단섬유 복합소재 사출 성형품의 기계적 거동 예측을 위한 2D Shell 기반 사출 성형-구조 연계 해석

초록

This study proposes a 2D Shell-based injection molding–structural coupled analysis for efficiently predicting the structural behavior of injection-molded short-fiber reinforced composite structures. To this end, local short-fiber orientation during the manufacturing process were derived based on injection molding analysis, and the corresponding behaviors were considered in the process of the structural analysis. Furthermore, by applying a layered 2D Shell model, the 3D distribution of the local short-fiber orientation was approximately mapped onto the layer-wise orientation data of 2D Shell elements, enabling the in-plane and through-thickness distributions of orthotropic material properties to be efficiently considered within a dimension-reduced analysis model. As numerical examples, injection molding-structural coupled analysis was performed for tensile and bending specimens. The accuracy and computational efficiency of the proposed analysis model were verified by comparing obtained results with those of 3D Solid-based injection molding–structural coupled analysis.

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