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Large scale visualization issues: large data can not fit in memory, can not be loaded within reasonable time, and can not be displayed on display with enough resolution, are observed now. In this paper, large scale visualization functions implemented on AVS/Express are described. The user examples and future development plans are also discussed

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To visualize the results of parallel computation on a super-large scale of a few to a few tens of thousands of parallel processes, processing in which bulky computation result data are rendered at high speeds is required. The conventional method of transferring computation result data to a visualization server may give rise to many challenges that are difficult to meet such as reassembly and transfer of extensive amounts of computation result files. This paper presents technologies for solving these challenges to visualize super large scale computations performed by the K computer and the results of applying those technologies.

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[in Japanese]

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[in Japanese]

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[in Japanese]

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[in Japanese]

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[in Japanese]

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[in Japanese]

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[in Japanese]

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Running the railway vehicle, the deterioration on the rail or wheel, such as wear or crack can be caused, by the slip along with vibration and impact on the contact patch between rail and wheel. High frequency load response of the order of kHz is considered one of the causes on these phenomena. Therefore, it is necessary that the mechanical behaviors occur on the contact patch estimate with accuracy. In this study, three-dimensional finite element analysis considering rolling contact by large-scale parallel computation is conducted to solve the deterioration mechanism between rail and wheel. As high-speed calculation on the large-scale fine model can be performed by HPC, it is considered that the dynamic response of the real phenomena is evaluated exactly.

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Electronic state calculations provide us important information about materials and devices. For silicon oxidation, details of atomic transport, such as diffusion/reaction path and barrier height, can be clarified. For diamond/metal interface, details of Schottky barrier height control mechanism, such as potential variation and electron redistribution, can be clarified. For silicon nanoslab, details of modification of the optical dielectric constant, such as the relation between the band gap and the optical dielectric constant, can be clarified. For graphene on SiC, details of physical properties and formation mechanism, such as growth path and electronic properties, can be clarified. Recent aggressive progress in calculation size might lead us to treat more realistic and more complex materials/devices as well as to obtain more fruitful information for the research.

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[in Japanese]

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[in Japanese]

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[in Japanese]

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[in Japanese]

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It is well known that thermal fatigue easily occurs in the solder joints of inverter circuit board. In this study, we tried to evaluate thermal fatigue life of solder joints with the stress singularity parameters near the solder joint edges. Firstly, we made constitutive equations of the solder materials and confirmed its precision. Next, using FEM analyses, we calculated stress singularity parameters near the solder joint edges for power modules under the conditions of thermal cycle experiments and power cycle experiments. Finally, we made evaluation equations of thermal fatigue life for solder joints by connecting stress singularity parameters and experiment results with fatigue laws.

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[in Japanese]

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[in Japanese]

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[in Japanese]

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We developed an automatic mesh generation system (FORTUNA) by using the Feature Recognition Technology, Mesh Flow Control Technology and Mesh Generation Technology. FORTUNA automatically generates high quality mesh meeting the automotive industry mesh specifications for crash simulation. FORTUNA will cut down enormous time spent on modeling operations. FORTUNA can read and save files in any file formats that HyperMesh or ANSA support since HyperMesh or ANSA works in the background of FORTUNA.

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[in Japanese]

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