Determination of tensile strength of brittle materials by bending thin discs on the annular support

摘要

It is proposed to use the test of bending small thin disk specimens simply supported along the contour, to determine the resistance of material to tensile strain.The results of computer analysis of stress-strain state and test a thin disk specimens made of brittle materials are cast iron and graphite as a possible model, and directly samples made by electric pulse methods are presented.It is shown the effect of size of specimens on the resistance to their destruction and different character of deformation and destruction of cast iron and graphite samples.The possibility of application of thin disc samples for the determination the resistance to tensile strain of the composite ceramics based on SiAlON with various additives Y2O3, SiC, and TiN is confirmed.