In this paper,the strain of twist compression deformation is analyzed and the formulae are derived in detail,furthermore,some numerical results are given.

The compression-torsion forming technology has been used in preparing ultra-fine grain material.

Conditions of Effect of Screw Torsion Deformation to Transmission Rigidity;

Bar DZ4 specimens after torsion deformation were heat treated at 1220℃for 4 hours in order to obtain recrystallization layer at the surface,and low cycle fatigue property experiments to the specimens after heat treatment were carded out.

By the thin shell theory the fundamental equations for axisymmetrical torsional deformation Of conical shells are investigated, the analytical formulas of stresses and displacements are derived, and for the truncated conical shell with rigid roof under the torsional couples an exact solution is given.

Eccentric loadings will induce large torsional deformations for the girders of long-span bridges,deteriorating the safety and comfort of moving vehicles of rail transit.