材料工程Issue(9)：48-53,6.
涂层接触疲劳损伤过程中的声发射小波分析
Acoustic Emission Wavelet Analysis of Coating During Contact Fatigue Damage Process
摘要
Abstract
Acoustic emission (AE) signals during different contact fatigue damage phases of Fe-based alloy coating were collected. The signals were five-layer decomposed and reconstructed by dB10 wavelet. Characteristics of waveform and frequency of AE signals during fatigue damage were analysed. The results show that continuous type of untreated AE waveform is dominant during crack initiation phase, then mixed type is dominant during crack stable growth phase, and burst type is dominant during crack unstable growth phase. That separation fatigue damage signals from interference waves by wavelet transform was achieved, and fatigue damage signals of improved signal-to-noise ratio were obtained. Distribution of frequency is different during different fatigue damage phases, and the more severe of fatigue damage, the more extensive of frequency distribution and the larger of waveform amplitude in every layers.关键词
接触疲劳/小波分析/声发射信号/损伤诊断Key words
contact fatigue/wavelet analysis/acoustic emission signal/damage diagnosis分类
矿业与冶金引用本文复制引用
张志强,李国禄,王海斗,徐滨士,朴钟宇..涂层接触疲劳损伤过程中的声发射小波分析[J].材料工程,2012,(9):48-53,6.基金项目
国家杰出青年科学基金(51125023) （51125023）
国家自然科学基金(50875075) （50875075）
国家9 73计划(2011CB013405) （2011CB013405）
