Creep in materials with different tension and compression behavior

Experimental data on creep in tubular specimens loaded in tension and in compression are cited. It is demonstrated experimentally that the resulting vector of the creep strain rates is orthogonal to the curve of constant scattering intensity. Approximate analytical formulas making it possible to describe the creep process undergone by materials having different behavior patterns in tensile and compressive loading are derived.Translated from Zhurnal Prikladnoi Mekhaniki i Tekhnicheskoi Fiziki, No. 5, pp. 136–139, September–October, 1970.