Simultaneous estimation of boundary conditions and material model parameters

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dc.contributor.author Jansen van Rensburg, Gerhardus J.
dc.contributor.author Kok, Schalk
dc.contributor.author Wilke, Daniel Nicolas
dc.date.accessioned 2018-03-12T12:00:23Z
dc.date.issued 2018-02
dc.description.abstract Room temperature experimental compression test data is available for different hardmetals. This data indicates the presence of some spatial inhomogeneity due to a compression instability, eccentric loading or time varying equivalent bending moment. To account for this, an inverse analysis is employed that determines not only the constitutive material model parameter values but also the displacement boundary conditions that best replicate the experimental data. The unknown boundary displacement history is approached using a systematically refined piecewise linear approximation, determined alongside material parameter values. The systematic simultaneous estimation of material parameter values and boundary approximations is also investigated using a virtual problem for which the exact solution is known. This investigation confirms that known material parameter values and boundary conditions can be recovered without using any prior knowledge of the exact displacement boundary conditions. en_ZA
dc.description.department Mechanical and Aeronautical Engineering en_ZA
dc.description.embargo 2019-02-12
dc.description.librarian hj2018 en_ZA
dc.description.uri http://link.springer.com/journal/158 en_ZA
dc.identifier.citation Van Rensburg, G.J.J., Kok, S. & Wilke, D.N. Simultaneous estimation of boundary conditions and material model parameters. Structural and Multidisciplinary Optimization (2018). https://doi.org/10.1007/s00158-018-1924-4. NYP. en_ZA
dc.identifier.issn 1615-147X (print)
dc.identifier.issn 1615-1488 (online)
dc.identifier.other 10.1007/s00158-018-1924-4
dc.identifier.uri http://hdl.handle.net/2263/64217
dc.language.iso en en_ZA
dc.publisher Springer en_ZA
dc.rights © Springer-Verlag GmbH Germany, part of Springer Nature 2018. The original publication is available at : http://link.springer.comjournal/158. en_ZA
dc.subject Inverse problem en_ZA
dc.subject Finite element analysis (FEA) en_ZA
dc.subject Parameter identification en_ZA
dc.subject Material model calibration en_ZA
dc.subject Hardmetal compression en_ZA
dc.subject Piecewise linear techniques en_ZA
dc.subject Identification (control systems) en_ZA
dc.subject Compression testing en_ZA
dc.subject Boundary conditions en_ZA
dc.subject Parameter estimation en_ZA
dc.subject Spatial in-homogeneity en_ZA
dc.subject Simultaneous estimation en_ZA
dc.subject Piecewise linear approximations en_ZA
dc.subject Material modeling en_ZA
dc.subject Hard metals en_ZA
dc.subject Displacement boundary conditions en_ZA
dc.subject Constitutive materials en_ZA
dc.subject Boundary approximations en_ZA
dc.title Simultaneous estimation of boundary conditions and material model parameters en_ZA
dc.type Postprint Article en_ZA


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