复合材料补片尺寸和形状对铝板修补结构lamb波传播影响

摘要

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8mm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.%In order to study the influence of composite patch size and shape on lamb wave detection of aluminum plate repair structure,the structure models including piezoelectric transducers (PZTs) with the piezoelectric and inverse piezoelectric effect,aluminum plate,composite laminate patch and adhesive layer were established by means of ANSYS software.The lamb wave signal was excited and received in the models.Tests were used to verify the correctness of the model.The influence of damage on the propagation characteristics of Lamb wave in the structure was studied.The damage detection of the structure with composite patch was simulated to study the effect of different size and shape patches repairing the 8rmm hole on the propagation characteristics.The simulation results of circular,square and rhombus patches show that different shapes have different effects on A0 and S0 wave packets.Rhombus patches of different sizes are also different for A0 and S0 wave packets.