摘要
针对复合材料中由于低速冲击产生的不可见损伤,建立了混频检测有限元模型,以预测不同冲击能量下复合材料的超声非线性混频响应。采用落锤冲击实验和RAM-5000 SNAP非线性超声检测实验系统研究非线性混频Lamb波与不同冲击能量冲击损伤的复合材料的相互作用关系,并对有限元模型进行对比验证。探讨了混频Lamb波检测冲击损伤的可行性,以及不同冲击能量对混频Lamb波和频非线性系数的影响。研究结果表明:混频Lamb波可用于检测冲击损伤,其和频幅值及和频非线性系数随着冲击能量的增大而增大,和频非线性系数可以有效评估复合材料板受到的冲击损伤情况。
This paper aims at the invisible damage caused by low velocity impact in composites. A finite element model of mixing detection is established to predict the ultrasonic nonlinear mixing response of composites under different impact energy. The drop-weight impact test and RAM-5000 SNAP nonlinear ultrasonic testing system were used to study the interaction between nonlinear mixing Lamb waves and composites damaged with different impact energy, and the finite element model was compared and verified. The feasibility of detecting impact damage by mixing Lamb wave and the influence of different impact energy on the nonlinear coefficient of mixing Lamb wave sum frequency are discussed. The results show that mixing Lamb wave can be used to detect impact damage, and the sum frequency amplitude and sum frequency nonlinear coefficient increase with the increase of impact energy, and the sum frequency nonlinear coefficient can effectively evaluate the impact damage of composite plates.
作者
丛世凡
铁瑛
张晨曦
尹振华
CONG Shi-fan;TIE Ying;ZHANG Chen-xi;YIN Zhen-hua(School of Mechanical Engineering,Zhengzhou Lniversity,Zhengzhou 450001,China)
出处
《复合材料科学与工程》
CAS
北大核心
2021年第10期26-33,共8页
Composites Science and Engineering
基金
国家自科基金民航联合基金(U1833116)
河南省科技攻关项目(172102210001)。
关键词
复合材料
非线性混频Lamb波
和频非线性系数
低速冲击
混频检测
和频幅值
composite materials
nonlinear mixing Lamb wave
sum frequency nonlinear coefficient
low velocity impact
mixing detection
sum frequency amplitude
