Toughening by Aligned, Frictionally Constrained Fibers

Abstract

The Mode-I fracture toughness of a brittle material reinforced by aligned brittle fibers is studied theoretically. The fibers are assumed to slip relative to the matrix when a critical interface shear stress is reached, and the toughening action of the fibers is presumed to be due to bridging of crack faces in the vicinity of the crack front. The toughening due to the fiber reinforcement is related to basic parameters associated with the related problem of steady-state matrix cracking in the presence of intact fibers. Bridge lengths at fracture and fracture resistance curves are calculated. Keywords: Fiber reinforced composites, Matrix materials, Crack propagation.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1988
Accession Number
ADA197194

Entities

People

  • Bernard Budiansky
  • John C. Amazigo

Organizations

  • Harvard University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Composite Materials
  • Crack Propagation
  • Crack Tips
  • Equations
  • Fiber Reinforced Composites
  • Fiber Reinforcement
  • Integral Equations
  • J Integrals
  • Materials
  • Mechanics
  • Modulus Of Elasticity
  • Resistance
  • Steady State
  • Stress Concentration
  • Stress Intensity Factors
  • Stress Strain Relations
  • Stresses

Readers

  • Materials Science (Mechanical Engineering).
  • Optical Fiber Sensing and Electromagnetic Propagation.
  • Structural Dynamics.