Damage Detection in Holed Carbon Fiber Composite Laminates Using Embedded Fiber Bragg Grating Sensors Based on Strain Information
Damage Detection in Holed Carbon Fiber Composite Laminates Using Embedded Fiber Bragg Grating Sensors Based on Strain Information
复制标题
使用基于应变信息的嵌入式光纤布拉格光栅传感器检测带孔碳纤维复合材料层压板的损伤
DOI：
10.1155/2020/8813213
复制
发表时间：
2020-12-07
影响因子：
1.6
通讯作者：
Cao, Hao
中科院分区：
文献类型：
--
作者：
Ding, Guoping;Song, Wenhao;Cao, Hao
与金属材料相比，碳纤维增强塑料（CFRP）性能更加优异，具有高比强度和高比模量。而在各种CFRP结构构件中，CFRP层合板有着广泛的应用。然而，CFRP层合板总是会出现一些难以察觉的、隐藏的初级损伤，并且在加载后会不断演变和扩大。本工作从分析CFRP层合板应变分布变化与损伤扩展之间的关系入手，提出基于应变信息的CFRP层合板损伤识别方法。然后，建立了基于光纤布拉格光栅（FBG）传感器的CFRP层合板损伤监测系统，并进行了基于FBG传感器的CFRP层合板损伤识别实验，验证了CFRP层合板损伤识别方法的准确性。结果表明，基于模拟分析，FBG传感器出现损伤时的载荷与CFRP层合板损伤扩展时的载荷之间的最大误差不超过16%。验证了CFRP层合板损伤识别方法的准确性，实现了CFRP层合板及其扩展过程的损伤识别。
Compared with metal materials, Carbon Fiber Reinforced Plastic (CFRP) is more excellent in performance, with high specific strength and high specific modulus. And among various CFRP structural elements, CFRP laminated plates have widespread applications. However, some indiscernible and hidden primary damage always appears on the CFRP laminated plate and will continuously evolve and expand after being loaded. This work starts with the analysis of the relationship between the changes of the strain distribution and damage expansion of CFRP laminated plates and proposes the damage recognition method of CFRP laminated plates based on strain information. Then, the CFRP laminate damage monitoring system based on Fiber Bragg Grating (FBG) sensor is established, and the CFRP laminate damage identification experiment based on FBG sensor is made to verify the accuracy of the CFRP laminate damage identification method. The results show that the maximum error between the load when the damage appears on the FBG sensor and that when the damage of CFRP laminated plates expands based on the simulated analysis does not exceed 16%. The accuracy of the damage recognition method of CFRP laminated plates is verified and the damage recognition of CFRP laminated plates and their expansion process is achieved.