Effects of Surface Flaws on Impact Resistance of Uncoated Polycarbonate

Abstract

Uncoated aircraft transparency polycarbonate is highly susceptible to surface abrasions. This report describes an experimental effort of limited scope to determine the effects of flaws on the resistance of polycarbonate to the impulsed, high energy loading conditions of bird impact. Test fixturing for flaw formation and high rate load application to polycarbonate beam specimens is described. It is demonstrated that polycarbonate is sensitive to changes in scratch profile and is less sensitive to changes in scratch depth. Net absorbed energy decreases with increasing scratch depth. However, scratches of any depth produce fracture if the scratch has a sharp, 'V'-shaped profile.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1984
Accession Number
ADA141364

Entities

People

  • Michael P. Bouchard

Organizations

  • University of Dayton

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aeronautical Laboratories
  • Air Force
  • Air Force Facilities
  • Applied Mechanics
  • Buildings And Structures
  • Classification
  • Contracts
  • Dynamics
  • Failure Mode And Effect Analysis
  • Governments
  • Magnification
  • Mechanics
  • Resistance
  • Security
  • Universities
  • Vehicle Equipment
  • Vehicles

Readers

  • Explosive Engineering.
  • Metallurgy
  • Surface Coatings Technology.