An Investigation of Viscoelastic Fracture near and at Interfaces

Abstract

This report summarizes research on the effect of interfaces between two materials on the crack propagation process in its vicinity. The program contained both experimental as well as analytical components. The aim was to examine the applicability of optical caustics to crack propagation near interfaces. The main result of the work to date is the assurance that caustics can be employed to characterize interfacial cohesion and decohesion problems when crack tips are involved. On the experimental side of the program the method to generate bimaterial specimens with a plane interface has been developed and caustics involving large deformations have been studied and related to analysis.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1988
Accession Number
ADA203760

Entities

People

  • Wolfgang G. Knauss

Organizations

  • California Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aerospace Industry
  • Chemical Reactions
  • Classification
  • Crack Propagation
  • Crack Tips
  • Cracks
  • Creep
  • Data Analysis
  • Elastic Properties
  • Materials
  • Mechanical Properties
  • Mechanics
  • Optical Properties
  • Physical Properties
  • Propellants
  • Solid Propellants
  • Stress Intensity Factors

Readers

  • Materials Science (Mechanical Engineering).
  • Systems Analysis and Design