摘要
采用激光扫描法研究了纤维增强复合薄板的损伤定位问题。建立复合薄板激光扫描线框模型,在明确振型数据提取原理的基础上,提出二维五点三次曲面平滑法,并推导获得用于损伤定位检测的量化指标-损伤位置指数。编写Matlab计算程序,并给出基于激光扫描法进行损伤定位的具体流程。搭建激光扫描振动测试系统,并以带有纤维断裂损伤的TC300碳纤维/树脂复合薄板为研究对象,进行实际测试。试验结果表明,利用上述方法可以准确检测出复合薄板的损伤位置,该方法及相关试验系统可以为复合材料结构的损伤检测及识别提供一种新思路。
This research studies damage location detection of fiber-reinforced composite thin plate based on laser scanning method. The laser scanning frame model of the composite plate is established, and when the extraction principle of modal shape data is illustrated, two-dimensional five-spot-tripling surface smoothing method is proposed, so that a quantitative index for damage location detection of fiber-reinforced composite thin plate, i.e., the damage location index can be derived. The Matlab calculation program is written, and the specific damage location detection procedures of composite plate based on laser scanning method are also proposed. T300 fiber/epoxy composite plate is taken as a study object, and damage detection experiment is performed based on the established laser scanning vibration testing system. It has been proved that the above method can detect fiber breakage position of such composite plate with high accuracy, and this method and the related experimental system can provide a new idea for damage detection and identification of composite structures.
作者
李晖
常永乐
张体南
徐忠浩
闻邦椿
LI Hui;CHANG Yongle;ZHANG Tinan;XU Zhonghao;WEN Bangchun(School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110004)
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2019年第18期8-14,共7页
Journal of Mechanical Engineering
基金
国家自然科学基金(51505070)
中央高校基本科研业务费专项资金(N150304011,N160313002)
东北大学航空动力装备振动及控制教育部重点实验室研究基金(VCAME201603)资助项目
关键词
纤维增强复合薄板
二维五点三次曲面平滑法
损伤定位
激光扫描法
试验研究
fiber-reinforced composite plate
two-dimensional five-spot-tripling surface smoothing method
damage location detection
laser linear scanning
experimental study
