碳/芳混杂编织复合材料拉伸变形及损伤声发射监测  

TENSILE DEFORMATION AND DAMAGE ACOUSTIC EMISSION MONITORING OF CARBON/ARAMID HYBRID WOVEN COMPOSITES

作　　者：尹寒飞 张鹏飞[1] 丁振君[1] 周伟[1] YIN Han-fei;ZHANG Peng-fei;DING Zhen-jun;ZHOU Wei(Non-destructive Testing Laboratory,Hebei University,Baoding 071002,China)

机构地区：[1]河北大学无损检测研究所,保定071002

出　　处：《玻璃钢／复合材料》2018年第10期20-25,共6页Fiber Reinforced Plastics/Composites

基　　金：国家自然科学基金(11502064);河北省自然科学基金(E2016201019);河北省教育厅重点项目(ZD2016097)

摘　　要：将碳/芳混杂纤维编织布按不同铺层方式制备复合材料层合板,并结合声发射(Acoustic Emission,简称"AE")和数字图像相关(Digital Image Correlation,简称"DIC")方法互补技术,实时监测碳/芳混杂编织复合材料拉伸加载试验,研究复合材料拉伸过程的损伤演化。通过获取复合材料拉伸加载过程中的AE信号与表层位移场信息,分析碳/芳混杂编织复合材料损伤过程的AE特征响应行为与表层变形场变化。结果表明,碳/芳混杂编织复合材料碳纤维方向的幅值衰减比芳纶纤维方向的衰减缓慢。A类试件碳纤维方向加载时,复合材料拉伸强度最高;A类试件芳纶纤维方向加载时,复合材料韧性最好。B类复合材料试件的拉伸强度高于A类试件芳纶纤维方向加载强度值,韧性优于A类试件碳纤维方向加载的韧性。表层变形场信息清晰地反映了复合材料层合板变形与损伤破坏特征。AE与DIC方法互补技术为复合材料的无损检测、损伤评估和健康监测提供了有效途径。Carbon/aramid hybrid fiber woven fabrics were used to prepare composite laminates by different layering methods.In order to study the damage evolution of carbon/aramid hybrid woven composites during tensile process,tensile loading tests of the composites were monitored by using acoustic emission(AE)and digital image correlation(DIC)complementary techniques.According to AE signals and the surface displacement fields of the composites during the tensile loading,AE response characterizations and variation of surface deformation fields of carbon/aramid hybrid woven composites were analyzed.The results show that the amplitude attenuation in the carbon fiber direction is lower than that in the aramid fiber of the composites.In the case of type-A specimens,when the specimens are loaded in carbon fiber and aramid fiber direction,the highest tensile strength and toughness can be obtained,respectively.The tensile strength of type-B composite specimens is higher than that of type-A in the direction of aramid fiber,while the toughness is better than that of type-A in the direction of carbon fiber.The deformation and damage characteristics of composite laminates are clearly reflected by surface deformation fields.AE and DIC complementary technologies provide an effective method for nondestructive testing,damage assessment and health monitoring of the composites.

关 键 词：碳/芳编织混杂复合材料 声发射 数字图像相关 拉伸性能 

分 类 号：TB332[一般工业技术—材料科学与工程]