Mirsalimov Vagif M Russia Azerbaijan Technical University, Azerbaijan, AZ1073, Baku, Hussein Javid prosp., 25 Профессорmir-vagif@mail.ru Author's articles Modelling of Cracking in Circular Disk Loaded by Concentrated Forces Slot of Variable Width in a Hub of Friction Pair Simulation of Partial Closure Crack-Visible Cavities in Burning Solid Fuel Under the Influence of Body Forces