Accession Number:

ADA011112

Title:

Effect of Metallic-Reinforcement on the Stress Concentrations around a Circular Penetration in a Fiber-Reinforced Rectangular Plate.

Descriptive Note:

Technical memo.,

Corporate Author:

PENNSYLVANIA STATE UNIV UNIVERSITY PARK APPLIED RESEARCH LAB

Personal Author(s):

Report Date:

1973-05-18

Pagination or Media Count:

62.0

Abstract:

The effect of metallic ring-reinforcement on the stress fields surrounding a circular penetration in unipanel and crossply plates was investigated. Aluminum and stainless steel reinforcements were employed and the plates were subjected to both uniaxial and biaxial stress states. Stresses at the interface of the reinforcing ring and composite plate were generated using the finite element method. Numerical results were verified by photoelastic experimentation. For the uniaxially applied loading case, ring-reinforcement resulted in both a reduction and shift in location of peak maximum and minimum principal stress concentrations and peak maximum shear stress concentrations. For the biaxially loaded plates, the use of reinforcing rings resulted in higher peak maximum principal stress concentrations and lower peak minimum principal and maximum shear stress concentrations. In general, the use of either aluminum or steel reinforcement resulted in little difference in stress concentrations around the penetration except for the maximum principal stress concentrations in the biaxially loaded plates.

Subject Categories:

  • Laminates and Composite Materials
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE