Calculation of Creep Strains of Thin-Walled Tubular Members Made of Linear Viscoelastic Materials Under Tension and Torsion

The problem of analysis of creep strains in thin-walled tubular elements made of linearly viscoelastic materials under uniaxial tension, pure torsion, and combined tension with torsion is solved and experimentally validated. The analysis is based on the use of viscoelasticity models in the form of proportionality of deviators. The creep kernels are represented by fractional-exponential functions. The longitudinal, transversal, shear, and volume creep strains are calculated.