >

Dong Zhengzhu, Peng Weihong, Li Shuncai¹

The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.2, pp. 67-68, 2011, DOI:10.3970/icces.2011.017.067

Abstract Due to the complexity of thermal elastic problems, analytic solutions have been obtained only for some axisymmetrical problems and simply problems. Yu De-hao discussed bending problems of plates with the natural boundary element method. Using the above method, Li Shun-cai discussed the bending problems of solid circular plates] and bending deflections for annular infinite plates under the boundary loads.

On the basis of the same method, expanding the boundary slope into Fourier series, and using several convolution formulae, the boundary integral formula and natural boundary integral equation for the boundary value problems of thermal bending of Circular Plates are… More >

Hongying Huang, Dehao Yu

The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.2, pp. 65-66, 2011, DOI:10.3970/icces.2011.017.065

Abstract In this paper, we apply the coupling of local discontinuous Galerkin(LDG) and natural boundary element (NBE) methods to solve a class of exterior transmission problems in the plane. As a consequence, the main features of LDG and NBEM are maintained and hence the coupled approach benefits from the advantages of both methods. Referring to cite{Gatica2010}, we employ LDG subspaces whose functions are continuous on the coupling boundary. The continuity can be implemented either directly. In this way, the normal derivative becomes the only boundary unknown, and hence the total number of unknown functions is reduced by two. We prove the… More >