基于激光冲击波的金属薄板分层检测的研究
首发时间:2009-03-27
摘要:用脉冲激光对大面积的2024铝合金薄板分层(两层)试样和未分层的试样进行冲击,在试样表面覆盖有约束层和吸收层,在试样背面用PVDF传感器接收激光冲击波信号经示波器传输到计算机经过信号处理和对比研究。试验结果表明:通过对比分析和研究可以得出薄板分层(两层)的激光冲击波的特征,能够有效地检测2024铝合金薄板分层(两层),初步建立了特定对象的激光冲击波薄板分层(两层)的数学模型,为大面积的薄板分层(两层)试样的检测提供了一种新的方法,具有一定的工程意义和实用价值。
关键词: 激光冲击波 2024铝合金 薄板 分层 PVDF传感器
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Study on the Detection of Hierarchical Sheet-metal by Laser Shock Wave
Abstract:The large area delaminated (two layers) and non-delaminated samples of 1mm-thick aluminium alloy 2024 were shocked by pulse laser, the restricted layer and the absorbing layer were coated on the surface of the samples, and the PVDF sensors were set on the facing of a quilt of the samples. The signs of laser shock waves were transmitted to the computer by the oscillograph. The results indicated that can be effective detected by laser shock waves, and the math model of hierarchical sheet-metal by laser shock wave was fundamentally developed. A new method to detect the large area delaminated (two layers) samples was provided, which has the definite engineering importance.
Keywords: Laser shock wave 2024 duralumin alloy Hierarchical sheet-metal Lamination PVDF Sensor
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