Creep failure in a threshold-activated dynamics: Role of temperature during a subcritical loading
Peer reviewed, Journal article
MetadataShow full item record
Original versionPhysical Review Research (PRResearch). 2020, 2 (2), . 10.1103/PhysRevResearch.2.023104
Creep is a time-dependent deformation of solids at relatively low stresses, leading to the breakdown with time. Here we propose a simple model for creep failure of disordered solids in which temperature and stress are controllable. Despite its simplicity, this model can reproduce most experimental observations: Distribution of the creep lifetime obeys the log-normal distribution, and the average creep lifetime decays in a scale-free manner with the increasing stress. Finally, to characterize the failure abruptness, the average breakdown frequency is introduced as an order parameter, which exhibits a series of jumps with varying temperature. Finite-size scaling holds for these jumps, implying the existence of nonequilibrium transitions.