摘要
表面形貌与表面自由能的关系对揭示玻璃纤维增强树脂基复合材料(GFRP)胶接修理的粘附力理论具有重要意义,通过改变打磨目数,生成不同形貌的GFRP表面,并通过激光共聚焦测量获得表面轮廓线,以测量的接触角间接计算不同表面的表面自由能;然后采用夹角-弦高准则对表面轮廓线进行特征保持的简化,同时获得度量轮廓特征的轮廓线特征点数量、弦高分布曲线和夹角分布曲线,并分析其与表面自由能的关系。结果表明,轮廓线的特征点数量越多、弦高和夹角分布曲线的差异值越大,对应表面的表面自由能越大,轮廓特征有效支持了基于机械嵌锁的粘附力理论。
The relationship between surface topography and surface free energy is very important to reveal the fundamental mechanisms that govern adhesion for bonding repair of glass fibre reinforced resin matrix composites.The surfaces were created by sanding that used different items of sandpaper.The topography of the surfaces was measured using laser confocal and the contours were generated.The surface free energy was computed by measured contact angles.Feature-preserving contour filtering was carried out based on chord and angle-deviation criterion.The contour feature consisted of contour feature points,chord height distribution curve and angle-deviation distribution curve was acquired simultaneously.The relationship between contour features and surface free energy was analyzed.The results show that the contour has larger numbers of feature points,greater differences between the chord and angle-deviation distribution curve,and the corresponding surface energy will be larger which effectively supports the adhesion theory based on mechanical interlocking.
作者
贺强
杨文锋
杨晓强
HE Qiang;YANG Wen-feng;YANG Xiao-qiang(Aviation Engineering Institute,Civil Aviation Flight University of China,Guanghan 618307,China)
出处
《复合材料科学与工程》
CAS
北大核心
2020年第12期5-9,25,共6页
Composites Science and Engineering
基金
国家自然科学基金(NSFC)
民航联合基金重点项目(U1233202)
四川省科技厅军民融合重点研发项目(2018GZ0497)。
关键词
表面自由能
轮廓特征
表面形貌
粘附力
复合材料
surface free energy
contour features
surface topography
adhesion
composite materials
