Surface irregularities as sources for corrosion fatigue

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Surface irregularities as sources for corrosion fatigue

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Publication Conference Paper, peer reviewed
Title Surface irregularities as sources for corrosion fatigue
Author(s) Jivkov, Andrey
Date 2003
English abstract
Corrosion fatigue crack nucleation from surface irregularity is modelled as a moving boundary value problem. The model is based on material dissolution proportional to the surface stretch. Dissolution and repassivation processes are forming the geometry of the crack tip, thus creating conditions for strain concentration. No crack growth criterion is used. The interaction between the electrochemical processes and the deformation of the crack tip region is incorporated in continuum mechanical theory. Elastic-perfectly plastic materials under low frequency cyclic load are considered. The model simulates how cracks form and grow in a single continuous process. The resulting natural variation of lengths of the formed cracks makes them grow with different rates. One crack after another falls into a wake behind a larger crack and the crack tip load of the smaller decreases leading to its arrest.
Host/Issue Mesomechanics of computation and design of use-specific materials : simulation and fabrication of advanced materials with mesoscopic structures : Proceeding of the 5th International Conference for Mesomechanics, August 26-28, Tokyo, Japan
Pages p 184-191
Language eng (iso)
Subject(s) Crack evolution
Fatigue corrosion
Moving boundary
Finite elements
Research Subject Categories::TECHNOLOGY
Note 5th International Conference for Mesomechanics, August 26-28 2003, Tokyo, Japan
Handle http://hdl.handle.net/2043/1253 (link to this page)

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