Compression-After-Impact Behavior of ARALL(trade name)-1 Laminates

Abstract

ARALL(R) laminates are the first generation of a new class of materials combining the best properties of metals and composite materials. This report represents part of a Phase I of a two phase study of ARALL(R) -I laminates. Ten specimens were tested in a modified Boeing Compression-After- Impact fixture. Two specimens were undamaged. The remaining eight received impacts of 2.3 ft-lbs (3.18J), 5.5 ft-lbs (7.5J), 10.4 ft-lbs (14. lJ), and 11.7 ft-lbs (15.9J). Only dents were produced at 2.3 ft-lbs (3.18J). Back face cracks appeared at 5.5 ft-lbs (7.5J). Full penetration was achieved at 10.4 ft-lbs (14. lJ). Interior damage as measured by ultrasonic 'C' scan showed little damage beyond that already visible on the Surface. Compressive buckling was the mode of failure. Increasing impact energy decreased the buckling load of the specimens. 'C' scans taken after compression testing revealed no growth of the interior damage.

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Document Details

Document Type
Technical Report
Publication Date
Jul 14, 1992
Accession Number
ADA259203

Entities

People

  • William P. Hoogsteden

Organizations

  • Wright Laboratory

Tags

DTIC Thesaurus Topics

  • Aramid Fibers
  • Buckling
  • Composite Materials
  • Compression
  • Energy Levels
  • Engineering
  • Epoxy Composites
  • Failure Mode And Effect Analysis
  • Fiberglass
  • Impact Loads
  • Laminates
  • Materials
  • Materials Engineering
  • Materials Laboratories
  • Materials Science
  • Strain Gages
  • Stress Strain Relations

Readers

  • Aerospace Propulsion Engineering.
  • Ballistic Missile Meteorology
  • Structural Health Monitoring of Composite Structures.