A Mechanics Mode for the Compressive Response of Fiber Reinforced Composites

Abstract

This article presents a model for the uni-axial compressive response of uni-directionally reinforced fibrous composite. The model accounts for the non-linear shear response and the failure strain of the matrix, incorporating both aspects into a non-linear field equation which governs the load-deflection process. In addition, the model considers the effects of two kinds of geometric imperfections, namely, initial fiber waviness and random fiber spacing. It is shown that under uni-axial compression random fiber spacing may instigate the formation of severe transverse loadings on the fibers, which suggest the existence of a transitional mechanism from micro-buckling to micro-kinking. Computational results are presented which illuminate the effects of several material and geometric factors on the compressive strength of composites.

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Document Details

Document Type
Technical Report
Publication Date
Mar 29, 1994
Accession Number
ADA278866

Entities

People

  • I. Chung
  • Y. J. Weitsman

Organizations

  • University of Tennessee

Tags

DTIC Thesaurus Topics

  • Buckling
  • Composite Materials
  • Compressive Strength
  • Computational Science
  • Differential Equations
  • Engineering
  • Equations
  • Failure Mode And Effect Analysis
  • Fiber Reinforced Composites
  • Laminates
  • Materials
  • Materials Science
  • Materials Testing
  • Mechanical Properties
  • Mechanics
  • Shear Stresses
  • Stresses

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Reinforced Composite Materials
  • Systems Analysis and Design

Technology Areas

  • Space