Open Access

ABSTRACT

Dae Kyeom Park, Do Kyun Kim, Dong Hee Park, Bong Ju Kim, Jeom Kee Paik, Satya N. Atluri
The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.3, pp. 65-66, 2011, DOI:10.3970/icces.2011.019.065
Abstract The global warming has reduced the extent of ice in Arctic region and brought some environmental issues including the rising of sea level and the changing of ecosystem. On the other hand, it is also true that the possibility of using Arctic sea route by trading ships and of developing the subsea resource in the Arctic region by offshore installations is increasingly growing due to the global warming. There are still a lot of challenging issues to be resolved for robust design of ships and offshore structures operating in Arctic region.
The aims of the… More >

View

1196

Download

859

Open Access

ABSTRACT

Du Chan Kim, Sang Jin Kim, Jung Kwan Seo, Bong Ju Kim, Jeom Kee Paik, Satya N. Atluri
The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.3, pp. 67-68, 2011, DOI:10.3970/icces.2011.019.067
Abstract In offshore plant and FPSO topsides, the probability against fire hazard is existed due to complicated processing such as production, storage and offloading oil and gas. High temperature and heat flux from fire accident cause a serious damage on human, environment and primary structures.
The aim of this study is to analyze behaviors and reduction effect of thermal radiation by various heat shields through computational and experimental method.
In this test, flat plate type, corrugated plate type, perforated plate type and wire mesh type heat shield were used. Heat flux and temperature were measured More >

View

1102

Download

787

Open Access

ABSTRACT

Ju Hye Park, Jeom Kee Paik, S.N. Atluri
The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.3, pp. 69-70, 2011, DOI:10.3970/icces.2011.019.069
Abstract The aim of the present paper is to develop a semi-analytical method which and quickly and accurately compute the ultimate strength response of rectangular plates under combined loads and non-uniform lateral pressure. It is assumed that the plating is simply supported at four edges which are kept straight. A unique feature of developed method was found to give reasonably accurate results for practical design purpose in terms of the large deflection analysis of plates under non uniformed lateral pressure. The present paper treated by analytically solving the nonlinear governing differential equations of the elastic large More >

View

1093

Download

791

Open Access

ABSTRACT

Sang Jin Kim, Dae Hyun Kim, Du Chan Kim, Jung Min Sohn, Jung KwanSeo, Bong Ju Kim, Jeom Kee Paik, S.N. Atluri
The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.3, pp. 71-72, 2011, DOI:10.3970/icces.2011.019.071
Abstract The movement of various cargos is needed due to rise of global container traffics. Ships are ideal vehicles for transportation and have many construction types such as container ship, bulk carrier, oil tanker, and car carrier. Ships like these are serviced all over the world. Ships are subjected to various environmental loads during operation. To sustain these various loads, ships should be designed guaranteeing structural safety and economical efficiency as well.
Stiffened panels consist of plates and supporting members and are commonly used in the ship building and ocean engineering industry. Ship structures are normally… More >

View

1109

Download

787

Open Access

ABSTRACT

Sanghyun Shim, Kwangjin Kim, Sangchul Lee, Sangho Ko, Jayoung Kang, Dongyoung Rew, Gwanghyeok Ju
The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.3, pp. 73-74, 2011, DOI:10.3970/icces.2011.019.073
Abstract The aim of this paper is to discuss the main issues related to modeling and simulation of the Korean lunar module. Lunar module usually consists of a rigid platform, attitude control actuators and a fuel tank. For dynamical modeling, we first assumed the lunar module as a rigid body and derived equations of motion by considering allocation of reaction thrusters and reaction wheel assembly(RWA). Fuel sloshing in lunar module and its influence on attitude dynamics are an important issue in the research field of space technology. In order to include the effect of fuel sloshing More >

View

1206

Download

779

Open Access

ABSTRACT

Duning Li, Yufeng Niei?a, Xuemei Zhou, Li Cai
The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.3, pp. 75-76, 2011, DOI:10.3970/icces.2011.019.075
Abstract In this study, the efficient discrete model including the resin infusion and the fiber compaction is developed to simulate the RFI (resin film infusion) process. The non-linear governing equations are derived by the Darcy's law, the Terzaghi's law and the continuity equations. The finite element method and the finite difference method are used to discretize the proposed equations, and the VOF method is used to track the filling front. Compared with the analytical results of Park, our numerical results agree well with them. Furthermore, we analyze the RFI process of BMI/G0814, and simulate the resin More >

View

1076

Download

844

Open Access

ABSTRACT

Nobuko Ohba, Shuji Ogata
The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.3, pp. 77-78, 2011, DOI:10.3970/icces.2011.019.077
Abstract We have been developing the concurrent-type, hybrid quantum-classical simulation scheme for various atomic processes at liquid-solid interfaces [1]. In this scheme, the density-functional theory (DFT) method is applied to the "quantum" region to calculate the electronic structure; while the semi-empirical inter-atomic potential, to the "classical" region. In this talk we review its recent developments both from methodology and application viewpoints.
In the hybrid simulation, the DFT method that is applied at each time-step to a cluster of typically a hundred atoms (i.e., the QM region) consumes most of the computation power. It is highly desirable… More >

View

1183

Download

848

Open Access

ABSTRACT

Du Qinghai, Cui Weicheng, Wang Yongjun
The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.3, pp. 79-80, 2011, DOI:10.3970/icces.2011.019.079
Abstract The spherical shell is a typical form of revolution shells, which is widely used in pressure vessel and piping industry, nuclear power industry and ocean engineering for its specific structural shape to obtain kinds of performance. However compared to the cylindrical or conical shell, the spherical shell is mainly used as main structure or pressure hull in underwater engineering because of the superiority of theoretical solution and its manufacture. For the significance of the spherical shell, many researchers in the region of engineering and mechanics have spent great efforts to solve it and do lots… More >

View

1043

Download

772

Open Access

ABSTRACT

Victor A. Eremeyev
The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.3, pp. 81-82, 2011, DOI:10.3970/icces.2011.019.081
Abstract The aim of this work is to discuss the nonlinear theory of shells made of material undergoing phase transitions (PT). The interest to mechanics and thermodynamics of thin-walled structures with PT is motivated by the recent investigations of thin martensitic films and biological membranes. Here we present statements of the boundary-value problems of shells and plates with PT within the dynamically and kinematically exact theory of shells. In this shell theory the translation and rotation fields are the kinematically independent variables. The theoretical model is illustrated by the examples of thin circular cylindrical shell and More >

View

1046

Download

801

Open Access

ABSTRACT

A. Takayama, S. Saito, A. M. Ito, S. Yonemura, H. Nakamura
The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.3, pp. 83-84, 2011, DOI:10.3970/icces.2011.019.083
Abstract We have been developing a molecular dynamics (MD) simulation code, a binary collision approximation (BCA) based simulation code, and a BCA-MD hybrid simulation code. In this paper, an overview of the codes is presented. BCA-based simulation results of hydrogen isotopes injection into graphite target are also shown. Detailed description is given as a full abstract. More >

View

1050

Download

813

Open Access

ABSTRACT

Hui Han, Yi Wah Mak, Wei Huang
The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.3, pp. 85-86, 2011, DOI:10.3970/icces.2011.019.085
Abstract The root of Salvia miltiorrhiza bunge, Danshen, is a traditional Chinese herb known to prevent hypertension. However, the mechanism of how Danshen affects the mechanical properties of blood vessel is not clear. In this project, we studied the effects of Danshen on zero-stress state of rat's abdominal aorta, which is the basic configuration of blood vessel affected solely by intrinsic parameters.
Sprague Dawley rats, male, around 350g, were used. The zero-stress state of a blood vessel can be very different from the in vivo state and the no-load state of the vessel. At the in… More >

View

1045

Download

794

Open Access

ABSTRACT

Li Shan, Ming Cheng, Kaixin Liu
The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.3, pp. 87-88, 2011, DOI:10.3970/icces.2011.019.087
Abstract In the present paper, a combined scheme of discrete element method (DEM) and meshless method for numerical simulation of impact problems is proposed. Based on the basic principle of continuum mechanics, an axisymmetric DEM framework is estabilished for modeling the elastoplastic behavior of solid materials. A failure criterion is introduced to model the transformation from a continuum to a discontinuum. The friction force between contact elements is also considered after the failure appears. So our scheme can calculate not only the behavior of continuum and discontinuum, but also the transformation process from continuum to discontinuum. More >

View

1056

Download

882

Open Access

ABSTRACT

Qiang Wang, Tie Liu, Yin Liu, Yi Yuan, Jicheng He
The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.3, pp. 89-90, 2011, DOI:10.3970/icces.2011.019.089
Abstract Recently, the application of high magnetic fields to materials processing is considering a promising approach to prepare functional materials with special performances. In the present study, based on the techniques of solidification, quenching, and isothermal annealing in both the semisolid and melting states in high magnetic fields, the solidified structure evolution of the Mn-Sb and Al-Ni alloy systems was systematically studied under different magnetic field conditions. A novel method was proposed to in situ fabricate the graded or aligned materials using gradient or uniform high magnetic fields. The results show that the primary MnSb particles… More >

View

1033

Download

766

Open Access

ABSTRACT

Janusz Badur, MichaA, Karcz, Marcin LemaA"ski, Lucjan NastaA,ek
The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.3, pp. 91-92, 2011, DOI:10.3970/icces.2011.019.091
Abstract Due to last mass flow rate measurements in gas micro and nano-channels several discrepancies in the mathematical modeling have been arise. The most important one, is the "flow enhancement" related with the wall slip phenomena. Thus, in the literature, there is opinion that the Navier-Stokes slip condition is correct only in certain restricted circumstances, particularly those restricted to the first order boundary conditions. A one possible way for solving of the above discrepancies, used recently in the literature, is developing a variety of so-called ßecond order boundary conditions". This way is incorrect since it always… More >

View

1098

Download

745

Open Access

ABSTRACT

Ralph H. Scheicher
The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.3, pp. 93-94, 2011, DOI:10.3970/icces.2011.019.093
Abstract The purpose of this talk is to provide an overview of the most recent theoretical studies undertaken by us in the field of hydrogen storage materials research. On selected examples, the application of our computational tool of choice, density functional theory, will be illustrated to show how ab initio calculations can be of use in the effort to reach a better understanding of hydrogen storage materials and to occasionally also guide the search for new promising approaches. Systems to be discussed include: Metal-organic frameworks, where we have studied hydrogen physisorption in three different types of… More >

View

1101

Download

796

Open Access

ABSTRACT

R. Muhammad*, A. Maurotto, M. Demiral, A. Roy and V.V. Silberschmidt
The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.3, pp. 95-96, 2011, DOI:10.3970/icces.2011.019.095
Abstract Analysis of the cutting process in machining of modern engineering materials (Ti- and Ni-based alloys), which are hard-to-cut materials, is a challenge that needs to be addressed. Machining of these alloys with conventional techniques is difficult and often results in tool failure due to the high cutting forces imposed on the tool. In a machining operation, cutting forces causes severe deformations in the proximity of the cutting edge, producing high stresses, strain, strain-rates and temperatures in the workpiece.
Ultrasonically assisted turning (UAT) is an advanced machining process, which has shown several advantages especially in the… More >

View

1249

Download

809