2017
Particle rearrangement and softening contributions to the nonlinear mechanical response of glasses
Fan M, Zhang K, Schroers J, Shattuck MD, O'Hern CS. Particle rearrangement and softening contributions to the nonlinear mechanical response of glasses. Physical Review E 2017, 96: 032602. PMID: 29346996, DOI: 10.1103/physreve.96.032602.Peer-Reviewed Original ResearchMechanical responseStress lossParticle rearrangementGlass configurationRapid stress dropStress-strain curvesNonlinear mechanical responsePlastic flow regimeStrain curvesSlow cooling rateElastic regimeLarge strainsShear strainSmall strainsFlow regimeBinary Lennard-Jones glassCooling rateNumerical simulationsPure shearStrain directionAmorphous materialsGlassEnergy lossLennard-Jones glassStress dropEffects of cooling rate on particle rearrangement statistics: Rapidly cooled glasses are more ductile and less reversible
Fan M, Wang M, Zhang K, Liu Y, Schroers J, Shattuck MD, O'Hern CS. Effects of cooling rate on particle rearrangement statistics: Rapidly cooled glasses are more ductile and less reversible. Physical Review E 2017, 95: 022611. PMID: 28297989, DOI: 10.1103/physreve.95.022611.Peer-Reviewed Original ResearchParticle rearrangementMechanical responseShear cyclesParticle motionDuctile glassesEnhanced ductilityEnergy lossCumulative energy lossIrreversible particle motionPlastic flowAmorphous solidsLinear regimeApplied deformationElastic responseBinary Lennard-Jones glassCooling rateDuctilityPure shearGlassLennard-Jones glassSolidsColloidal glassesDuctileMotion
2014
Hypocoordinated solids in particulate media
Bertrand T, Schreck CF, O'Hern CS, Shattuck MD. Hypocoordinated solids in particulate media. Physical Review E 2014, 89: 062203. PMID: 25019766, DOI: 10.1103/physreve.89.062203.Peer-Reviewed Original ResearchConceptsInput kinetic energyInterparticle contactsParticle rearrangementGranular mediaContact forceRepulsive contact forcesParticulate systemsHarmonic responseParticulate mediaDegrees of freedomKinetic energyIsostatic valueAverage contact numberFourier transformFraction deviationSolidsFrictionless disks