碳纤维编织复合材料损伤变形与破坏实验研究
发布时间：2019-01-07 17:37
【摘要】：通过对碳纤维编织复合材料的拉伸实验,利用声发射技术(Acoustic Emission,简称"AE")和数字图像相关(Digital Image Correlation,简称"DIC")方法研究碳纤维复合材料的损伤演化规律。通过采集试件在拉伸过程中的声发射信号、损伤变形与应变场信息,分析碳纤维编织复合材料的力学加载、变形场和声发射特征参数的关系。结果表明复合材料的位移场、应变场信息以及AE信号特征参数能良好地描述复合材料在拉伸状态下的损伤累积和破坏过程。在加载前期,以40~60 dB低幅度信号为主;随着载荷增加,撞击累计数急剧升高,高幅度、高持续时间信号增多。通过DIC测得的位移场和应变场信息,发现对于相同的载荷增量,加载方向的位移和最大拉应变呈先增加后减小的趋势。
[Abstract]:The damage evolution of carbon fiber braided composites was studied by means of acoustic emission (Acoustic Emission,) and digital image correlation (Digital Image Correlation, ("DIC"). The relationship among mechanical loading, deformation field and acoustic emission characteristic parameters of carbon fiber braided composites was analyzed by collecting acoustic emission signals and information of damage deformation and strain field during tensile process. The results show that the displacement field, strain field information and AE signal characteristic parameters can well describe the damage accumulation and failure process of the composite under tensile condition. In the early stage of loading, the low amplitude signal of 40 ~ 60 dB is the main signal, and with the increase of the load, the impact accumulative count increases sharply, the high amplitude and the high duration signal increase. Through the information of displacement field and strain field measured by DIC, it is found that for the same load increment, the displacement and maximum tensile strain of loading direction increase first and then decrease.
【作者单位】： 河北大学无损检测研究所;河北大学综合实验中心;
【基金】：国家自然科学基金(11502064) 河北省自然科学基金(E2016201019,F2015201215)
【分类号】：TB332;TQ342.742
本文编号：2403941
[Abstract]:The damage evolution of carbon fiber braided composites was studied by means of acoustic emission (Acoustic Emission,) and digital image correlation (Digital Image Correlation, ("DIC"). The relationship among mechanical loading, deformation field and acoustic emission characteristic parameters of carbon fiber braided composites was analyzed by collecting acoustic emission signals and information of damage deformation and strain field during tensile process. The results show that the displacement field, strain field information and AE signal characteristic parameters can well describe the damage accumulation and failure process of the composite under tensile condition. In the early stage of loading, the low amplitude signal of 40 ~ 60 dB is the main signal, and with the increase of the load, the impact accumulative count increases sharply, the high amplitude and the high duration signal increase. Through the information of displacement field and strain field measured by DIC, it is found that for the same load increment, the displacement and maximum tensile strain of loading direction increase first and then decrease.
【作者单位】： 河北大学无损检测研究所;河北大学综合实验中心;
【基金】：国家自然科学基金(11502064) 河北省自然科学基金(E2016201019,F2015201215)
【分类号】：TB332;TQ342.742
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