THE MECHANICS OF DAMAGE ACCUMULATIONS KINETICS IN STRUCTURAL MATERIALS AT A WORK
DOI:
https://doi.org/10.20535/2305-9001.2012.64.44366Keywords:
Damage tensor, Intensity of damageability, elastoplastic deformation, form change, volume changeAbstract
Purpose. At the present time, much attention is given to the problem of reliable prediction of the life of structural materials in designing plastic shaping processes and operating the critical structural elements of modern machinery of the machine-building complex at the design stage and of remaining life at the operation stage. Design/methodology/approach The tensor of accumulation of damages is in-process examined on the change of volume of the selected unit element of construction material at the elastoplastic loading, which is transformed by degradation of physicalmechanical properties of material at work. Findings. Scattered damage accumulation under proportional loading were compared with the experimental data obtained for 12Cr18Ni10Ti and 07Cr16Ni6 steels. The laws governing the kinetics of scattered damage accumulation were obtained by two method: electrical resistivity variation and elastic modulus variations. Originality/value. Presented lifetime prediction method for structural materials elements under complex stress state with damageReferences
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