Fracture model for cemented aggregates

Aleksander Zubelewicz, Darla G. Thompson, Martin Ostoja-Starzewski, Axinte Ionita, Devin Shunk, Matthew W. Lewis, Joe C. Lawson, Sohan Kale, Seid Koric

Research output: Contribution to journalArticlepeer-review


A mechanisms-based fracture model applicable to a broad class of cemented aggregates and, among them, plastic-bonded explosive (PBX) composites, is presented. The model is calibrated for PBX 9502 using the available experimental data under uniaxial compression and tension gathered at various strain rates and temperatures. We show that the model correctly captures inelastic stress-strain responses prior to the load peak and it predicts the post-critical macro-fracture processes, which result from the growth and coalescence of micro-cracks. In our approach, the fracture zone is embedded into elastic matrix and effectively weakens the material's strength along the plane of the dominant fracture.

Original languageEnglish (US)
Article number012119
JournalAIP Advances
Issue number1
StatePublished - Jan 2013

ASJC Scopus subject areas

  • General Physics and Astronomy


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