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Experimental study of the low-cyclic fatigue under variable parameters of cycle at various temperatures and types of loading

Name
Valerii
Surname
Wildemann
Scientific organization
Perm National Research Polytechnic University
Academic degree
Doctor of Physics and Mathematics
Position
Professor
Scientific discipline
Machinery & Energy
Topic
Experimental study of the low-cyclic fatigue under variable parameters of cycle at various temperatures and types of loading
Abstract
The work is devoted to experimental study of the low-cyclic fatigue of structural steels and aluminum alloys under variable parameters of cycle. Test results of uniaxial tension-compression, proportional and complex tension with torsion at room and high temperature are obtained in the project.
Keywords
low-cyclic fatugue, tension, tension-torsion, complex loading
Summary

Uniaxial tension tests were carried out on Instron 8801 servohydraulic test system (maximum load of tension and compression is 100 kN, cyclic tests with frequency up to 30 Hz) with using of axial extensometer Instron 2620-601. Biaxial tension-torsion tests were carried out on Instron 8850 biaxial servohydraulic test system (maximum load of tension and compression is 100 kN, maximum torque is 1000 Nm, cyclic tests with frequency up to 30 Hz) with using of biaxial (tension with torsion) extensometer Epsilon 3550-010M and Epsilon 3550HT-025M.

In tests were used solid cylindrical and thin-walled tubular specimens of structural steels and aluminum alloy. Triangle and M-shape cycles and block loading were realized in the uniaxial and biaxial tests. In the complex tests under tension and torsion, the trajectories with bend in axis of axial strain and shear angle were used.