湿热老化后碳纤维复合材料层间剪切强度实验方法对比研究
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摘要
通过短梁法和双切口法研究湿热老化对T700/TDE-85复合材料层间剪切强度的影响,讨论两者吸湿规律随老化时间的变化关系,并对试件断口形貌进行分析。结果表明:两种试件吸湿规律均符合Fick第二定律,但两者平衡吸湿率和吸湿时间有所差别,双切口法试件的吸湿速率和平衡吸湿率均比短梁法试件高;双切口试件所测层间剪切强度受湿热老化影响比短梁明显,短梁试件每隔500 h层间剪切强度保持率为74.5%,61.0%,53.2%,50.6%,双切口每隔500 h层间剪切强度保持率为60.9%,38.3%,42.6%,33.0%;短梁试件失效模式随着湿热老化时间的增长变化比双切口更为复杂。
The effects of hygrothermal aging on the interlaminar shear strength of T700/TDE-85 composites were studied by shortbeam method and double-incision method. The relationship between moisture absorption and aging time was discussed,and the fracture surface morphology was analyzed. The experimental results show that the moisture absorption law of the two specimens is in accordance with Fickle's second law,but the saturated moisture absorption rate and moisture absorption time are different. The moisture absorption rates and saturated moisture absorption rates of the specimens of double incision method are higher than those of the short beam method.The interlaminar strength of double-incision test is more obvious than that of short-beam under hygrothermal aging conditions,the interlaminar shear strength retention rates of short-beam method's specimens are 74.5%,61.0%,53.2% and 50.6% at 500 h intervals and the interlaminar shear strength retention rates of double-incision method's specimens are 60.9%,38.3%,42.6% and 33.0% at 500 h intervals. The failure mode of short-beam specimen is more complicated than that of double-incision with the increase of hygrothermal aging time.
The effects of hygrothermal aging on the interlaminar shear strength of T700/TDE-85 composites were studied by shortbeam method and double-incision method. The relationship between moisture absorption and aging time was discussed,and the fracture surface morphology was analyzed. The experimental results show that the moisture absorption law of the two specimens is in accordance with Fickle's second law,but the saturated moisture absorption rate and moisture absorption time are different. The moisture absorption rates and saturated moisture absorption rates of the specimens of double incision method are higher than those of the short beam method.The interlaminar strength of double-incision test is more obvious than that of short-beam under hygrothermal aging conditions,the interlaminar shear strength retention rates of short-beam method's specimens are 74.5%,61.0%,53.2% and 50.6% at 500 h intervals and the interlaminar shear strength retention rates of double-incision method's specimens are 60.9%,38.3%,42.6% and 33.0% at 500 h intervals. The failure mode of short-beam specimen is more complicated than that of double-incision with the increase of hygrothermal aging time.
引文
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[15]裴晓园,尚博,李嘉禄,等.多层连接碳纤维纬编双轴向衬纱织物增强复合材料的层间剪切性能[J].材料研究学报,2015,29(8):613-621.(PEI X Y,SHANG B,LI J L,et al.Shear properties of resin composites reinforced with multilayer-connected biaxial weft knitted fabric of carbon fibers[J].Chinese Journal of Materials Research,2015,29(8):613-621.)
[16]高艺航,石玉红,王鲲鹏,等.碳纤维增强聚酰亚胺树脂基复合材料MT300/KH420高温力学性能(I)-拉伸和层间剪切性能[J].复合材料学报,2016,33(6):1206-1213.(GAO Y H,SHI Y H,WANG K P,et al.High-temperature mechanical properties of carbon fiber reinforced polyimide resin matrix composites MT300/KH420(I)-tensile and interlaminar shear properties[J].Acta Materiae Compositae Sinica,2016,33(6):1206-1213.)
[17]曹东,张晓云,陆峰,等先进复合材料T300/5405综合环境实验谱的研究[J].材料工程,2014(7):73-78.(CAO D,ZHANG X Y,LU F,et al.Synthetical environmental spectrum aging of T300/5405 advanced composite material[J].Journal of Materials Engineering,2014(7):73-78.)
[18]罗云烽,李阳,肈研,等.国产T800级炭纤维表面特性及其复合材料微观界面性能[J].材料工程,2014(9):83-88.(LUO Y F,LI Y,ZHAO Y,et al.Surface characteristics of domestic T800 grade carbon fibers and microscopic interphase properties of composites[J].Journal of Materials Engineering,2014(9):83-88.)
[2]谢可勇,李晖,孙岩,等.湿热老化对纤维增强树脂基复合材料性能的影响及其机理[J].机械工程材料,2014,38(8):1-5.(XIE K Y,LI H,SUN Y,et al.Effect of hygrothermal aging on behaviors of fiber reinforced resin composites and its mechanism[J].Materials for Mechanical Engineering,2014,38(8):1-5.)
[3]纪朝辉,刘阔,白云,等.飞机结构复合材料循环加速老化的研究[J].中国民航大学学报,2014,32(2):36-39.(JI Z H,LIU K,BAI Y,et al.Study on composite of aircraft structures under accelerated aging conditions[J].Journal of Civil Aviation University of China,2014,32(2):36-39.)
[4]李晓骏,陈新文.复合材料加速老化条件下的力学性能研究[J].航空材料学报,2003,23(增刊1):286-286.(LI X J,CHEN X W.Study on composites mechanical properties under accelerated aging conditions[J].Journal of Aeronautical Materials,2003,23(Suppl 1):286-286.)
[5]KRISHNA R,REVATHI A,SRIHARI S,et al.Post-curing effects on hygrothermal behavior of rt-cured glass/epoxy composites[J].Journal of Reinforced Plastics&Composites,2010,29(3):325-330.
[6]YU Y,LI P,SUI G,et al.Effects of hygrothermal aging on the thermal-mechanical properties of vinylester resin and its pultruded carbon fiber composites[J].Polymer Composites,2009,30(10):1458-1464.
[7]ARICI A A.Effect of hygrothermal aging on polyetherimide composites[J].Journal of Reinforced Plastics&Composites,2007,26(18):1937-1942.
[8]KUMAR S B,SRIDHAR I,SIVASHANKER S.Influence of humid environment on the performance of high strength structural carbon fiber composites[J].Materials Science&Engineering:A,2008,498(1/2):174-178.
[9]高禹,代小杰,卢少微,等.湿热老化对T700/3234复合材料力学性能影响研究[J].航空制造技术,2013,424(4):65-68.(GAO Y,DAI X J,LU S W,et al.Study on hydrothermal aging effect on mechanical properties of T700/3234 composites[J].Aeronautical Manufacturing Technology,2013,424(4):65-68.)
[10]李玉玲,万里强,黄发荣,等.碳纤维/聚三唑树脂复合材料的湿热老化行为[J].玻璃钢/复合材料,2014,16(11):36-41.(LI Y L,WAN L Q,HUANG F R,et al.The hygrothermal aging behavior of carbon fiber reinforced polytriazole rein composites[J].Fiber Reinforced Plastics/Composites,2014,16(11):36-41.)
[11]BOTELHO E C,PARDINI L C,REZENDE M C.Hygrothermal effects on the shear properties of carbon fiber/epoxy composites[J].Journal of Materials Science,2006,41(41):7111-7118.
[12]过梅丽,肇研,谢令.航空航天结构复合材料湿热老化机理的研究[J].宇航材料工艺,2002,32(4):51-54.(GUO M L,ZHAO Y,XIE L.Study on hygrothermal aging mechanisms of aerospace structural composites[J].Aerospace Materials&Technology,2002,32(4):51-54.)
[13]HUTAPEA P,YUAN F G.The effect of thermal aging on the Mode-I interlaminar fracture behavior of a high-temperature IM7/LaRC-RP46 composite[J].Composites Science&Technology.1999,59(8):1271-1286.
[14]李松梅,李湘澄,辛长胜,等.循环加速腐蚀中紫外照射对环氧涂层老化行为的影响[J].材料工程,2014(7):60-66.(LI S M,LI X D,XIN C S,et al.Synergistic accelerated corrosion of ultraviolet irradiation on epoxy coating aging behavior[J].Journal of Materials Engineering,2014(7):60-66.)
[15]裴晓园,尚博,李嘉禄,等.多层连接碳纤维纬编双轴向衬纱织物增强复合材料的层间剪切性能[J].材料研究学报,2015,29(8):613-621.(PEI X Y,SHANG B,LI J L,et al.Shear properties of resin composites reinforced with multilayer-connected biaxial weft knitted fabric of carbon fibers[J].Chinese Journal of Materials Research,2015,29(8):613-621.)
[16]高艺航,石玉红,王鲲鹏,等.碳纤维增强聚酰亚胺树脂基复合材料MT300/KH420高温力学性能(I)-拉伸和层间剪切性能[J].复合材料学报,2016,33(6):1206-1213.(GAO Y H,SHI Y H,WANG K P,et al.High-temperature mechanical properties of carbon fiber reinforced polyimide resin matrix composites MT300/KH420(I)-tensile and interlaminar shear properties[J].Acta Materiae Compositae Sinica,2016,33(6):1206-1213.)
[17]曹东,张晓云,陆峰,等先进复合材料T300/5405综合环境实验谱的研究[J].材料工程,2014(7):73-78.(CAO D,ZHANG X Y,LU F,et al.Synthetical environmental spectrum aging of T300/5405 advanced composite material[J].Journal of Materials Engineering,2014(7):73-78.)
[18]罗云烽,李阳,肈研,等.国产T800级炭纤维表面特性及其复合材料微观界面性能[J].材料工程,2014(9):83-88.(LUO Y F,LI Y,ZHAO Y,et al.Surface characteristics of domestic T800 grade carbon fibers and microscopic interphase properties of composites[J].Journal of Materials Engineering,2014(9):83-88.)