真空热循环对碳/双马来酰亚胺复合材料低速冲击性能的影响  

Effects of vacuum thermal cycle on low velocityimpact properties of carbon fiber/BMIcomposites

作　　者：高禹 刘京 王进[2] 王柏臣 崔旭 包建文 GAO Yu;LIU Jing;WANG Jin;WANG Bai-chen;CUI Xu;BAO Jian-wen(School of Materials Science and Engineering,ShenyangAerospace University,Shenyang 110136,China;ShenyangAircraft Design&Research Institute,Shenyang 110035,China;National Key Laboratory of AdvancedComposites,Beijing 100095,China)

机构地区：[1]沈阳航空航天大学材料科学与工程学院,沈阳110136 [2]沈阳飞机设计研究所,沈阳110035 [3]先进复合材料国防科技重点实验室,北京100095

出　　处：《材料工程》2020年第7期154-161,共8页Journal of Materials Engineering

基　　金：国家自然科学基金(51373102);辽宁省高等学校国(境)外培养基金(2018LNGXGJWPY-YB008)。

摘　　要：对T700/HT280复合材料进行真空热循环处理(-140~180℃,10-3 Pa),分别测试真空热循环处理前后复合材料的质损率、动态力学性能和低速冲击性能。采用宏观目视、超声C扫描和有限元分析对低速冲击损伤状况进行分析、表征和模拟。结果表明,随真空热循环次数的增加,由于发生析气效应,T700/HT280复合材料及基体树脂的质损率先急剧升高然后趋于平缓。经历真空热循环处理后T700/HT280复合材料出现了一定程度的后固化、热老化和局部界面脱粘。低冲击能时主要损伤模式为基体树脂受到压缩,高冲击能时主要损伤模式转化为基体开裂、复合材料分层。有限元模拟结果与实验结果吻合。随冲击能量的增大,复合材料吸收能增加。冲击能量为30~40 J条件下,吸收能可以有效地表征出真空热循环对复合材料的环境损伤效应。The T700/HT280 composites were subjected to vacuum thermal cycling(-140-180℃,10-3 Pa).The mass loss rate,dynamic mechanical properties and low-speed impact of composites were tested before and after vacuum thermal cycling respectively.The visual observation,ultrasonic C-scan and finite element(FE)analysis were used to analyze,characterize and simulate the low-speed impact damage.The results show that the mass loss rates of T700/HT280 composites and matrix resin are increased rapidly and then level off with the increase of the number of vacuum thermal cycles,which is due to the gassing effect.After the vacuum thermal cycle treatment,T700/HT280 composites show some degree of post-cure,thermal aging and partial interface debonding.The main damage mode at low impact energy is that the matrix resin is compressed.However,matrix cracking and delamination are deemed as the damage mode at high impact energy.The FE simulation results are consistent with the experimental results.As the impact energy increases,the absorption energy of the composites is increased.Under the condition of 30-40 J impact energy,the absorption energy can effectively characterize the environmental damage effects of vacuum thermal cycle on composites.

关 键 词：碳/树脂基复合材料 真空热循环 低速冲击性能 动态力学热分析(DMA) 有限元模拟 超声C扫描 

分 类 号：TB332[一般工业技术—材料科学与工程]