Journal
FINITE ELEMENTS IN ANALYSIS AND DESIGN
Volume 60, Issue -, Pages 64-71Publisher
ELSEVIER
DOI: 10.1016/j.finel.2012.05.007
Keywords
Crystal plasticity; Surface roughness; Surface deformation; Finite element
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Funding
- National High Technology Research and Development Program of China [2007AA04Z404]
- National Nature Science Fund of China [50775183, 50805118]
- Aeronautical Science Foundation of China [2010ZA53013]
- Open Funds of Key Laboratory of Advanced Design and Intelligent Computing (Dalian University), Ministry of Education, China [ADIC2010007]
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The crystal plasticity was implemented into finite element (FE) analysis to study the surface deformation on the rough surface of polycrystal under fatigue loading. The cosine profile was employed to simulate the fractal behavior on the surface of materials. Different levels of surface roughness as well as applied repeated loads were considered to explore the evolution of surface deformation. The FE results show that the initial surface roughness is reduced by the plastic deformation of the polycrystal. However, the surface roughness causes stress localization at the concave of the rough surface, where micro-cracks will preferentially form. The surface deformation linearly increases with the increasing loading cycles. The surface deformation rate exhibits an exponential dependence on the applied load. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.
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