Stress-Strain Behavior and Failure Uniaxial Composites in Combined Compression and Shear - II.

Abstract

This paper presents a theoretical approach to the problem of finding the stress-strain relations for composites under combined compression and shear. To this end, the 1-element model, presented in Part I of this paper, is replaced by a 2-element model. Both elastic and inelastic composites are explored employing graphical methods. A numerical example is worked out to illustrate the effects of combined loads on the stiffness and strength of a composite. The present theory employs a nonlinear algebraic equation. An alternative approach would be to use a linear incremental theory, leading to a linear differential equation. An analysis is offered to show that the latter approach leads to substantially the same results as the 1-element model. Keywords: Stress-strain relations; Unidirectional composites; Mechanics of failure; Combined compression and shear; Geometric nonlinearity; Material nonlinearity; Carbon-carbon composites; Initial misalignment; Kinking.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1985
Accession Number
ADA163477

Entities

People

  • Robert W. C. Ko
  • Samuel B. Batdorf

Organizations

  • University of California, Los Angeles

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Carbon Carbon Composites
  • Composite Materials
  • Compression
  • Compressive Strength
  • Coordinate Systems
  • Differential Equations
  • Equations
  • Fibers
  • Linear Differential Equations
  • Materials
  • Mechanics
  • Misalignment
  • Shear Stresses
  • Stiffness
  • Stress Strain Relations
  • Stresses

Fields of Study

  • Engineering

Readers

  • Calculus or Mathematical Analysis
  • Mechanical Engineering/Mechanics of Materials.
  • Structural Health Monitoring of Composite Structures.