Flaw detection in a multi-material multi-layered composite: using fem and air-coupled ut

Journal Article · Thu Jun 23 00:00:00 EDT 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3592039· OSTI ID:21511652

Livings, R A; Dayal, V ^[1]; Barnard, D J; Hsu, D K ^[2]

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1. Department of Aerospace Engineering, Iowa State University, Ames, IA 50010 (United States)
2. Center for Nondestructive Evaluation, Iowa State University, Ames, IA 50010 (United States)

Ceramic tiles are the main ingredient of a multi-layer multi-material composite being considered for the modernization of tank armors. The high stiffness, low attenuation, and precise dimensions of these uniform tiles make them remarkable resonators when driven to vibrate. This study is aimed at modeling the vibration modes of the tiles and the composite lay-up with finite element analysis and comparing the results with the resonance modes observed in air-coupled ultrasonic excitation of the tiles and armor samples. Defects in the tile, during manufacturing and/or after usage, are expected to change the resonance modes. The comparison of a pristine tile/lay-up and a defective tile/lay-up will thus be a quantitative damage metric. The understanding of the vibration behavior of the tile, both by itself and in the composite lay-up, can provide useful guidance to the nondestructive evaluation of armor panels containing ceramic tiles.

• OSTI ID: 21511652
• Journal Information: AIP Conference Proceedings, Vol. 1335, Issue 1; Conference: Review of progress in quantitative nondestructive evaluation, San Diego, CA (United States), 18-23 Jul 2010; Other Information: DOI: 10.1063/1.3592039; (c) 2011 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
36 MATERIALS SCIENCE
AIR
ARMOR
ATTENUATION
CERAMICS
COMPARATIVE EVALUATIONS
DAMAGE
DEFECTS
DETECTION
EXCITATION
FINITE ELEMENT METHOD
FLEXIBILITY
LAYERS
MANUFACTURING
NONDESTRUCTIVE ANALYSIS
OSCILLATION MODES
RESONANCE
RESONATORS
SIMULATION
TANKS
CALCULATION METHODS
CHEMICAL ANALYSIS
CONTAINERS
ELECTRONIC EQUIPMENT
ENERGY-LEVEL TRANSITIONS
EQUIPMENT
EVALUATION
FLUIDS
GASES
MATHEMATICAL SOLUTIONS
MECHANICAL PROPERTIES
NUMERICAL SOLUTION
TENSILE PROPERTIES