Real-time ultrasonic and acoustic emission monitoring of damage in graphite/epoxy laminates

Shi Chang Wooh, Isaac M. Daniel, Heoung Jae Chun

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Progressive failure of a crossply composite laminate under uniaxial tension was characterized by correlating ultrasonic and acoustic emission measurements with damage in real time. Both ultrasonic backscattered energy and acoustic emission gave consistent results and proved to be sensitive indicators of matrix cracking and other failure mechanisms. The acoustic emission signals were analyzed by investigating the amplitude and count frequency and the corresponding applied strain. Loading/unloading tests showed that no additional damage occurs upon reloading up to the previous peak load.

Original languageEnglish
Pages (from-to)1403-1412
Number of pages10
JournalComposites Engineering
Issue number12
Publication statusPublished - 1995

Bibliographical note

Funding Information:
Acknowledgements--This work was sponsored by the Air Force Office of Scientific Research (AFOSR). The authors are grateful to Dr Walter F. Jones of AFOSR for his encouragement and cooperation, and to Mrs Yolande Mallian for typing the manuscript.

All Science Journal Classification (ASJC) codes

  • Engineering(all)


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