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Browsing by Author "Jansen van Rensburg, Gerhardus J"

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Automatic selective feature retention in patient specific elastic surface registration

Author: Jansen van Rensburg, Gerhardus J ; Kok, S Date: Jan 2011 The accuracy with which a recent elastic surface registration algorithm deforms the complex geometry of a skull is examined. This algorithm is then coupled to a line based algorithm as is frequently used in patient specific feature registration. ... Read more
Comparison of numerical results between related shapes using a non-rigid mapping with statistical quantication of uncertainty

Author: Jansen van Rensburg, Gerhardus J ; Wilke, DN ; Kok, S Date: Oct 2011 In the present study, numerical results obtained on different but related shapes are compared by using a non-rigid mapping. Non-rigid registration is employed to obtain mesh representations of different human skull geometries with the same ... Read more
Cyclic effects and recrystallisation in temperature and rate dependent state variable based plasticity

Author: Jansen van Rensburg, Gerhardus J ; Kok, S ; Wilke, DN Date: Oct 2016 A constitutive model that captures the dominant strengthening and softening physics or microstructural changes of metallic materials is needed within a numerical environment for the effective prediction and simulation of plasticity during hot ... Read more
Development and implementation of state variable based user materials in computational plasticity

Author: Jansen van Rensburg, Gerhardus J Date: Sep 2016 The Finite Element Method is a powerful tool that can be used to test, improve or better understand an industrially relevant problem. There are numerous Finite Element Analysis (FEA) software packages that operate either in the commercial, ... Read more
Improved accuracy considerations in Radial Basis Function surrogate models for variable resolution, scale, dimension and discontinuity

Author: Jansen van Rensburg, Gerhardus J ; Bogaers, Alfred EJ Date: Sep 2018 Surrogate- or metamodels approximate and so reduce the computational cost associated with evaluating computer experiments of interest over a set of design variables. Radial Basis Functions (RBFs) are a popular metamodel choice due to its ease ... Read more
Material parameter identification on metal matrix composites

Author: Jansen van Rensburg, Gerhardus J ; Kok, S ; Wilke, DN Date: Jul 2012 Tests were done on the compressive behaviour of different metal matrix composite materials. These extremely hard engineering materials consist of ceramic particles embedded in a metal alloy binder. Due to the high stiffness and brittle nature ... Read more
Numerical simulation of plastic deformation and mechanical response of strip rolled aluminium alloys

Author: Jansen van Rensburg, Gerhardus J ; Bogaers, Alfred EJ Date: Oct 2018 During the optimal design and simulation of machining or forming processes, detailed simulation of structural response is typically required for use in Finite Element Analysis (FEA). In this study, the bulk temperature and rate dependent ... Read more
Proceedings of the 2018 International Women in Science Without Borders (WISWB) – Indaba

Author: Burke, Michael G ; Maphanga, Regina R ; Jansen van Rensburg, Gerhardus J ; Bogaers, Alfred EJ ; Das, Sonali Date: Jun 2018 The 2nd International Women in Science Without Borders (WISWB) Indaba brings the WISWB series from the north of the African continent where the inaugural chapter was held in Egypt in 2017, to the very south of the African continent, Johannesburg, ... Read more
Simultaneous boundary value and material parameter estimation using imperfect compression data

Author: Jansen van Rensburg, Gerhardus J ; Kok, S ; Wilke, DN Date: Sep 2014 Data is available for different hard metal samples tested in compression using a modified tensile test specimen. Three strain gauges were placed 120 degrees apart around the circumference of the centre of the test section. The spread of the ... Read more
Simultaneous estimation of experimental and material parameters

Author: Jansen van Rensburg, Gerhardus J ; Kok, S ; Wilke, DN Date: Jul 2012 This conference contribution focusses on the invertibility of non-ideal material tests to accurately determine material parameters. This is done by attempting to model non-ideal test cases and comparing strains as well as force history to the ... Read more
Steel alloy hot roll simulations and through-thickness variation using dislocation density-based modeling

Author: Jansen van Rensburg, Gerhardus J ; Kok, S ; Wilke, DN Date: Oct 2017 Different roll pass reduction schedules have different effects on the through-thickness properties of hot-rolled metal slabs. In order to assess or improve a reduction schedule using the finite element method, a material model is required ... Read more
Tutorial on state variable based plasticity: an Abaqus UHARD subroutine

Author: Jansen van Rensburg, Gerhardus J ; Kok, S Date: Dec 2012 Since plasticity is path dependent, it is necessary to properly take into account the deformation, strain rate and temperature history in applications such as crash worthiness and ballistics simulations. To accurately model the evolution of ... Read more

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Browsing by Author "Jansen van Rensburg, Gerhardus J"

Browsing by Author "Jansen van Rensburg, Gerhardus J"

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All of ResearchSpace

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General Enquiries

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