Paper number 387


Jeong Ho Kim1, Hea Jin Yeo2 and Seung Jo Kim2

1ETRI Supercomputing Center
52 Eoeun-Dong, Yusong-Ku, Taejon 305-333, Korea
2Department of Aerospace Engineering, Seoul National University
San 56-1, Shillim-Dong, Kwanak-Ku, Seoul 151-742, Korea

Summary Composite materials consist of two or more constituents bonded together. Thus, to understand and predict not the averaged or homogenized behavior but the real behavior of composite structures, full microscopic modeling that can describe the behavior of each constituent is required. Analysis of full microscopic models of composite structures, what we will call Direct Numerical Simulation (DNS) of composite materials, requires huge computing resources. In this work, an efficient parallel direct solver, which can utilized distributed computing resources unlimitedly, is developed as a powerful analysis tool for DNS by using the multifrontal technique. And it is shown that DNS of composite structures is feasible by virtue of the high performance parallel multifrontal solver. DNS of composite materials is performed for some example problems up to about 1.4 million unknows and the usefulness and the feasibility of DNS is verified.
Keywords fiber-reinforced composites, microstructure, finite element method, direct numerical simulation (DNS), multifrontal solver, parallel computing.

Theme : Mechanical and Physical Properties ; Simulation

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