Transverse Shear Effects in Bimodular Composite Laminates.

Abstract

A closed-form solution for the Timoshenko-type shear correction coefficient (K2) governing the deflection of bimodular composite laminates in cylindrical bending is presented. The bending-stress distribution for a laminate constructed of bimodular materials (which have different elastic moduli in tension and compression) is used in the two-dimensional equilibrium equation to obtain the transverse shear-stress distribution. This shear-stress distribution is used to obtain expressions for the shear correction coefficient (based on equivalent shear strain energy) and the maximum dimensionless transverse shear stress (Tau xz) max. Finally, the effects of the elastic-constant ratios on the neutral-surface location and shear correction coefficient for laminates consisting of either unimodular or bimodular materials are studied.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1983
Accession Number
ADA130261

Entities

People

  • C. W. Bert
  • F. Gordaninejad

Organizations

  • University of Oklahoma

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Bending Stress
  • Composite Materials
  • Compression
  • Couplings
  • Engineering
  • Equations
  • Laminates
  • Materials Science
  • Mechanics
  • Micromechanics
  • Military Research
  • Modulus Of Elasticity
  • Neutral
  • Polymer Matrix Composites
  • Shear Modulus
  • Shear Stresses
  • Stiffness

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Structural Dynamics.