Damage Assessment in Composites by Acousto-Ultrasonic Technique

Abstract

The main objective of the research was to develop and refine the acousto-ultrasonic technique to assess damage in composite materials. Specifically, this research was directed toward three goals: 1) to improve the acousto-ultrasonic technique by focusing on the understanding of the relationship between material properties and wave propagation, 2) to establish operational methods for research and industrial applications, and 3) to improve material characterization and damage assessment using the refined technique. Both analytical and experimental approaches were employed to optimize the acousto-ultrasonic technique. The following topics were investigated in the study: Calibration of acoustic emission system and preamplifier; Characteristics of the output wave from transducer; Acousto-ultrasonic wave propagation in composite laminates; Evolution of acousto-ultrasonic wave envelope in composite laminates; Propagation of different waveforms; Assessment of impact damage; Assessment of ply cracks; Assessment of cut fibers. Keywords: Damage asessment; Composite structures.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1989
Accession Number
ADA216590

Entities

People

  • H. T. Hahn
  • Jung‐Hee Lee

Organizations

  • Pennsylvania State University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Emissions
  • Amplitude
  • Composite Materials
  • Composite Structures
  • Damage
  • Damage Assessment
  • Epoxy Laminates
  • Fourier Analysis
  • Frequency
  • Graphitic Materials
  • Laminates
  • Materials
  • Micromechanics
  • Personal Information Managers
  • Ultrasounds
  • Wave Propagation
  • Waves

Readers

  • Structural Health Monitoring of Composite Structures.