Prediction of ductile fracture toughness

J. S. Wang*, Gregory B Olson

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Inspired by recent multiscale modeling of void/microvoid interaction in ductile fracture, a new analysis of literature data on ultrahigh strength martensitic steels shows that JIC toughness normalized by primary inclusion mean spacing is parabolically related to the measured critical primary void size ratio. Interpreting this critical ratio as a measure of the critical intervoid ligament strain for primary void coalescence by finer scale microvoid instability, calculation of the critical strain from Rice-Tracey void growth shows that JIC toughness is exponentially related to the critical microvoid instability strain. This represents a far stronger sensitivity to critical strain than the previously assumed linear scaling. An approximate correlation of this critical strain to macroscopic fracture ductility allows an estimate of fracture toughness.

Original languageEnglish (US)
Title of host publication12th International Conference on Fracture 2009, ICF-12
Pages145-154
Number of pages10
Volume1
StatePublished - Dec 1 2009
Event12th International Conference on Fracture 2009, ICF-12 - Ottawa, ON, Canada
Duration: Jul 12 2009Jul 17 2009

Other

Other12th International Conference on Fracture 2009, ICF-12
CountryCanada
CityOttawa, ON
Period7/12/097/17/09

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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