复合材料裂纹参数对Lamb波非线性系数的影响研究

玻璃钢/复合材料 ›› 2019, Vol. 0 ›› Issue (6): 17-23.

复合材料裂纹参数对Lamb波非线性系数的影响研究

张青松, 铁瑛^*, 尹振华, 夏小松

郑州大学机械工程学院,郑州450000

收稿日期:2018-11-05 出版日期:2019-06-25 发布日期:2019-06-28
通讯作者: 铁瑛(1978-),女,副教授,主要研究方向为复合材料损伤分析,tieying@zzu.edu.cn。
作者简介:张青松(1994-),男,硕士生,主要研究方向为复合材料损伤分析。
基金资助:
河南省科技攻关项目(172102210001);水利部研究中心开放课题(201607);河南省高等学校青年骨干教师培养计划(2017GGJS003)

INFLUENCE OF CRACK PARAMETERS ON THE LAMB NONLINEAR INDEX OF ULTRASONIC IN COMPOSITE

ZHANG Qing-song, TIE Ying^*, YIN Zhen-hua, XIA Xiao-song

School of Mechanical Engineering, Zhengzhou University, Zhengzhou 450000, China

Received:2018-11-05 Online:2019-06-25 Published:2019-06-28

摘要/Abstract

摘要： 针对复合材料中裂纹的检测问题,建立了考虑裂纹接触非线性特性的各向异性复合材料的3D波动数值模型,研究非线性Lamb波与含有不同尺寸裂纹的复合材料的作用关系,探讨裂纹的长度和宽度对Lamb波非线性系数的影响。研究结果表明:一定范围内,裂纹长度的增加将导致Lamb波的非线性系数增加;裂纹宽度的增加将导致Lamb波的非线性系数减小。利用SNAP非线性超声检测设备,试验验证了通过超声检测非线性系数进行复合材料裂纹检测的可行性,这对后续进行复合材料的非线性无损探伤具有重要意义。

关键词: 复合材料, 非线性Lamb波, 裂纹, 非线性系数, 检测

Abstract: For detection of cracks in composite, a 3D finite element wave model of anisotropic composite plate considering the nonlinear crack contact was established to explore the interaction between nonlinear Lamb waves and different sizes of cracks in composite structure. The influence of the length and width of cracks on the nonlinear index of nonlinear Lamb waves was explored. The results show that the nonlinear index increases with the increase of the length of cracks within a certain range. As the width of cracks increases, the nonlinear index decreases. Using the SNAP nonlinear ultrasonic testing device in experiment, the feasibility of crack detection in composite materials by testing ultrasonic nonlinear index was verified. The experimental results show that the presence of cracks in the structure can be qualitatively evaluated by measuring the nonlinear index in the composite. This is of great significance to the follow-up nonlinear non-destructive testing of composite materials.

Key words: composite, nonlinear Lamb wave, cracks, nonlinear index, detection

中图分类号:

TB332

张青松, 铁瑛, 尹振华, 夏小松. 复合材料裂纹参数对Lamb波非线性系数的影响研究[J]. 玻璃钢/复合材料, 2019, 0(6): 17-23.

ZHANG Qing-song, TIE Ying, YIN Zhen-hua, XIA Xiao-song. INFLUENCE OF CRACK PARAMETERS ON THE LAMB NONLINEAR INDEX OF ULTRASONIC IN COMPOSITE[J]. Fiber Reinforced Plastics/Composites, 2019, 0(6): 17-23.

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