Recently, many researchers have a great interest in the research about miniaturization of chemical analysis system and various devices are being developed. These systems and devices are subject to complicated coupled phenomena (gas-liquid, liquid-liquid etc) and researchers long for the simulator of microchip. So, we are trying to develop a micro fluid simulator using. MPS method (Moving Particle Semi-implicit method). MPS is a kind of particle method and we consider it is good method for simulation of fluid because it does not need grid and we can easily deal with strong deformations. In this article, we provide a simulation of micro flow in a transforming channel using MPS.

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CIP can calculate the advection equation with less numerical diffusion even for advection of step function. In this paper, we'll suggest new calculation technique of the surface tension taking advantage of this merit. In this technique, first we make smoothed density function.by using diffusion equation, and use this function to calculate curvature to get correct curvature. Appling this technique to bubble vibration, we examine the accuracy.

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A higher-order AMR method has been developed on the basis of high accurate numerical scheme IDO (Interpolated Differential Operator). The IDO scheme uses high-order compact interpolation suitable for AMR implementation. The advection test shows that IDO-AMR scheme has third-order accuracy. For two-dimensional multi-mode Rayliegh-Taylor instability, it is found that the mixing interface can be described sharply by refining the mesh there.

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CIP・CCUP法の解析ソフトウェアPARCIPHALを用いて毛細管現象を解析・した作業内容及び結果報告を行なう。CIP法やCCUP法についての詳しい説明は他の文献入任せるごとにする。基本概念を理解するには、森北出版株式会社より出版されている「CIP法原子から宇宙までを解くマルチスケール解法矢部孝、内海隆行、尾形陽一共著」を参照されたい。

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In this paper, the practical method to estimate the stress concentration factor (SCF) of two dimensional surface complex roughness is proposed. In the present method, the surface roughness is approximated with an infinite row of colinear notches which con-sists on "the local configuration" and "the average configuration". The SCF values of the notches are calculated independently, and the SCF of the surface roughness is obtained by the superposition of each SCF values. The problems of colinear row of arbi-trary notches and.complex surface are solved by the present method and Finite Element Method (FEM). Comparing the present solution with FEM solution, the validity of the present method is examined.

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A computational model employing the finite element method was developed to predict temperature and degree of cure variations in tri-axial carbon fiber reinforced three-dimensional composites during cure. The model can be used to minimize the time needed for efficient cure and helps avoid such process errors as undercure or degradation.

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Creep deformation of the short fiber composite with thermoplastic matrix is considered in this study. The composite is modeled as periodical array of short fibers in the microstructure. The thermoplastic matrix has time-temperature dependent properties. Effect of damage between fiber and matrix on the creep property of fiber composites is studied. The interface between fiber and matrix slips from end of fiber during loading. It may cause nonlinear behavior of composites. The nonlinearity is discussed using a homogenization theory with two-scale asymptotic expansion to evaluate viscoelastic properties of composites. Effective constitutive relation and microscopic disturbed displacements are derived from the homogenization theory.

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In this paper, the mechanical behavior of short fiber reinforced polymer (SFRP) composite materials in temperature and moisture conditions is investigated. By using a unit cell model for microstructure of SFRP composites, a homogenization theory with multi-scale asymptotic expansion is adopted to examine the macro- and microscopic behavior of the composites in the environmental conditions theoretically. In order to clarify the effects of temperature and moisture conditions on the mechanical behavior of SFRP composites and the microfractures, some numerical calculations are performed for stress-strain relationship and the residual stresses induced in various environmental conditions, and fabrication of the composites is also discussed from the comparison with experimentalresults and theoretical ones.

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