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Browsing by Author "Wilke, DN"

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Relaxed error control in shape optimization that utilizes remeshing

Author: Wilke, DN ; Kok, S ; Groenwold, AA Date: Feb 2013 Shape optimization strategies based on error indicators usually require strict error control for every computed design during the optimization run. The strict error control serves two purposes. Firstly, it allows for the accurate computation ... Read more
SAFE-3D analysis of a piezoelectric transducer to excite guided waves in a rail web

Author: Ramatlo, DA ; Long, Craig S ; Loveday, Philip W ; Wilke, DN Date: Oct 2016 Our existing Ultrasonic Broken Rail Detection system detects complete breaks and primarily uses a propagating mode with energy concentrated in the head of the rail. Previous experimental studies have demonstrated that a mode with energy ... 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
Validation of the GPU based BLAZE-DEM framework for hopper discharge

Author: Govender, Nicolin ; Pizette, P ; Wilke, DN ; Abriak, N Date: Sep 2015 Understanding the dynamical behavior of particulate materials is extremely important to many industrial processes, with typical applications that range from hopper flows in agriculture to tumbling mills in the mining industry. The discrete ... Read more

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Browsing by Author "Wilke, DN"

Browsing by Author "Wilke, DN"

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