Elastic wave attenuation in composite laminates with cracks

David Miller, Santanu Das, Xu Zhou, Aditi Chattopadhyay

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations


In structural health monitoring, energy dissipation of wave propagation is a key factor to determine optimal placement of sensors and quantify damage. This paper focuses on the study of wave scattering and attenuation in fiber-reinforced composite laminates with damage. In order to obtain the overall attenuation coefficient, the propagation of elastic shear wave in fiber-matrix medium is investigated starting from the Helmholtz equation. The wave attenuation due to interfacial damage is considered. The attenuation due to cracks of varying sizes and the effect of frequency on the attenuation value has been examined. It can be shown that a critical frequency exists at a given crack size for which the attenuation in the composite medium is at it highest value. Furthermore, the wave attenuation in composite laminates is investigated by incorporating energy transfer in layerwise medium. The overall attenuation coefficient for the laminate is obtained. Experiments are also conducted to evaluate some of the observations obtained from the model.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsA.B. Flatau
Number of pages12
StatePublished - 2005
EventSmart Structures and Materials 2005 - Smart Structures and Integrated Systems - San Diego, CA, United States
Duration: Mar 7 2005Mar 10 2005


OtherSmart Structures and Materials 2005 - Smart Structures and Integrated Systems
Country/TerritoryUnited States
CitySan Diego, CA


  • Composite laminate
  • Crack
  • Structural health monitoring
  • Wave attenuation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics


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