Repeated yield drop phenomenon: a temporal dissipative structure

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Abstract
Based on well known mechanisms, the authors set up a system of coupled nonlinear rate equations for the densities of three types of dislocations, namely, the mobile, the immobile and those with clouds of solute atoms, and for the load sensed by the load cell. For a range of values of the parameters, these equations admit periodic solutions called limit cycles, leading to repeated yield drops. The model exhibits many experimentally observed features. The new temporal order is an example of a dissipative structure.

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