关键词: 自动铺丝, 黏性, 剥离试验, 铺放工艺参数, 老化时间, 复合材料

Abstract: Automated fiber placement is an advanced low-cost and automatic manufacturing process for composite materials. It is usually used to manufacture aircraft fuselage, S-shaped inlet and other composite components with large curvature. During the layup process, the tack of prepreg shows a great influence on the final quality of the products. The tack of prepreg should not be too low to ensure the smooth adhesion between adjacent tows. Meanwhile, the tack of prepreg should also not be too high in order to enable convenient modification in case of failure of layup. The existing evaluation methods of prepreg tack are mainly 90 degree peel test and 180 degree peel test, which mainly aims at wider tapes in automated tape placement. Preliminary experiments show that the experimental data will fluctuate greatly when the standard single tow peel test is utilized, which could not meet the relevant detection requirements. In view of this, this paper establishes the detection criteria of prepreg tack, and multi tow 180 degree peel test is proposed to detect the prepreg tack. Based on the criteria, the influence of layup pressure, layup speed, layup temperature and aging time on the tow tack is investigated through a series of experiments.

Key words: automated fiber placement, tack, peel test, layup process parameters, aging time, composites