Fast fracture in slow motion

Ariel Livne*, Gil Cohen, Jay Fineberg

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

We present recent results of fracture experiments in polyacrylamide gels. Polyacrylamide gels are soft polymer materials in which the characteristic sound speeds are on the order of a few meters/sec - thereby slowing down fracture dynamics by 3 orders of magnitude. We first demonstrate the universality of rapid fracture dynamics, comparing dynamics observed in gels with those seen in "classic" brittle materials such as glass. Among the common features are the appearance and form of branching instabilities as well as characteristic attributes of the resulting fracture surface that provide evidence for crack front inertia when translational invariance along the front is broken. We then demonstrate a number wholly new aspects of the fracture process, whose study is only made possible by utilizing the "slow motion" inherent in the fracture of these materials. These include both a new oscillatory instability at about 90% of the Rayleigh wave speed and measurements of the nonlinear zone at the tip of dynamic cracks.

Original languageAmerican English
Title of host publication2008 Proceedings of the 9th Biennial Conference on Engineering Systems Design and Analysis
Pages521-527
Number of pages7
StatePublished - 2009
Event2008 9th Biennial Conference on Engineering Systems Design and Analysis - Haifa, Israel
Duration: 7 Jul 20089 Jul 2008

Publication series

Name2008 Proceedings of the 9th Biennial Conference on Engineering Systems Design and Analysis
Volume1

Conference

Conference2008 9th Biennial Conference on Engineering Systems Design and Analysis
Country/TerritoryIsrael
CityHaifa
Period7/07/089/07/08

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