Open Access
ABSTRACT
George Fitzgerald, Michael Doyle
The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.1, pp. 1-2, 2011, DOI:10.3970/icces.2011.017.001
Abstract Molecular modeling can provide a detailed understanding of structures, properties, and processes for materials as diverse as organic molecules, polymer blends, or alloys. Yet, these methods have generally been restricted to length scales of 100 nm and time scales of 10-6 seconds, which limits their usefulness for research problems on the engineering scale. In this work, we discuss several approaches for extending their domain of applicability to the macro-scale.
Enhancements to atomistic modeling methods make it possible to apply accurate atomistic models to problems in electronics materials, alloys, and polymers. Statistical methods such as Quantitative Structure-Activity Relationships (QSAR) extend… More >
Open Access
ABSTRACT
Jianguo Zhu, Huimin Xie, Fulong Dai
The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.1, pp. 3-4, 2011, DOI:10.3970/icces.2011.017.003
Abstract Thermal barrier coatings (TBCs) are widely used in turbines for propulsion and power generation. During build up the coatings, the continuity of the strain at the interface results in the residual stress because of the thermal expansion misfit. Since the formation of residual stresses cannot be avoided, they have to be optimized by adaptation of the process parameters during coating manufacturing. Therefore, in order to obtain information about the characterization of residual stresses for specific process conditions, the development of residual stress measurement is of vital importance.
In this paper, several techniques on residual stress measurement are reviewed, including… More >
Open Access
ABSTRACT
Jin Li, Dehao Yu
The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.1, pp. 5-6, 2011, DOI:10.3970/icces.2011.017.005
Abstract The composite rectangle (midpoint) rule for the computation of multi-dimensional singular integrals is discussed, and the superconvergence results is obtained. When the local coordinate is coincided with certain priori known coordinates, we get the convergence rate one order higher than the global one. At last, numerical examples are presented to illustrate our theoretical analysis which agree with it very well. More >
Open Access
ABSTRACT
ZHANG Jian-wen, LI Ya-chao, CHEN Jian-feng
The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.1, pp. 7-8, 2011, DOI:10.3970/icces.2011.017.007
Abstract The exploration on the microscale transport phenomena in RPB is of significance to understand the mechanism of microscale mixing and chemical reaction therein. On the basis of previous studies, numerical simulation is carried out and the numerical results are compared with the experimental results in this paper to indirectly determine the thickness of the liquid film. Appropriate modification on the rotational component of the velocity of the liquid film is proposed and the numerical result is in reasonable agreement with the experimental result. The fluid flow and the species transfer with a parallel reaction are studied to obtain the evolution… More >
Open Access
ABSTRACT
WANG Hong-tao, SUN Li-bin, WANG Haitao, MA Shao-peng
The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.1, pp. 9-10, 2011, DOI:10.3970/icces.2011.017.009
Abstract Nuclear graphite is a fine high-temperature structural material, so it has been widely used to manufacture graphite bricks of the reflectors in high temperature gas-cooled reactors (HTGRs). Since graphite bricks are stacked together and interconnected by keys and keyways, the collision between graphite bricks will happen when the seismic load or other load is applied. In order to study the collision behavior, a collision test system was built. The velocities of two graphite bricks were measured by a high-speed image capturing technology, and the coefficient of restitution and contact time was obtained by the velocity-time curve. The experimental results show… More >
Open Access
ABSTRACT
Zhengfa Li, Weibin Song, Zhengdao Wang
The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.1, pp. 11-12, 2011, DOI:10.3970/icces.2011.017.011
Abstract By using the high froze/recovery strains of shape memory polymers to meet the requirements of deployable space structures, the folding behavior of shape memory tape spring structures consisting of shape memory polymer and metal spring was analyzed. Firstly, numerical simulations were performed on the buckling modes and affecting factors under the equal- and opposite-sense bends. The results show that the folding deformations of such structure in the two cases are completely different. The equal-sense bending leads to the structure buckled abruptly, but gradual torsion buckling is received in the case of opposite-sense bending. The critical bending moments have big difference… More >
Open Access
ABSTRACT
L.Y. Wang, W. B. Song Z.D. Wang
The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.1, pp. 13-14, 2011, DOI:10.3970/icces.2011.017.013
Abstract Shape memory epoxies and their composites have great potential applications in future deployable space structures industry. In this study six types of shape memory epoxies with different shape transition temperatures were synthesized by varying the curing agents and their contents. Thermal frozen/recovery test, DSC and DMA were performed to investigate their shape memory behaviors and thermomechanical properties. Further discussions about the testing results were presented with consideration of the microstructure. More >
Open Access
ABSTRACT
Hiromoto Susawa
The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.1, pp. 15-16, 2011, DOI:10.3970/icces.2011.017.015
Abstract Liquid Phase Epitaxy is a crystal growth on a substrate from liquid solution, which is a melt in this paper. Before growth, a melt is separated from a substrate and supercooled. When growth starts, the melt moves to the substrate. This induces flow in the melt. This paper considers the influence of flow on the composition of solid phase, reviews previous simulation models and introduces a new model. A one-dimensional model explained an experimental result and a major behavior of solid compositional variation. A semi-two-dimensional (semi-2-D) model dealt with transport in the melt as 2-D but substituted the values at… More >
Open Access
ABSTRACT
Emrah Demirci, Memi AY Acar, Behnam Pourdeyhimi, Vadim V.Silberschmidt
The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.1, pp. 17-19, 2011, DOI:10.3970/icces.2011.017.017
Abstract Nonwovens are polymer-based engineered textiles having randomly distributed fibres bonded together with mechanical, thermal or chemical techniques. This paper focuses on thermally bonded nonwoven fabrics manufactured with bicomponent fibres. Such fibres have a core/sheath structure, with a material of the inner region - core - having a higher melting temperature than that of the surface region (sheath). During the bonding of these fibres, a hot calender with an engraved pattern contacts a fibre web causing the sheath part of fibres to melt; the latter acts as an adhesive while the fibres' core part remains fully intact. As a result of… More >
Open Access
ABSTRACT
Zhu Jianming, Zhang Hongtao, Wang XiChun, XU Bingye
The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.1, pp. 20-20, 2011, DOI:10.3970/icces.2011.017.020
Abstract Aiming at the limitation and the insufficiency of the research methods for the slope stability in the open-pit and underground combined mining, firstly according to the characteristic of the slope stability in the open-pit and underground combined mining, and the limit analysis method of the slope stability based on the upper bound theorem of the plasticity mechanics, the maneuvering displacement field for the subsidence rock mass of the underground long-wall mining is established, for the subsidence rock mass the function equation is established using the plastic limit analysis method. Secondly, using this method this paper researches the surface subsidence rock… More >
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