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Creep and Durability at Non-stationary Loading and Heating

  • Boris F. ShorrEmail author
Chapter
Part of the Foundations of Engineering Mechanics book series (FOUNDATIONS)

Abstract

In this chapter, the most validated experimental data for creep and durability of structural materials subjected to unsteady loading and heating are presented. The effect of heredity and adaptability on the material deformation hardening under uni- and multi-axial stress states is demonstrated. A vector theory of stabilized anisotropic-ray hardening (the SARH theory) of a material considering non-isothermal creep under arbitrary loadings, including non-proportional ones, is formulated. The theory is based on the experimentally justified concept of directed and stabilized nature of creep deformation hardening. It develops the results of previous publications on the subject. The design model reveals prominent features of non-steady creep, such as increase in rate of strain development after repeated loadings, spatial variation of the strain rate evolution at rotation of the stress tensor with or without unloading, subsequent stabilizing of the creep rate along a new direction, complete or partial creep inhibition under unloading, and aftereffect. A quasi-steady version of the theory takes into consideration the overall effect of rapid variation of operating regimes on creep evolution.

Keywords

Creep Rate Creep Strain Stress Vector Creep Process Proportional Loading 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.Central Institute of Aviation Motors (CIAM)MoskvaRussia

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