Mechanical Properties of Carbon Epoxy Prepreg Insert Phenolic Resin Injection Moldings

This study focuses on the insert-injection molding process. The thermoset composite inserts in this study were carbon fiber/epoxy (CF/Epoxy) prepreg sheets. The injected molded part was glass fiber contained phenolic resin (GF/PF). The CF/Epoxy was placed in the mold cavity prior to injecting GF/PF onto the inserted injection molded CF/Epoxy specimens. The role of adhesion between the inserted part and injected resin on the mechanical properties was evaluated by 3 point bending and impact tests. In addition, the effect of prepreg orientation on the mechanical properties of the prepreg inserted-injection molding system was investigated. It was found that the prepreg with unidirectional orientation significantly improved flexural and impact strength of the inserted injection molding composites, providing better support and resistance to bending and impact loading. The main failure modes of the specimens were structural and adhesive failure.

影响蜂窝夹层结构滚筒剥离强度主要因素的研究

对预浸料与蜂窝直接接触共固化成形的蜂窝夹层结构的滚筒剥离强度进行了研究，主要讨论了树脂基体、预浸料树脂含量及织物构成对滚筒剥离强度的影响。

薄层碳纤维织物预浸料的制备与性能

通过超声波扩展技术将T700-12K碳纤维扩展成20mm宽,然后利用全自动编织机编织成平纹布,最后采用后浸渍法中的胶膜法制备高性能YPH-69/T700和SZ-125/T700的织物预浸料。预浸料的单位面积纤维质量为(80±3)g/m^2,单层固化厚度为(0.080±0.015)mm。通过模压工艺制备层合板测试力学性能,结果表明:利用SZ-125树脂制备的层合板比用YPH-69树脂制备的层合板力学性能好,与树脂的性能密切相关。同时用abaqus软件建立有限元模型,研究在拉伸、压缩载荷下复合材料层合板的应力分布,模拟结果与实验过程中断裂位置相符。