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Definition of the kinetic equation form for damage under the plastic deformation
Author(s) -
SMIRNOV S. V.,
DOMILOVSKAYA T. V.
Publication year - 2003
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1046/j.1460-2695.2003.00624.x
Subject(s) - materials science , deformation (meteorology) , work (physics) , intensity (physics) , hydrostatic equilibrium , hydrostatic stress , plasticity , exponential function , metal , stress (linguistics) , hydrostatic pressure , composite material , mechanics , thermodynamics , metallurgy , finite element method , mathematics , physics , philosophy , quantum mechanics , mathematical analysis , linguistics
Plastic deformation of metals leads to the residual variation of the volume of the metal due to the appearance and growth of deformational defects. This process is known as ‘defect accumulation’. The intensity of this process depends on the metal properties and loading parameters. This work is concentrated first of all with experiments, used to set up the physically substantiated model of damage accumulation under complex stress states. A special technique allowed the loading of the specimens under various superimposed hydrostatic pressures (0.1–800 MPa) to simulate the process of damage accumulation under a wide range of stress states. The metal density was chosen as the characteristic of damage. The experiments support hypotheses of a linear dependence between the damage accumulation intensity and the controlling stress state index, and an inverse exponential dependence of the critical damage accumulation.