Autowave Features of Plastic Deformation by Ductile Fracture

Abstract:

The kinetics of fracture was examined for a wide range of metallic materials. Using speckle photography technique, displacement vector fields were recorded for the deforming sample. The deformation localization is an autowave process, which manifests macroscopic inhomogeneities from yield point to necking. This involves a changeover in the autowave types: phase autowave stationary dissipative structure propagating autowave collapse of autowave. The loading curves obtained for all studied materials have a similar autowave pattern emerging at the pre-fracture stage, no matter what is crystalline or microstructural state of material. Using experimental data on the kinetics of autowave collapse, the space-time coordinates of failure can be predicted for the object under load long before symptoms of fracture are detected visually.

• Periodical: Key Engineering Materials (Volumes 592-593)
• Pages: 664-667
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.592-593.664
• Online since: November 2013
• Authors: Dina Orlova, Vladimir Danilov, Lev B. Zuev
• Keywords: Failure, Macrolocalization, Plastic Deformation, Stages of Flow Curve

References

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