Accession Number:

ADA303165

Title:

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

Descriptive Note:

Corporate Author:

PURDUE UNIV LAFAYETTE IN COMPOSITE MATERIALS LAB

Personal Author(s):

Report Date:

1982-09-01

Pagination or Media Count:

60.0

Abstract:

Wave propagation in 904590-4S90sub 2s and O45O-45Osub 2s laminates of a graphiteepoxy 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 O45O-45Osub 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

Subject Categories:

  • Aircraft
  • Laminates and Composite Materials
  • Ballistics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE