Effect of horizontal shift between fabric layers on the meso-scale-void formation in liquid composite molding

eXPRESS Polymer Letters

B. Yang¹ 

关键词: polymer composites;    liquid composite molding;    void formation;    modeling and simulation;   

DOI  :  10.3144/expresspolymlett.2019.42

学科分类：生物科学（综合）

来源: eXPRESS Polymer Letters

【 摘 要 】

Accurate prediction of void content is the foundation of process optimization for Liquid Composite Molding(LCM). During mold filling, void formation is a three-dimensional flow process, while at present the void formation istreated as a result of in-plane air entrapment, the resin and air flows on the thickness direction are totally neglected. In thispaper, resin flows in the adjacent layers are considered to analyze the three-dimensional air entrapment and the meso-scalevoidformation. Firstly, the horizontal shift between fabric layers is analyzed, the mesopore coverage modes under differentshift states are summarized. Then based on the mathematical models of micro and meso flows, the three-dimensional voidentrapment processes under different cladding flow modes are studied in detail, a mathematical model for the prediction ofmeso-scale-void formation is established. Finally, a series of mold filling and void measurement experiments are carriedout to verify the above model.

【 授权许可】

CC BY