A Mechanics Model 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 incorporates the non-linear shear response and the failure strain of the matrix, accounting for both aspects within 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
May 01, 1993
Accession Number
ADA265556

Entities

People

  • I. Chung
  • Y. J. Weitsman

Organizations

  • University of Tennessee

Tags

DTIC Thesaurus Topics

  • Accounting
  • Buckling
  • Classification
  • Composite Materials
  • Compression
  • Compressive Strength
  • Computational Science
  • Deflection
  • Differential Equations
  • Distribution Functions
  • Equations
  • Failure Mode And Effect Analysis
  • Fiber Reinforced Composites
  • Laminates
  • Materials
  • Mechanics
  • Stress Strain Relations

Readers

  • Computational Modeling and Simulation
  • Materials Science (Mechanical Engineering).
  • Reinforced Composite Materials

Technology Areas

  • Space