Determining the influence of irradiation swelling on creep and damage in elements with orthotropic material properties

This paper reports a method that numerically models the deformation and accumulation of hidden damage in structural elements are an inhomogeneous thermal field exposed to radiation. Materials considered those exhibiting orthotropy (transversal isotropy) long-term properties. The problem is stated as boundary – initial value one. To solve it, finite element initial-difference time integration used. simulate anisotropy process damage, tensor applied. development irradiation swelling strains described using equation for limited temperature range specific fluence value. results numerical modeling creep plates tension with circular notches, which field, considered. material titanium alloy VT1-0. It was found effect significantly, up 6‒7 %, increases level plate. Radiation by almost 4 times, reduces until completion fracture plates. radiation properties leads redistribution areas significant values. has been established also qualitatively changes nature distribution maximum plate, extends fairly large area. Such due additional on rate general irreversible stresses