运用声发射(Acoustic emission,AE)技术及基于小波变换的信号处理方法研究镁碳质(MgO-C)耐火材料受压损伤机制.通过AE技术检测材料受压损伤的声发射信号,采用小波变换方法对信号进行分解,运用小波能量系数,结合不同损伤相的物理特性,寻找与特定损伤机理相关的频率特征.结果显示,AE信号的能量主要集中在两种频率范围内,说明材料此时表现出两种不同的主导性损伤机制,为判别镁碳质耐火材料受压损伤机制提供了一种有效途径.
参考文献
| [1] | 耿荣生 .声发射技术发展现状[J].无损检测,1998,20(06):151. |
| [2] | Freeman S M.Characterization of lamina and interlamina damage in graphite-epoxy composites by the deeply technique[A].Phoenix,US,1981:50. |
| [3] | C.R. RAMIREZ-JIMENEZ;N. PAPADAKIS;N. REYNOLDS .Identification of failure modes in glass/polypropylene composites by means of the primary frequency content of the acoustic emission event[J].Composites science and technology,2004(12):1819-1827. |
| [4] | Qing-Qiing Ni;Masaharu Iwamoto .Wavelet transform of acoustic emission signals in failure of model composites[J].Engineering Fracture Mechanics,2002(6):717-728. |
| [5] | Hiroaki Suzuki;Tetsuo Kinjo;Mikio Takemoto.Fracture-mode determination of glass-fiber composites by various AE processing[A].Japan:The Japanese Society for NDI,1996:47. |
| [6] | 张德丰.详解MATLAB数字信号处理[M].北京:电子工业出版社,2010:303. |
| [7] | J. Bohse .Acoustic emission characteristics of micro-failure processes in polymer blends and composites[J].Composites science and technology,2000(8):1213-1226. |
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