Non-destructive evaluation (NDE) of ceramic armor: Testing

Raymond Brennan, Richard Haber, Dale Niesz, James McCauley

Research output: Contribution to journalConference article

6 Scopus citations

Abstract

Nondestructive evaluation (NDE) techniques have been used to analyze ceramic armor materials such as silicon carbide (SiC). Research has been conducted using contact and water immersion 25-100 MHz longitudinal and shear wave ultrasonic transducers in pulse-echo configurations to analyze defects in the form of acoustic differences in these materials. Time-of-flight (TOF) measurements were collected from oscilloscope traces of voltage verse time, and the thickness of the samples (t) at each point was recorded. Longitudinal (c 1) and shear wave velocities (c s) of the SiC samples were calculated using the equation, c= t/TOF. The velocities were used to calculate elastic properties of the material, including Young's modulus, shear modulus, and bulk modulus, which compared favorably to results reported in the literature. C-scan imaging was also utilized to map acoustic differences and identify locations of flaws and defects in the armor materials. This data, combined with ballistic testing, will provide crucial information about critical flaw sizes and populations in ceramic armor, serving as a major step for nondestructively gauging the success and failure of commercial armor plates.

Original languageEnglish (US)
Pages (from-to)231-238
Number of pages8
JournalCeramic Engineering and Science Proceedings
Volume26
Issue number7
Publication statusPublished - Dec 1 2005
Event29th International Conference on Advanced Ceramics and Composites - Cocoa Beach, FL, United States
Duration: Jan 23 2005Jan 28 2005

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All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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