Analysis of a Novel Fracture Toughness Testing Geometry

Abstract

Computational analyses were conducted on novel fracture toughness specimens known as butterfly specimens, which were developed at the U.S. Army Research Laboratory. A three-dimensional (3-D), J-integral technique was established and validated against published results for a simple geometry. The technique was then used to generate a stress intensity factor function for a range of geometries for the butterfly specimen. A displacement-based description of the load on the specimen was developed that removes the need to accurately determine the specimen/platen frictional effects, and 3-D analyses were conducted to elucidate specimen thickness effects and their implications on surface measurements that are taken during experimental studies.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 2012
Accession Number
ADA578377

Entities

People

  • Bryan M. Love

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Crack Tips
  • Displacement
  • Finite Element Analysis
  • Fracture (Mechanics)
  • Geometry
  • Integrals
  • Intensity
  • J Integrals
  • Lepidoptera
  • Materials
  • Measurement
  • Mechanics
  • Military Research
  • Square Roots
  • Stress Intensity Factors
  • Thickness
  • Three Dimensional

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Graph Algorithms and Convex Optimization.
  • Materials Science (Mechanical Engineering).