Abstract
1. For the high-strength alloy steel and D16T and VT6 alloys with the selected cycle of block loading, the character of accumulation of damages is close to the linear rule. 2. Both in the original condition and after preliminary cyclic loading, the studied constructional materials are anisotropic. Higher resistance to plastic deformation is characteristic of the steel and D16T alloy in the axial direction and of VT6 alloy in the tangential direction. 3. The generalized strain curves of the materials in stress intensity vs strain intensity coordinates are not invariant to the form of stressed state. 4. The influence of preliminary block cyclic loading on the resistance and general rules of deformation of materials under conditions of the complex stressed state is insignificant. At the same time, the resistance to plastic deformation of the steel decreases, while that of D16T and VT6 alloys increases, and the anisotropy of the materials decreases somewhat. The change in anisotropy of the materials is apparently related to the decrease in residual stresses as the result of preliminary cyclic loading.
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