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

发布时间：2018-03-29 07:28

本文选题：湿热老化　切入点：复合材料　出处：《航空材料学报》2017年05期

【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。
[Abstract]:The effect of wet-heat aging on interlaminar shear strength of T700/TDE-85 composites was studied by short beam method and double notch method. The relationship between the moisture absorption and aging time was discussed. The fracture morphology of the specimens was analyzed. The results showed that the moisture absorption law of the two specimens was in accordance with the second law of Fick, but the equilibrium moisture absorption rate and the moisture absorption time were different between the two kinds of specimens. The moisture absorption rate and equilibrium moisture absorption rate of double notch specimens are higher than those of short beam specimens, and the interlaminar shear strength measured by double notch specimens is more affected by hygrothermal aging than that of short beams. The shear strength retention rate between layers of short beam specimens is 74.51.0and 53.20.60.The shear strength retention rate is 60.938.3and 42.63.0.The failure mode of short beam specimens is more complicated than that of double incisions with the increase of hygrothermal aging time, and the retention rate of shear strength is 60.938.3and 42.60.The failure mode of short beam specimens is more complicated than that of double incisions with the increase of hygrothermal aging time.
【作者单位】：南京航空航天大学能源与动力学院江苏省航空动力系统重点实验室;先进航空发动机协同创新中心;
【基金】：国家自然科学基金资助项目(51605218) 中国博士后科学基金(2015M571754) 中央高校基本科研业务费专项资金(NS2016029)
【分类号】：TB332

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