Behaviour of Fibre-Reinforced Composites under Dynamic Loading

Abstract

Stress-strain curves are presented for tensile impact tests on plain-weave glss/epoxy and plain-weave carbon/epoxy laminates loaded in a direction at 45 deg to both the warp and weft directions. From the initial linear-elastic response the in-plane shear moduli for the two types of reinforcement at impact rates of strain are derived. In conjunction with results previously obtained from tensile impact tests on the same laminates loaded in the warp and the weft directions, two-dimensional stiffness matrices for both the glass-fabric and the carbon-fabric reinforced plies are determined. When compared with similar stiffness matrices previously obtained under quasi-static loading a marked effect of strain rate is apparent, particularly for the glass-reinforced ply. Keywords: Fibre reinforced composites, Tensile impact testing, Hopkinson-bar.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Oct 30, 1987
Accession Number
ADA191310

Entities

People

  • John Harding
  • K. Saka
  • R. K. Li

Organizations

  • University of Oxford

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Composite Materials
  • Delamination
  • Failure Mode And Effect Analysis
  • Fibers
  • Laminated Glass
  • Laminates
  • Materials Laboratories
  • Measurement
  • Microscopes
  • Polymer Matrix Composites
  • Shear Modulus
  • Strain Gages
  • Stress Strain Relations
  • Stress Waves
  • Stresses
  • Tensile Strength
  • Two Dimensional

Fields of Study

  • Materials science

Readers

  • Reinforced Composite Materials
  • Structural Dynamics.