Failure Mechanics in Low-Velocity Impacts on Thin Composite Plates.

Abstract

Eight-ply quasi-isotropic composite plates of Thornel 300 graphite in Narmco 5208 epoxy resin (T300/5208) were tested to establish the degree of equivalence between low-velocity impact and static testing. Both the deformation and failure mechanics under impact were representable by static indentation tests. Under low-velocity impacts, such as tool drops, the dominant deformation mode of the plates was the first, or static, mode. Higher modes are excited on contact, but they decay significantly by the time the first-mode load reaches a maximum.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1983
Accession Number
ADA302602

Entities

People

  • Wolf Elber

Organizations

  • Langley Research Center

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Composite Materials
  • Delamination
  • Dynamic Tests
  • Energy Levels
  • Epoxy Composites
  • Epoxy Resins
  • Failure Mode And Effect Analysis
  • Fibers
  • Graphitic Materials
  • Impact Loads
  • Impact Tests
  • Laminates
  • Materials Laboratories
  • Mechanics
  • Static Tests
  • X Rays

Readers

  • Structural Health Monitoring of Composite Structures.