传感技术学报2016，Vol.29Issue(9)：1361-1364,4.DOI:10.3969/j.issn.1004-1699.2016.09.011
基于光纤光栅的悬臂结构疲劳裂纹实验研究
Experimental Study of Fatigue Crack Based on FBG Cantilever Structure
摘要
Abstract
Fatigue failure and cracks have significant impacts on mechanical structure and working life. In this pa⁃per,a vane and other cantilever type structures are designed by using fiber grating to measure fatigue,the effects of cracks on structural fatigue process are proved by contrasting experiments. The experimental results show that:the natural frequency of the complete structure of sample is 124.2 Hz,after 5×106 cycles of trials,the natural frequency and the center wavelength of sample show no evident change;Meanwhile,the natural frequency of sample with a crack depth of 0.1 mm is 123.3 Hz,after 5 × 106 cycles,the natural frequency becomes 86.68 Hz,this demonstrates the notable impact of crack on the fatigue life of mechanical structure.关键词
疲劳/裂纹/悬臂结构/光纤光栅/固有频率Key words
fatigue/crack/cantilever structure/FBG/natural frequency分类
机械制造引用本文复制引用
徐刚,梁磊,仇磊,李红丽,梅华平,曹珊..基于光纤光栅的悬臂结构疲劳裂纹实验研究[J].传感技术学报,2016,29(9):1361-1364,4.基金项目
国家自然科学基金项目（61505150）；湖北省教育厅科学技术研究项目（Q20152705）；湖北工程学院科学研究项目 （）
