313 アルミニウム合金ダイカストの引け巣クラスターまわりの応力評価(アルミニウム合金およびマグネシウム合金の創製と加工(1),ものづくりにおける基礎研究と先端技術の融合)

概要

論文の詳細を見る
The mechanical properties of the clustered shrinkage pores in high-pressure die cast aluminum alloy ADC 12 were evaluated through the serial sectioning experiment and the image-based finite element analyses. We have investigated the effect of pores on the fatigue strength, and found a mechanical significance of the clustered shrinkage pores, which considerably undermines the strength of die cast aluminum alloys. In this study, we constructed twenty three unit cell models for the homogenization analysis based on the three-dimensional image of a clustered shrinkage pore. From the homogenization analysis and uniaxial extension analysis, we obtained the equivalent elastic constants and the micro stress concentration factor as a function with respect to the porosity volume fraction.
2010-11-27