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ThinkMind // SIMUL 2012, The Fourth International Conference on Advances in System Simulation // View article simul_2012_4_30_50026


Modeling Material Heterogeneity by Gaussian Random Fields for the Simulation of Inhomogeneous Mineral Subsoil Machining

Authors:
Nils Raabe
Anita Monika Thieler
Claus Weihs
Christian Rautert
Dirk Biermann

Keywords: Machining, Numerical Simulation, Gaussian Random Fields

Abstract:
In general, tools used in concrete machining operations are not adapted to the particular machining processes whereas tool wear and production time are the main cost causing factors. A geometrical simulation model describing cutting forces and wear of both diamond and workpiece had been proposed in the past. This model takes the abrasive nature of the machined material into account by modeling the microparts of diamond and workpiece as delaunay tessellations of points randomly distributed within the workpiece and simulating the process iteratively. By fitting the model to a series of real experiments, the general appropriateness of the model had been shown. An implicit assumption of these fittings is that the connected processes are stationary. However, after investigating real process data in the time domain, it turns out that this assumption does not hold. Instead, the forces are obviously affected by material heterogeneity which is not taken into account in the first stage model. To fill this gap, now, an extension of the simulation model is introduced, where the material heterogeneity is modeled and simulated by Gaussian Random Fields.

Pages: 97 to 102

Copyright: Copyright (c) IARIA, 2012

Publication date: November 18, 2012

Published in: conference

ISSN: 2308-4537

ISBN: 978-1-61208-234-9

Location: Lisbon, Portugal

Dates: from November 18, 2012 to November 23, 2012

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