Dynamic measurement of the J integral in ductile metals: Comparison of experimental and numerical techniques

Alan T. Zehnder*, Ares J. Rosakis, Sridhar Krishnaswamy

*Corresponding author for this work

Research output: Contribution to journalArticle

26 Scopus citations

Abstract

Experiments and analyses designed to develop an extension of the method of caustics to applications in dynamic, elastic-plastic fracture mechanics are described. A relation between the caustic diameter, D, and the value of the J integral was obtained experimentally and numerically for a particular statically loaded specimen geometry (three point bend) and material (4340 steel). Specimens of the same geometry and material were then loaded dynamically in impact. The resulting caustics, recorded using high speed photography, were analyzed on the basis of the J versus D relation to determine the time history of the dynamic value of J, Jd(t). The history of Jdthus obtained is compared with good agreement to an independent determination of Jd(t) based on a two-dimensional, dynamic, elastic-plastic finite element analysis, which used the experimentally measured loads as traction boundary conditions.

Original languageEnglish (US)
Pages (from-to)209-230
Number of pages22
JournalInternational Journal of Fracture
Volume42
Issue number3
DOIs
StatePublished - Mar 1 1990

ASJC Scopus subject areas

  • Computational Mechanics
  • Modeling and Simulation
  • Mechanics of Materials

Fingerprint Dive into the research topics of 'Dynamic measurement of the J integral in ductile metals: Comparison of experimental and numerical techniques'. Together they form a unique fingerprint.

Cite this