The nanoindentation method is becoming increasingly popular for materials characterization, particularly for thin-films, coatings, and other materials that do not easily lend themselves to standard mechanical test methods. However, nanoindentation methods are limited when it comes to their description of a material behavior that deviates from simple elastic or visco-elastic responses. In this paper, we describe a four-parameter constitutive model that has been implemented in a PC-based analysis tool that combines non-linear finite element modeling with data mining gradient-based optimization methods to solve for the unknown parameters from an experimental nanoindentation creep curve. This “VNDM” (virtual nanoindentation and data mining) method, then, is used to complement experimental nanoindentation creep tests for more thorough material characterization. The results verify that the parametric model is capable of describing a wide-range of material behavior, including elastic, visco-elastic, and visco-plastic responses.
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ASME/STLE 2004 International Joint Tribology Conference
October 24–27, 2004
Long Beach, California, USA
Conference Sponsors:
- Tribology Division
ISBN:
0-7918-4181-2
PROCEEDINGS PAPER
Finite Element and Gradient-Based Optimization Tools for Multi-Parameter Nanoindentation Characterization of Materials With Non-Linear Stress/Strain Behavior
Timothy C. Ovaert,
Timothy C. Ovaert
University of Notre Dame, Notre Dame, IN
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Jianjun Wang
Jianjun Wang
ABB Robotics, Inc., Windsor Locks, CT
Search for other works by this author on:
Timothy C. Ovaert
University of Notre Dame, Notre Dame, IN
Jianjun Wang
ABB Robotics, Inc., Windsor Locks, CT
Paper No:
TRIB2004-64352, pp. 87-92; 6 pages
Published Online:
December 22, 2008
Citation
Ovaert, TC, & Wang, J. "Finite Element and Gradient-Based Optimization Tools for Multi-Parameter Nanoindentation Characterization of Materials With Non-Linear Stress/Strain Behavior." Proceedings of the ASME/STLE 2004 International Joint Tribology Conference. ASME/STLE 2004 International Joint Tribology Conference, Parts A and B. Long Beach, California, USA. October 24–27, 2004. pp. 87-92. ASME. https://doi.org/10.1115/TRIB2004-64352
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