Some aspects of the damage kinetics at static loading of a heterogeneous solid under the conditions of constrained deformation

Abstract

The damaging kinetics of a composite system subjected to static loading, which simulates an inhomogeneous body with microductility, and of D16T–B(43%) composite simulating a quasi-brittle solid is analyzed with the acoustic emission method. By using laser interferometry, it is shown on a model sample that mesocracking may cause a short-term change in the plastic strain rate, which two or more orders of magnitude exceeds the change in the creep rate during the usual supramolecular structure reconfiguration. Whether the object will remain functional or acquire damage of the next scale after being subjected to such local “impact” loading depends on the ability of its immediate environment to absorb released energy.