Verjetnostna študija pojava drobljenja zrn po metodi Weibull

The crushing of grains in a granular medium is a very important phenomenonit is a source of both physical and mechanical changes to these materials. A statistical study of the mechanical properties of a material was used to characterize the distribution and fracture mechanics in order to quantify the evolution of these distributions with sample sizes (grains and whole grains). This work presents the results of an experimental study made on the crushing of individual grains of limestone and samples consisting of multiple grains subjected to a uniaxial loading in order to highlight the influence of the loading and the grain size on the rate of crushing. A statistical study using the Weibull method allowed us to model the problem and quantify the rate of breakage for the two cases. The results obtained show that the rate of deflection depends on the grain size and the intensity of the applied load. Statistical modelling using the Weibull method gave us acceptable results in both cases.Drobljenje zrn v pesek je pomemben postopek, ker povzroča fizikalne in mehanske spremembe materialov. Za določitev mehanskih sprememb je za porazdelitev zrn uporabljena statistična metoda, za določitev razvoja porazdelitve zrn (lomljenih in celih) v vzorcih pa mehanika loma. Delo je rezultat eksperimentalne študije drobljenja posameznih zrn apnenca ter večzrnatih vzorcev, ki so bili podvrženi enoosni obremenitvi, s čimer se je ugotovilo vpliv obremenitve in velikosti zrn na odnos lomljenja. S statistično metodo Weibull je problem modeliran in določen je odnos lomljenja za oba primera. Izsledki študije so pokazali, da je ocena odklona odvisna od velikosti zrn in jakosti obremenitve. Statistično modeliranje po metodi Weibull pa je v obeh primerih dalo zadovoljive rezultate