The role of annealing in determining the yielding behavior of glasses under cyclic shear deformation

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Abstract
Significance: Understanding the nature of the yielding transition in amorphous solids is of significant interest conceptually and for practical reasons. We use computer simulations of models of silica—a network glass—and an atomic glass to investigate the effect of annealing on yielding under cyclic shear deformation. We identify a threshold energy toward which poorly annealed glasses evolve as yielding is approached under cyclic deformation, and below which glasses display little change until they yield, with progressively stronger discontinuities as degree of annealing increases. The threshold energy thus separates two distinct regimes of yielding, with increasingly brittle behavior at lower energies. Interestingly, the threshold energy corresponds to well-studied dynamical cross-overs in the corresponding liquids.
Funding Information
  • Indo-French Centre for the Promotion of Advanced Research (5704-1)
  • DST | Science and Engineering Research Board (JBR/2020/000015/SSC)
  • Nano Mission Council, Department of Science and Technology (SR/NM/NS-11/2011)
  • National Supercomputing Mission, India (25998)

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