Mietielov V. Short-time orthotropic creep under plane stress state

The statement of the twodimensional problem of orthotropic creep with orthotropic properties of material damage under static and periodic loading is presented. Experimental investigations of short-term deformation at a uniaxial and plane stress state are carried out. . Static and periodic loading is applied. Short-term creep curves were obtained for uniaxial specimens and plates with holes. State equations are developed for materials characterized by the first stage of unsteady creep with orthotropic properties under static and periodic loading. The analysis of reliability is made comparing calculation results with experimental data. The method, algorithms and program complex are improved for the twodimensional creep problems. Research reliability of the calculation method in general are confirmed by comparing numerical and experimental results at the uniaxial and plane stress state. New regularities were obtained using numer ical modeling and expe riments. They are ansteady creep under static and periodic loading, creep and the creep-induced hidden damage of the titanium plate with a central hole; deformation of rectangular steel sheets during rolling . . .