注塑成型FRP的力学性能预测的数值模拟

Numerical Simulation of Mechanics Property For Mold Injection FRP

纤维增强复合材料的力学性能和热物理性能强烈地依赖于纤维的取向状态 ,在注射成型过程中 ,纤维最终的取向状态依赖于充填过程的速度场 ,因此最终的产品性质依赖于成型的详细过程。研究发现 ,注塑成型制品的结构呈层状分布 ,层的数目依赖于模具几何和成型条件 ,不过大多数的结构在成型表面为沿流动方向取向 ,而在中心层为横向排列 ,有时在制件表面还有一层薄的介于二者之间排列的取向层。本文主要给出在两个简单模型中的纤维取向预测的理论和数值方法 ,这两个模型分别为 :中心浇口圆盘和边浇口长条。

The mechanics and thermal physical property of FRP mainly depends on the fiber orientation.In the process of the mold injection, the final orientation of the fiber depends on the velocity field of the filtration and the property of the final product depends on the molding process. The research shows that the product structure of the mold injection appears laminated and the lamination number depends on the mold shape and molding condition. The orientation of most structure on the molding surface is along flow direction. The orientation in the central lamination appears cross arrangement. Sometimes the orientation of the thin orientation layer on the surface is between the two ones mentioned above. This paper presents the theoretical and numerical method of the fiber orientation in two simple mold. The two molds are circle plate mold poured in the center part and long block mold poured in the side part.