三维五向碳纤维编织复合材料拉伸损伤演化行为研究

玻璃钢/复合材料 ›› 2019, Vol. 0 ›› Issue (7): 21-27.

三维五向碳纤维编织复合材料拉伸损伤演化行为研究

韩康宁¹, 李小童², 秦礽¹, 周伟^1*

1.河北大学无损检测研究所,保定071002;
2.国家知识产权局专利局专利审查协作河南中心,郑州450000

收稿日期:2018-11-19 出版日期:2019-07-28 发布日期:2019-07-28
通讯作者: 周伟(1980-),男,博士,教授,主要从事复合材料声学及光学无损检测技术方面的研究,zhouweihy@126.com。
作者简介:韩康宁(1993-),女,在读硕士研究生,主要从事复合材料无损检测技术方面的研究。注:第二作者所作贡献与第一作者相同。
基金资助:
国家自然科学基金(11502064);河北省自然科学基金(E2016201019)

STUDY ON THE TENSILE DAMAGE EVOLUTION BEHAVIOR OF THREE DIMENSIONAL FIVE DIRECTIONAL CARBON FIBER BRAIDED COMPOSITES

HAN Kang-ning¹, LI Xiao-tong², QIN Reng¹, ZHOU Wei^1*

1.Non-destructive Testing Laboratory, Hebei University, Baoding 071002, China;
2.Patent Examination Cooperation (Henan) Center of the Patent Office, SIPO Zhengzhou 450000, China

Received:2018-11-19 Online:2019-07-28 Published:2019-07-28

摘要/Abstract

摘要： 为了揭示不同纤维体积分数下碳纤维三维五向编织复合材料损伤演化规律以及纤维断裂等损伤模式,结合声发射(Acoustic Emission,简称“AE”)、数字图像相关(Digital Image Correlation,简称“DIC”)以及红外热成像(Infrared Thermography,简称“IT”)多源互补监测技术,对复合材料进行拉伸力学性能实验,动态获取拉伸载荷下的AE信号以及损伤过程中的表面应变场与温度场信息。结果表明:随着纤维体积分数的增加,碳纤维三维五向编织复合材料的失效载荷和断裂强度增加,相对能量有所提高,单位时间内AE信号增长加快。在纱线交织区域出现了明显的应变集中现象,形成锯齿形的应变集中带。随着拉伸载荷不断增加,复合材料试件表面温度持续升高,试件破坏瞬间,有明显的温度表征,与应变场失稳破坏表征吻合。因此,结合AE、DIC和IT互补检测技术,能够有效地监测碳纤维三维五向编织复合材料的损伤演变过程,为其结构健康检测提供参考。

关键词: 三维五向编织复合材料, 声发射, 数字图像相关, 红外热成像, 拉伸变形损伤

Abstract: In order to reveal the damage evolution rule and the effect of the damage mode on the properties of the composites under different fiber volume fraction, combined with the Acoustic Emission (AE), Digital Image Correlation (DIC) and Infrared Thermography (IT) complementary monitoring technology, the tensile mechanical properties of the composites were tested and the AE signals under tensile load and the surface strain field and temperature field information during the damage process were obtained dynamically. The results show that, with the increase of fiber volume fraction, the failure load and fracture strength of carbon fiber three-dimensional five-direction composite material increase, the relative energy increase, and the AE signal grows faster per unit time. Obvious strain concentration occurs in the interlaced area of yarn, forming a serrated strain concentration belt. With the continuous increase of tensile load, the surface temperature of the composite specimen increases continuously, and the specimen has obvious temperature characterization at the moment of failure, which is consistent with the failure characterization of strain field instability. Therefore, the combination of AE, DIC and IT complementary detection technology can effectively monitor the damage evolution process of fiber three-dimensional five-directional braid composite materials, providing reference for the structural health detection.

Key words: three-dimensional five-directional braided composite, acoustic emission, digital image correlation, infrared thermography, tensile deformation damage

中图分类号:

TB332

韩康宁, 李小童, 秦礽, 周伟. 三维五向碳纤维编织复合材料拉伸损伤演化行为研究[J]. 玻璃钢/复合材料, 2019, 0(7): 21-27.

HAN Kang-ning, LI Xiao-tong, QIN Reng, ZHOU Wei. STUDY ON THE TENSILE DAMAGE EVOLUTION BEHAVIOR OF THREE DIMENSIONAL FIVE DIRECTIONAL CARBON FIBER BRAIDED COMPOSITES[J]. Fiber Reinforced Plastics/Composites, 2019, 0(7): 21-27.

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