Dynamic Responses of a Graphite/Epoxy Laminated Beam to Impact of Elastic Spheres.

Abstract

Wave propagation in ?90/45/90/-4S/90)sub 2s and (O/45/O/-45/O)sub 2s laminates of a graphite/epoxy composite due to impact of a steel ball was investigated experimentally and also by using a high order beam finite element. Dynamic Strain responses at several locations were obtained using strain gages. The finite element program which incorporated statically determined contact laws was employed to calculate the contact force history as well as the target beam dynamic deformation. The comparison of the finite element solutions with the experimental data indicated that the static contact laws for loading and unloading (developed under this grant) are adequate for the dynamic impact analysis. It was found that for the (O/45/O/-45/O)sub 2s laminate which has a much larger longitudinal bending rigidity, the use of beam finite elements is not suitable and plate finite element should be used instead. (MM)

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1982
Accession Number
ADA303165

Entities

People

  • Chintech Sun
  • Tianhong Wang

Organizations

  • Purdue University

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Aeronautics
  • Air Force
  • Aircrafts
  • Composite Materials
  • Dynamic Response
  • Engineering
  • Epoxy Laminates
  • Experimental Data
  • Foreign Object Damage
  • Impact Point
  • Jet Propulsion
  • Laminates
  • Materials
  • Materials Laboratories
  • Mechanics
  • Navy
  • Strain Gages

Fields of Study

  • Engineering

Readers

  • Combustion Dynamics and Shock Wave Physics.
  • Fluid Dynamics.
  • Reinforced Composite Materials