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Numerical Model and Analysis on Dynamics of Composites for Active Damage Detection

  • Zhi Wei
  • Minqiao Lu
  • Jun Zhang
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4114)

Abstract

This paper presents a study on active detection of internal damage based on numerical analysis of vibration dynamics in composites. Damage-induced variations of dynamic parameters are investigated both numerically and experimentally. Finite element method (FEM) is used to compute the modal parameters of composites with or without damages. Natural frequency, modal displacement, modal strain and strain energy are analyzed for the determination of damage severity and location. Vibration measurements are carried out using piezoelectric patch actuators and sensors for comparison and verification of the FEM model proposed in this study. Energy spectrum for wavelet packets decomposition of structural dynamic responses is used to highlight the features of damaged samples. The mechanism of mode-dependent energy dissipation of composite plates due to delamination is revealed for the first time. Both numerical and experimental findings in this study are significant to the establishment of guideline for damage identification in composite structures.

Keywords

Modal Parameter Composite Plate Wavelet Packet Finite Element Method Model Free Boundary Condition 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Zhi Wei
    • 1
  • Minqiao Lu
    • 2
  • Jun Zhang
    • 3
    • 4
  1. 1.School of Mechanical Engineering, Hebei University of TechnologyChina
  2. 2.Xingtai Vocational and Technical CollegeChina
  3. 3.Department of Computer Science, Sun Yat-sen UniversityChina
  4. 4.Guangdong Key Lab of Information SecurityChina

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