酚醛面板蜂窝夹层结构的面-芯界面优化及其对弯曲和剪切性能的影响

为了提高安全性和经济效益,酚醛面板蜂窝夹层结构在内饰领域的应用越来越广泛.但是在共固化工艺中,面板用酚醛预浸料和环氧胶膜存在相容性问题,易产生弱界面.本文通过调整胶膜的单位面积质量(面重)实现了面-芯界面的优化,结果表明,滚筒剥离强度随环氧胶膜面重的增大先提高后下降.基于夹层结构四点弯曲和平板剪切试验的载荷位移曲线以及...

Optimization of The Skin-Core Interface of Honeycomb Sandwich Structure with Phenolic Panels and Its Effect on Bending and Shear Properties

For purpose of safety and economic benefit,honeycomb sandwich structure with phenolic panel is widely used in the field of interior decoration.However,in the co-curing process,the compatibility between phenolic prepreg and epoxy film tends to produce weak interface.In this paper,the skin-core interface was optimized by adjusting the area weight of epoxy film.The results show that the drum peeling strength increases first and then decreases with the increase of area weight of epoxy film.In addition,based on the damage morphology and load-displacement curves of four-point bending and panel shear test,effects of the skin-core interface on bending and shear properties were analyzed.The results show that after optimization of the skin-core interface,the ultimate bending load and ultimate shear load have been improved by about 13% and 9% respectively.