Abstract
Residual stresses of the multilayer composite disks produced by a powder metallurgical process were calculated by classical analytical techniques and finite element method. The layer composites have a structure of SiC/SiC+TiC/TiC/TiC+Ni/Ni system in which the thermal expansion coefficient increases in the order of SiC<TiC<Ni. Large tensile stresses are noteworthy in or near SiC layer in the direction parallel to interface, and over the range of SiC to TiC in the perpendicular direction along free edge. These calculations explain cracking in ceramic part of the layer composite. The stresses decrease with an increase in the number of mixture layers, according to which cracking was prevented. The two calculation methods give the similar results.
