Open Access
ABSTRACT
T. Uehara1, M. Fukui2, N. Ohno3
The International Conference on Computational & Experimental Engineering and Sciences, Vol.2, No.3, pp. 61-66, 2007, DOI:10.3970/icces.2007.002.061
Abstract Stress evolution during grain growth in microstructure formation process are simulated by using the phase field model. Fundamental equations accounting for the coupling effects among phase transformation, temperature and stress/strain have been formulated based on thermodynamical laws, in which thermal expansion, transformation dilatation, and stress dependency on phase transformation are considered. An elasto-plastic constitutive relationship is applied so as to obtain the residual stresses. Based on these equations, numerical simulations are carried out by the finite element method. Results for two kinds of initial arrangement of nuclei are demonstrated in this paper. One model has four nuclei at the four… More >
Open Access
ABSTRACT
Hong-ying Huang2,1, De-hao Yu 2
The International Conference on Computational & Experimental Engineering and Sciences, Vol.2, No.3, pp. 67-74, 2007, DOI:10.3970/icces.2007.002.067
Abstract In this paper, we apply the coupling of natural boundary element method and finite element method to solve a three-dimensional nonlinear interface problem. Two equations are coupled by interface conditions on the interface boundary. A spherical surface as the artificial boundary is introduced. The equivalent coupled variational problem is described. The existence and uniqueness of the solution of concerned problem as well as the estimates of its approximate solution are obtained. Some numerical examples are presented to demonstrate the effectiveness of this method. More >
Open Access
ABSTRACT
K.S. Kim1, J.H. Yoo2, J.S. Bae3, I. Lee1
The International Conference on Computational & Experimental Engineering and Sciences, Vol.2, No.3, pp. 75-80, 2007, DOI:10.3970/icces.2007.002.075
Abstract In this paper, nonlinear aeroelastic characteristics of a wing with control surface freeplay were investigated. The transonic small disturbance equation was applied to calculate unsteady aerodynamic forces in subsonic/transonic region. The fictitious mass method was used to apply a modal approach to nonlinear structural models. Nonlinear aeroelastic time responses were calculated by the coupled time integration method. In this study, it was found that aerodynamic nonlinearity, initial flap angle and freeplay angle affect aeroelastic characteristics. More >
Open Access
ABSTRACT
B. Brank1
The International Conference on Computational & Experimental Engineering and Sciences, Vol.2, No.3, pp. 81-86, 2007, DOI:10.3970/icces.2007.002.081
Abstract First we shortly present several low-order (4-node) shell finite element formulations (based on Reissner-Mindlin kinematics) that allow for accurate and efficient (with coarse and distorted meshes) analysis of shell-like structures subjected to large deformations and rotations. The formulations are based on mixed variational principle, enhanced assumed strain (EAS) method (based on Green-Lagrange strains) and assumed natural strain (ANS) method. The EAS method is used in all formulations in order to improve both membrane and bending behavior of the 4-node element (the formulations differ from one another by the number of assumed EAS parameters), and the ANS method is used to… More >
Open Access
ABSTRACT
A. Kuwata1, H. Noguchi2, H. Kawai3
The International Conference on Computational & Experimental Engineering and Sciences, Vol.2, No.3, pp. 87-92, 2007, DOI:10.3970/icces.2007.002.087
Abstract In this research, we constructed an e-learning system of the CAE (FEM) education. We analyzed about the usefulness of e-learning from each viewpoint of a software developer of the e-learning system, a system administrator of the system, and a user. In addition, we considered about the necessary technology in Web application. More >
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