射出成形複合材の板厚方向の繊維配向不均質性を考慮した成形-構造連成解析手法の検討

Abstract

In the crash of automobiles, main behavior is bending deformation. Because of this, it is important to accuracy of calculate edge stress and allowable stress on surface of structure. For that purpose, it is necessary to consider the distribution of the fiber orientation angle and degree in the plate thickness direction. In a general coupled analysis for injection molding materials, a material model is created based on the physical properties obtained from an arbitrary test piece. Therefore, even if the orientation angle in each part to be analyzed is taken into consideration, the degree of orientation is constant in each part, and the degree of orientation distribution in the plate thickness direction is also treated as constant. We tried to improve the accuracy of crash analysis by calculating the edge stress and allowable stress with high accuracy by considering the distribution of orientation angle and degree in the plate thickness direction. For that purpose, we created a model that calculating properties of composite materials from resin and fiber properties, and the process that mapping the distribution of orientation angle and degree in the plate thickness direction to each integration point of the shell element on structural analysis from molding analysis.