繊維強化樹脂の伝熱解析を用いた流動方向予測と構造解析との連成(<小特集>第18回設計工学・システム部門講演会)

概要

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Recently, the number of products made from fiber-reinforced plastics (FRP) has been increasing due to their low cost, high rigidity, and high strength. Generally, injection molded FRP parts are known to be anisotropic, i.e. mechanical properties are different in the flow and transverse directions. Therefore, it is important to consider the flow direction during structural analysis and design for FRP products. In this study, a new method for structural analysis with consideration of flow direction is proposed. In this method, the flow analysis component was substituted with thermal analysis, whereby the flow direction was simply predicted on the basis of the direction of heat flux. Furthermore, it is easier to couple the thermal and structural analysis components and incorporate them into conventional software for structural analysis. In order to verify the prediction of flow direction by means of thermal analysis, fiber orientation was observed by X-ray CT. Verification was also conducted by performing static and modal analysis for a propeller fan. It was confirmed by means of fiber orientation observation that the heat flux direction was comparable to the resin flow direction. The results from both static and modal analysis with consideration of flow direction also agreed well with that of the actual product.
2009-08-25