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Damage detection method based on Lamb waves for stiffened composite panels

机译：基于LAMB波的损伤检测方法加强复合板

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摘要

Stiffened composite panels are widely used in industry, and their safety requirements have drawn great attention. However, non-destructive testing and evaluation (NDT&E) methods for these panels are still limited. This is due to the fact that the stiffeners induce complex signals during damage detection. This paper presents a new damage detection method for stiffened composite panels based on Lamb waves. The method combines a quantitative wavefront expression for an anisotropic composite and the conventional time-of-flight (ToF) method to detect debonding damage between stiffeners and the composite skin as well as low-velocity impact damage in the skin sheet. Initially, Lamb wave propagation characteristics are evaluated by numerical simulations to obtain mode conversion at the stiffener and delay after transmission through the stiffener. Then the numerical simulations and experiments are implemented in stiffened cross-ply composite laminates to verify the effectiveness and accuracy of the proposed method. Results indicate that the proposed method can accurately locate damage and has potential for industrial application.
机译：加强复合板在工业中广泛应用，安全要求引起了极大的关注。然而，这些面板的非破坏性测试和评估（NDT＆E）方法仍然有限。这是由于加强件在损坏检测期间诱导复杂信号。本文介绍了基于羊羔波的加强复合板的新损伤检测方法。该方法结合了各向异性复合材料的定量波前表达和传统的飞行时间（TOF）方法，以检测加强剂和复合皮肤之间的剥离损伤以及皮肤片中的低速冲击损伤。最初，通过数值模拟评估LAMB波传播特性，以通过加强件传输在加强件和延迟之后获得模式转换。然后，数值模拟和实验在加强的交叉层复合层压板中实施，以验证所提出的方法的有效性和准确性。结果表明，该方法可以准确定位损坏并具有工业应用的潜力。

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  • 来源
    《Composite Structures》 |2019年第10期|111137.1-111137.11|共11页
  • 作者

    Zheng Kaihong; Li Zheng; Ma Zhaoyang; Chen Jianlin; Zhou Jie; Su Xianyue;

  • 作者单位

    Peking Univ Coll Engn State Key Lab Turbulence & Complex Syst Beijing 100871 Peoples R China;

    Peking Univ Coll Engn State Key Lab Turbulence & Complex Syst Beijing 100871 Peoples R China;

    Peking Univ Coll Engn State Key Lab Turbulence & Complex Syst Beijing 100871 Peoples R China;

    Peking Univ Coll Engn State Key Lab Turbulence & Complex Syst Beijing 100871 Peoples R China;

    Peking Univ Coll Engn State Key Lab Turbulence & Complex Syst Beijing 100871 Peoples R China;

    Peking Univ Coll Engn State Key Lab Turbulence & Complex Syst Beijing 100871 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Stiffened composite panel; Lamb waves; Debonding; Low-velocity impact damage; Continuous wavelet transform;

    机译：加强复合板;羊波;剥夺;低速冲击损伤;连续小波变换;

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