纤维增强聚合物注塑件力学性能耦合数值分析

Coupled Numerical Analysis for Mechanical Properties of Fiber Reinforced Polymer Injection Molding Parts

基于聚合物复合材料的各向异性机理,建立了纤维增强聚合物注塑件各向异性力学模型,以标准拉伸试样为研究对象,通过网格映射法集成Moldflow和Abaqus,实现纤维增强聚合物复合材料注塑流动和结构分析的耦合。结合塑件纤维取向和残余应力,分析浇口位置及数量对塑件力学性能的影响,结果表明,在给定塑件及载荷条件下,边浇口变形最小,中心浇口次之,两浇口变形最大。以上结果对提升塑件结构分析的精度具有重要意义。

Based on the anisotropy mechanism of polymer composite materials,the anisotropic mechanical model of fiber reinforced polymer injection molding parts were established. Moldflow and Abaqus were integrated together by using mesh mapping method to couple injection molding flow and structural analysis. The influence of gate location and quantity on part mecharical properrties was discussed combining with tiber orientation and residual stress of standard tensile specimens. The results showed that under the given parts and load conditions,the deformation was minimum on side gate, the next on central gate, and the maximum on double gates. The above results had great importance to improve the accuracy of structural analysis of injection molding parts.