Nanostructural scaling effect in fracturing homogeneous solids

摘要: The scaling effect (power law dependence of number newly-formed damages on damage size) during fracturing is inherent in heterogeneous materials, such as composites, concrete, rocks, etc., which multi-site damaging takes place. Fracturing brittle homogeneous materials do not exhibit this phenomenon due to the lack pre-failure accumulation at microscopic scale level. This work determine role structural heterogeneity process primary defect nucleation occurring conventional materials. We present highly resolved time series fractoluminescence (FL) emitted multiple chemical bond breakage shock-damaged silica glass and single crystals \(\upalpha \hbox {-SiO}_{2}\) {-SiC}\). statistical analysis has shown that energy distributions FL pulses followed power indicative long-range interactions between events. caused by multiplicity newly formed damaged sites level heterogeneity. At same time, larger formation reflected acoustic emission did presence growing cracks.