cyclic loading

A statement of the coupled thermomechanical problem on forced resonant vibrations and dissipative heating of hinged viscoelastic elastomeric rectangular plate is given with account of prestresses applied.  The statement is based on the standard Kirchhoff-Love hypotheses and concept of complex characteristics that are used to describe the viscoelastic material response to harmonic loading.  Both steady-state and transient thermal response is investigated.  Influence of the prestress is studied in details for both uniaxial and biaxial preliminary stresses applied.  Dissipative heating tempera

The presence of fatigue cracks on the surface of metallic underground pipelines sharpens the problem of calculation values of strength characteristics at the action of corrosive environments, that did not find the complete decision nowadays. In this connection it is needed to correct the row of defects and normative and technical documents related to insufficient actuality of corresponding.

This work is devoted to questions of technological cyclic durability maintenance, of the material for parts working under cyclic loading conditions, by lathe processing optimization. The analysis of the impact of the surface layer quality on fatigue characteristics is described for parts operating under cyclic loads. Survey of methods for evaluating cyclic durability is completed, which showed lack of information about the mathematical relation between the cyclic durability of the part’s material and technological conditions of its production.