摘要
本文提出通过丝网印刷技术,将石墨烯导电碳油墨以及银浆油墨印刷在复合材料结构表面形成智能传感层,对复合材料结构中的损伤进行监测和识别。采用准静态压痕的方式在复合材料结构中引入多个损伤,通过在印刷传感层的边界电极依次注入微小的电流,测量获得损伤前后传感层边界电压变化,重建损伤引起的电导率变化图像,从而提供有关损伤的信息。试验结果表明,该印刷传感层性能良好,重建的电导率变化图像能够较好地反映损伤的数量、位置和近似尺寸,为复合材料结构中损伤的定量监测和识别提供了一种有前景的应用技术。
In this paper,an intelligent sensing layer is proposed to detect and identify damage by directly printing conductive graphene-doped carbon ink and silver ink on the surface of composite structure through screen printing technology.Quasi-static indentation method is adopted to introduce multiple sites of damage in the composite structure,and then tiny currents are sequentially injected into the electrodes pairs on the boundary of the printed sensing layer.According to the corresponding measured change of boundary voltages before and after damage,the images about the distribution of electrical conductivity change caused by the damage are reconstructed,providing useful information about the damage.Experimental results have demonstrated that,the printed sensing layer is well performed and the reconstructed tomographic images can successfully indicate the number,locations and approximate sizes of the damage,providing a promising technique for quantitative damage detection and identification for composite structures.
作者
郑一飞
严刚
郭树祥
Zheng Yifei;Yan Gang;Guo Shuxiang(State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
出处
《航空科学技术》
2020年第4期67-73,共7页
Aeronautical Science & Technology
基金
航空科学基金(2017ZA52005)
机械结构力学及控制国家重点实验室自主课题(MCMS-I-0218G01)
江苏高校优势学科建设工程资助项目。
关键词
复合材料结构
损伤监测和识别
印刷传感层
电阻抗成像
composite structure
damage detection and identification
printed sensing layer
electrical impedance tomography
