缝合复合材料层板Ⅰ型层间开裂性能研究  

Study on property of the modeⅠdelamination for stitched composite laminates

作　　者：张东哲 李祚军 ZHANG Dongzhe;LI Zuojun(AECC Sichuan Gas Turbine Establishment,Chengdu 610500,China)

机构地区：[1]中国航发四川燃气涡轮研究院,成都610500

出　　处：《复合材料科学与工程》2023年第8期44-50,共7页Composites Science and Engineering

摘　　要：由于传统复合材料层板层间强度低,缝合技术被广泛应用以改善其层间性能。为了研究缝合复合材料层板Ⅰ型层间开裂性能,采用双悬臂梁(Double Cantilever Beam,DCB)模型计算了缝合复合材料Ⅰ型层间失效载荷,并讨论了不同缝线密度及缝线直径的影响。结果表明:缝线对分层扩展具有阻碍作用,缝合模型的分层前缘为波浪线,而未缝合模型的分层前缘为直线;缝线密度的增加会提高模型层间失效载荷,相比于未缝合模型,缝合密度分别为10 mm×10 mm、7.5 mm×7.5 mm、5 mm×5 mm、2.5 mm×2.5 mm的模型的层间失效载荷依次大约提高了7倍、9倍、10倍、15倍;缝线直径的增大同样会提高模型层间失效载荷,缝线直径为1000 D、2000 D的模型的最大层间失效载荷分别约是缝线直径为500 D的模型的1.5倍、2倍。Due to the low interlaminar strength of traditional composite laminates,stitching technology has been widely used to improve their interlaminar properties.In order to study the modeⅠdelamination performance of the stitched composite laminates,the double cantilever beam(DCB)model was used to calculate the modeⅠdelami⁃nation failure load.Then the effects of different stitch density and diameter for the interlaminar failure load of the composite laminates were discussed.The result show that the stitching technology can hinder the delamination propa⁃gation for the composite laminates model.The delamination front in the stitched composite laminates model is a wavy line,while the delamination front of the unstitched composite laminates model is a straight line.The increase of stitch density will improve the interlaminar failure load of the composite laminates model.Compared with the un⁃stitched composite laminates model,the interlaminar failure load of the model with stitch density of 10 mm×10 mm,7.5 mm×7.5 mm,5 mm×5 mm and 2.5 mm×2.5 mm increases by about 7 times,9 times,10 times and 15 times,respectively.The increase of the stitch diameter will also improve the interlaminar failure load of the composite lami⁃nates model.The maximum interlaminar failure load of the model with the stitch diameter of 1000 Dan and 2000 Dan is about 1.5 times and 2 times that of the model with the stitch diameter of 500 Dan,respectively.

关 键 词：缝合 复合材料 层间性能 黏聚力模型 

分 类 号：TB332[一般工业技术—材料科学与工程]