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借助于ANSYS软件建立包含铝板、复合材料层合板补片、胶层和压电陶瓷片(PZT)的压电和逆压电效应的模型,实现在结构中激励和接收lamb波信号,并以试验验证模型的正确性。利用损伤对结构中lamb波传播特性的影响,对复合材料补片修补后的金属损伤结构的损伤检测进行数值模拟研究,研究不同补片尺寸及形状修补8 mm孔对lamb波损伤检测的影响。结果表明,圆形、方形、菱形补片的仿真模拟结果显示不同的形状对A0和S0波包的影响差异较大,不同尺寸的菱形补片也对A0和S0波包有较大差异。
With the help of ANSYS software, a model of piezoelectric and inverse piezoelectric effect including aluminum sheet, composite laminate patch, glue layer and piezoelectric ceramic sheet (PZT) was established to excite and receive the lamb wave signal in the structure, Verify the correctness of the model. The effect of damage on the propagation of the lamb wave in the structure was investigated. The damage of the damaged composite structure after repaired by the composite material was studied numerically. The effect of different patch size and shape repaired 8 mm hole on the detection of the lamb wave damage was studied. The results show that the simulation results of round, square and rhombic patches show that the influence of different shapes on the A0 and S0 wave packets is quite different. The rhombic patches of different sizes also have great differences on A0 and S0 wave packets.