【作者】 陈建军； 章德； 毛一葳；

【Author】 CHEN Jianjun,ZHANG De,MAO Yiwei (The Institute of Acoustics,Nanjing University,Nanjing,210093,China)

【机构】 南京大学声学研究所；

【摘要】 随着现代工业的发展,多层复合材料的使用也越来越广泛。多层复合材料在粘接的时候或者使用了一段时间后,层与层之间的粘接界面会出现裂纹,可能导致材料断裂,这就为多层复合材料的安全使用埋下隐患。采用接触声非线性方法可以对复合材料粘接界面粘接状态进行检测。但在粘接的时候由于粘接剂涂层的不均匀或使用过程中的拉伸作用,裂纹会产生裂纹深度,以前的研究没有考虑裂纹深度对界面接触声非线性的影响。本文主要研究了裂纹深度对界面接触声非线性产生的影响,为提高接触声非线性方法检测界面粘接力的精度打下基础。更多还原

【Abstract】 Due to the development of the modem industry,the multilayered composite materials are widely used.When the composite materials are formed by bonding the layers together or after they have been used for a period of time,some micro-cracks will appear in the interface which will possibly cause the composite materials to break.The weak bonding region with the micro-cracks is possibly the initial spot of the entire equipment’s failure.A contact acoustic nonlinearity (CAN) method has been proposed to detect the bonding state of the bonded solid-solid interface.But because of the uneven bonding material or the tension action,the depth will appear in the micro-cracks.In this paper the influence of the micro-cracks’ depth to the CAN is discussed,which will improve the accuracy of the CAN method to the bonding state.更多还原