Remote Nondestructive Evaluation of Composite-Steel Interface by Acoustic Laser Vibrometry

Abstract

Composite materials are increasingly being used in both civil and ship structures. In particular, fiber reinforced polymer (FRP) composites are being utilized. FRP materials are most often employed to reinforce aging or damaged portions of civil structures. On naval vessels, FRP materials are incorporated to reduce weight, particularly up high, and to reduce radar cross section, thereby increasing stealth capability. In both cases of FRP use, it is usually in conjunction with some other material, oftentimes steel. It is beneficial when using FRP and steel to adhesively bond them together. When these materials are joined adhesively, the most common failure mode is de bonding or delamination at the interface of the adhesive with the steel and composite materials. These defects are often difficult to discern without the aid of some form of nondestructive testing (NDT).

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2012
Accession Number
ADA567685

Entities

People

  • Timothy J. Emge Ii

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Carbon Fiber Reinforced Polymer
  • Carbon Fibers
  • Composite Materials
  • Doppler Effect
  • Engineers
  • Failure Mode And Effect Analysis
  • Fiber Reinforced Polymers
  • Finite Element Analysis
  • Material Degradation Processes
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Materials Testing
  • Measurement
  • Mechanics
  • Resonant Frequency

Fields of Study

  • Materials science

Readers

  • Radar Systems Engineering.
  • Structural Health Monitoring of Composite Structures.
  • Surface Coatings Technology.

Technology Areas

  • Directed Energy