Computer simulations of fatigue failure in glasses

Srikanth Sastry (JNCASR)

Sep 13. 2024, 10:30 — 11:00

Solids can fail when subjected to repeated deformations or stresses. Failure is not observed below a fatigue limit, whereas
above, the the number of cycles, or time, to failure is a strong function of the deformation/stress amplitude. We perform computer simulations of a model glass subjected to cyclic shear deformation, to investigate fatigue failure. The failure times diverge as a power law as the cyclic shear yielding point is approached from above, with strong dependence of the degree of annealing. The dissipated work during the cycles of before failure have a striking relationship to the failure times. These results, along with attempts to rationalise them, are presented.

Further Information
Venue:
ESI Boltzmann Lecture Hall
Associated Event:
Linking Microscopic Processes to the Macroscopic Rheological Properties in Inert and Living Soft Materials (Thematic Programme)
Organizer(s):
Roberto Cerbino (U of Vienna)
Emanuela Del Gado (Georgetown U)
Giuseppe Foffi (Paris-Saclay U)