Modeling failure waves in brittle materials

H. D. Espinosa*

*Corresponding author for this work

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

2 Scopus citations

Abstract

In an attempt to elucidate the failure mechanism responsible for the so-called failure waves in glass, numerical simulations of plate impact experiments, with a microcracking multiple-plane model, have been performed. These simulations show that the failure wave phenomenon can be modeled by propagating surfaces of discontinuity from the specimen surface to its interior. Lateral stress increase, reduction of spall strength, and progressive attenuation of axial stress behind the failure front are properly predicted by the multiple-plane model. Numerical simulations of high strain rate pressure shear experiments indicate the model predicts reasonably well the shear resistance of the material at strain rates as high as 1×106/sec. The agreement is believed to be the result of the model capability in simulating damage-induced anisotropy. By examining the kinetics of the failure process in plate experiments, we show that the progressive glass spallation in the vicinity of the failure front and the rate of increase in the lateral stress are more consistent with a representation of inelasticity based on shear-activated faults (narrow shear lines) and microcracking, rather than pure microcracking.

Original languageEnglish (US)
Title of host publicationInternational Conference on Structures Under Shock and Impact, SUSI
PublisherComputational Mechanics Inc
Pages449-458
Number of pages10
StatePublished - Jan 1 1996
EventProceedings of the 1996 4th International Conference on Structures Under Shock and Impact, SUSI 96 - Udine, Italy
Duration: Jul 1 1996Jul 1 1996

Other

OtherProceedings of the 1996 4th International Conference on Structures Under Shock and Impact, SUSI 96
CityUdine, Italy
Period7/1/967/1/96

ASJC Scopus subject areas

  • Engineering(all)

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