Viscoelastic Effect on Dynamic Crack Propagation in Homalite 100,

Abstract

The optical method of caustics is used to determine the stress intensity factor for a running crack in a viscoelastic material. A formulation of the quasi-static deformation of materials with rheologically simple shadow-optic creep functions is derived for the caustics, solved numerically and applied to the fracture testing of Homalite-100 at various temperatures (40 deg C - 100 deg C). Theoretical and experimental caustics show good agreement in shape even for moderately high crack speeds (150 - 300 m/sec). Results also show that the relation between the stress intensity factor and the crack speed for Homalite 100 is highly sensitive to temperature variations. (Author)

Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1983
Accession Number
ADP003115

Entities

People

  • K. L. Dickerson
  • Ki‐Seok Kim
  • W. G. Knauss

Organizations

  • University of Illinois Urbana–Champaign

Tags

DTIC Thesaurus Topics

  • Agreements
  • California
  • Caustics
  • Crack Propagation
  • Cracks
  • Creep
  • Intensity
  • Materials
  • Mechanical Properties
  • Physical Properties
  • Stress Intensity Factors
  • Stresses

Readers

  • Materials Science (Mechanical Engineering).
  • Mechanical Engineering/Mechanics of Materials.