摘要
利用声发射技术对复合材料层合板的低速冲击和压缩破坏进行了分析.测试过程中用声发射技术进行实时监测,结合载荷—位移曲线,分析了声发射能量,幅值和波形经过快速傅里叶变换后的峰值频率,并对典型信号的波形进行了频谱分析.结果表明:AE参数能很好的描述复合材料层合板低速冲击及其剩余压缩行为.
Abstract：The low-velocity impact and compressive failure processes of composite laminate were investigated by the acoustic emission （AE） technique in this paper. The test procedure was monitored by the acoustic emission （AE） technique. Combined with load-displacement curve during testing, the AE energy, amplitude and the peak frequency of a dominant frequency band after treated with the fast Fourier transform（FFT） were analyzed. The fre- quency spectrums of the waveforms for the type signals were discussed. Results reveal that the behavior of AE pa- rameters described well the composite laminates. damage process on the low-velocity impact and residual compressive behaviors of the
出处
《哈尔滨理工大学学报》
CAS
2014年第1期112-116,共5页
Journal of Harbin University of Science and Technology
基金
国家自然科学基金(11102055)
关键词
声发射
复合材料层合板
低速冲击
压缩
频谱
acoustic emission
composite laminates
low velocity impact
compression
frequency spectrum
