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The multiscale simulation approach was used to study the mechanical behavior of ceramic parts created by the selective laser sintering (SLS) technology. The goal of the research was studding the difference in the elastic moduli and dynamic strength of ceramic parts, manufactured by the high-temperature sintering and the selective laser sintering. The mechanical properties of ceramic parts were determined by statistic averaging of the results of multi scale computer simulations of representative volumes of materials under loadings. It was shown that the probability of the fracture of such parts under dynamic loading depends on the time history evolution of the distribution of local values of specific internal energy and the damage parameter on the mesoscale level. It was found that the stress threshold of the dynamic fracture beginning of ceramic bodies depends on the distribution of the pore sizes and not just on the average porosity.

SIMULATION OF MECHANICAL PROPERTIES OF CERAMIC PARTS PRODUCED BY ADDITIVE TECHNOLOGIES IN WIDE RANGE OF LOADING RATES