CAJ | 학술논문

为分析在激光冲击波作用下 AZ31 B镁合金薄板背面的动态响应，采用聚偏氟乙烯贴片传感器与数字示波器对强激光诱导的冲击波进行测量，得到压电波形，结合冲击波的传播特性，对弹塑性双波的传播规律进行了研究。结果表明：激光诱导的材料动态响应是快速的；压电波形图反映出的弹性前驱波与塑性加载波传播到靶材背面的时间与理论时间相符；弹性前驱波能量小引发的波形振幅较小，紧随着的塑性加载波能量大并引起较大振幅波动，弹塑性双波卸载过程与紧接着的加载过程导致了压电信号的波动振幅提高。
위분석재격광충격파작용하 AZ31 B미합금박판배면적동태향응，채용취편불을희첩편전감기여수자시파기대강격광유도적충격파진행측량，득도압전파형，결합충격파적전파특성，대탄소성쌍파적전파규률진행료연구。결과표명：격광유도적재료동태향응시쾌속적；압전파형도반영출적탄성전구파여소성가재파전파도파재배면적시간여이론시간상부；탄성전구파능량소인발적파형진폭교소，긴수착적소성가재파능량대병인기교대진폭파동，탄소성쌍파사재과정여긴접착적가재과정도치료압전신호적파동진폭제고。
To analyze the dynamic response of the back of AZ31B magnesium alloy sheet to laser shock wave,the laser in-duced shockwave was measured by PVDF patch sensors and a digital oscilloscope and then piezoelectric waveforms were got.The propagation law of elastic and plastic wave structure was studied combined with shock wave propagation characteristics.The re-sults indicate that the laser induced dynamic response of the material is transient.The time of elastic precursors wave and plastic load wave propagate to the back of the sheet is reflected by the piezoelectric waveforms.Which corresponds to the time of the the-ory.The waveform amplitude triggered by elastic precursor wave is small while the following plastic load wave causes larger am-plitude fluctuations because of its larger energy.The loading process and unloading process of the waves have led to the amplitude increase of the piezoelectric signal.