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Numerical analysis of plastic deformation in metal-ceramic nanolayers during cyclic indentation

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1928/20973

Numerical analysis of plastic deformation in metal-ceramic nanolayers during cyclic indentation

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dc.contributor.author Blada, Caroline Bolton
dc.date.accessioned 2012-08-27T20:37:00Z
dc.date.available 2012-08-27T20:37:00Z
dc.date.issued 2012-08-27
dc.date.submitted July 2012
dc.identifier.uri http://hdl.handle.net/1928/20973
dc.description.abstract The indentation behavior of metal/ceramic nanolayered composites is studied nu- merically using the finite element method. Attention is devoted to cyclic response under fixed maximum and minimum loads, with the primary objective of examining the evolving plastic deformation in the ductile metal constrained by the hard ceramic layers. An axisymmetric model consisting of alternating aluminum (Al) and silicon carbide (SiC) thin films on a silicon (Si) substrate is indented by a conical diamond indenter. In this study, both rate-independent and rate-dependent plasticity models are considered. It is found that, in the multilayered material plastic deformation in the Al layers continues to occur upon unloading and subsequent loading /unloading operations. The cyclic plasticity results in an open load-displacement loop, and the indenter continues to move deeper with each cycle. For the control model of a homogeneous Al film, there is no hysteresis loop and transient behavior soon approaches stabilization, showing repetitive elastic loading/unloading. The modeling results are also compared with cyclic nanoindentation experiments conducted on the same metal-ceramic multilayer system and control specimen. The modeling results are in qualitative agreement with the actual cyclic nanoindentation experiment conducted on the Al/SiC nanolayers. en_US
dc.language.iso en_US en_US
dc.subject nanoindentation en_US
dc.subject ABAQUS en_US
dc.subject.lcc Deformation (Mechanics) en_US
dc.subject.lcc Plasticity. en_US
dc.subject.lcc Nanocomposites (Materials) en_US
dc.title Numerical analysis of plastic deformation in metal-ceramic nanolayers during cyclic indentation en_US
dc.type Thesis en_US
dc.description.degree Mechanical Engineering en_US
dc.description.level Masters en_US
dc.description.department University of New Mexico. Dept. of Mechanical Engineering en_US
dc.description.advisor Shen, Yu-Lin
dc.description.committee-member Khraishi, Tariq
dc.description.committee-member Leseman, Zayd


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