【作者】 李野； 郭稳学； 李贵文； 郑锡涛； 盛国柱； 肖娟；

【Author】 Li Ye Guo Wenxue Li Guiwen Zheng Xitao Sheng Guozhu Xiao Juan ( Aircraft Strength Research Institute of China, Xi’an, 710065; Shenyang Aircraft Design Research Institute, Shenyang, 110035)

【机构】 中国飞机强度研究所； 沈阳飞机设计研究所；

【摘要】 本文试验研究了国产复合材料缝合结构的吸湿特性、基本力学性能及湿热效应,层板缝合后的吸湿量大约提高30%左右,弯曲强度下降20%左右,层间剪切强度提高大约20%;吸湿对缝合结构的性能影响不大,仅对压缩强度有15%左右的影响;高温严重影响缝合及未缝合结构的性能,特别是压缩性能对缝合层板的影响大于未缝合层板,在170℃高温下,未缝合层板压缩强度保持率为17.8%,而缝合层板仅为14.6%,设计高温环境使用的缝合结构应特别注意。研究结果可供结构设计参考。更多还原

【Abstract】 In this experimental study, moisture absorption behavior, basic mechanical properties and hygrothermal effects of stitched and unstitched laminates were investigated. Moisture content of stitched composite is increased about 30 % , bending strength is decreased about 20 % , but interlaminar shear strength is increased about 20 % . Stitched laminates strength after moisture uptake may not drop so noticeably hut such properties as compression and intralaminar/inter-laminar shear strength are significantly affected by the absorbed moisture, especially at high temperature. Compression strength of stitched composite in 1.45% moisture content is dropped 15 % . At 170℃, survivability of compression strength of unstitched and stitched laminates are 17.8% and 14.6% , respectively. This should be concerned during stitched structures are designed. The results may be referenced in structural design.更多还原