Novel NDT methods for composite materials in aerospace structures

Jinhao Qiu, Jun Cheng, Chao Zhang, Hongli Ji, Toshiyuki Takagi, Tetsuya Uchimoto

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

In this article, two novel NDT methods for composite structures are presented. First, the laser ultrasonic method for visualization of impact damage is introduced. A laser ultrasonic scanning system was developed, and the anomalous incident wave (AIW) energy was obtained from the wave-field data to image the artificial and impact damages. Next, a mid-frequency ECT (eddy current testing) system with the working frequency up to 250 kHz developed by the authors' lab for CFRP inspection is presented. The main features of the system include the weak-signal extraction method using the lock-in amplifier and the C-scan imaging techniques. The location and size of different damages were visualized in the scan image. With the developed system, the direction of different fiber plies could also be successfully detected.

Original languageEnglish
Pages (from-to)25-33
Number of pages9
JournalInternational Journal of Applied Electromagnetics and Mechanics
Volume52
Issue number1-2
DOIs
Publication statusPublished - 2016

Keywords

  • Composite materials
  • eddy current testing
  • laser ultrasonic method
  • nondestructive testing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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