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Dive into the research topics where Stefan Fünfschilling is active.

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Featured researches published by Stefan Fünfschilling.


International Journal of Fracture | 2012

A Residual Stress Intensity Factor Solution for Knoop Indentation Cracks

Tanja Lube; Theo Fett; Stefan Fünfschilling; Michael J. Hoffmann; Rainer Oberacker

The residual stress intensity factors at the surface and at the deepest point of the semi-elliptical Knoop indentation crack is determined from the stresses in the damaged zone below the indenter. For this purpose, the weight function approach by Cruse and Besuner was used and wide-range expressions of the geometric function are given. The solution is then applied to a commercial silicon nitride for which all relevant geometrical data are available.


Acta Materialia | 2011

Mechanisms of toughening in silicon nitrides: The roles of crack bridging and microstructure

Stefan Fünfschilling; Theo Fett; Michael J. Hoffmann; Rainer Oberacker; Thomas Schwind; Johannes Wippler; Thomas Böhlke; Hüseyin Özcoban; Gerold A. Schneider; Paul F. Becher; Jamie J. Kruzic


Journal of the American Ceramic Society | 2008

R‐Curve Determination for the Initial Stage of Crack Extension in Si3N4

Theo Fett; Stefan Fünfschilling; Michael J. Hoffmann; Rainer Oberacker; Hans Jelitto; Gerold A. Schneider


Journal of the American Ceramic Society | 2011

Effect of Water Penetration on the Strength and Toughness of Silica Glass

Sheldon M. Wiederhorn; Theo Fett; Gabriele Rizzi; Stefan Fünfschilling; Michael J. Hoffmann; Jean-Pierre Guin


Journal of the American Ceramic Society | 2010

R Curves from Compliance and Optical Crack‐Length Measurements

Stefan Fünfschilling; Theo Fett; Rainer Oberacker; Michael J. Hoffmann; Hüseyin Özcoban; Hans Jelitto; Gerold A. Schneider; Jamie J. Kruzic


Journal of Materials Science | 2009

Bridging stresses from R-curves of silicon nitrides

Stefan Fünfschilling; Theo Fett; Michael J. Hoffmann; Rainer Oberacker; Hans Jelitto; Gerold A. Schneider; M. Härtelt; H. Riesch-Oppermann


Journal of the American Ceramic Society | 2011

Crack‐Tip Toughness from Vickers Crack‐Tip Opening Displacements for Materials with Strongly Rising R‐Curves

Stefan Fünfschilling; Theo Fett; Rainer Oberacker; Michael J. Hoffmann; Gerold A. Schneider; Paul F. Becher; Jamie J. Kruzic


Acta Materialia | 2011

Homogenization of the thermoelastic properties of silicon nitride

Johannes Wippler; Stefan Fünfschilling; Felix Fritzen; Thomas Böhlke; Michael J. Hoffmann


Journal of Materials Science | 2009

Determination of the crack-tip toughness in silicon nitride ceramics

Stefan Fünfschilling; Theo Fett; Michael J. Hoffmann; Rainer Oberacker; Hans Jelitto; Gerold A. Schneider


Journal of The European Ceramic Society | 2010

First- and second-order approaches for the direct determination of bridging stresses from R-curves

Stefan Fünfschilling; Theo Fett; S. Gallops; Jamie J. Kruzic; Rainer Oberacker; Michael J. Hoffmann

Collaboration


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Michael J. Hoffmann

Karlsruhe Institute of Technology

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Theo Fett

Karlsruhe Institute of Technology

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Rainer Oberacker

Karlsruhe Institute of Technology

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Jamie J. Kruzic

University of New South Wales

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Gerold A. Schneider

Hamburg University of Technology

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Hans Jelitto

Hamburg University of Technology

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Hüseyin Özcoban

Hamburg University of Technology

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Thomas Schwind

Karlsruhe Institute of Technology

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S. Gallops

Oregon State University

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