An Experimental and Finite Element Investigation into the Nonlinear Material Behavior of Pin-Loaded Composite Laminates

Abstract

The effect of crossply linear intralaminar shear behavior on the modeling accuracy of pin-loaded ((0/9)n)s and (+45/-45)ns composite laminates was quantitatively investigated. Both linear and nonlinear elastic three dimensional finite element approximations that included pin elasticity and contact angle formation were generated. These approximations were compared to both front surface in-plane and out-of plane experimental moire displacement contours generated from geometric and projection shadow moire techniques. A modified three point bend test was used to obtain values of laminate transverse shear moduli while through thickness contraction measurements on laminate tension tests were employed to obtain estimates of the Poisson ratio values. Nonlinear crossply intralaminar shear behavior was determined from the ASTM D3518-76 specification.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1991
Accession Number
ADA232098

Entities

People

  • Steven M. Serabian

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Composite Material Fabrication
  • Composite Materials
  • Failure Mode And Effect Analysis
  • Finite Element Analysis
  • Laminates
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Materials Testing
  • Mechanical Engineering
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Micromechanics
  • Reinforced Plastics
  • Stress Strain Relations

Fields of Study

  • Physics

Readers

  • Structural Dynamics.
  • Structural Health Monitoring of Composite Structures.