A discrete dislocation technique for fatigue microcracks (Part II)

Vinko Močilnik; Nenad Gubeljak

doi:10.3139/120.110678

Article

A discrete dislocation technique for fatigue microcracks (Part II)

Vinko Močilnik and Nenad Gubeljak

Published/Copyright: May 16, 2018

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From the journal Materials Testing Volume 57 Issue 1

Abstract

The discrete nature of the phenomenon of crack initiation in the crystal grain lattice was investigated. Fatigue crack propagation within the crystalline grains, the influence of the vicinity of the grain boundary on its propagation and its arrest, and the dislocation modeling of short fatigue crack growth through single shear, were analyzed, respectively.

Kurzfassung

Die diskrete Natur der Rissbildung im Kristallgitter wurde untersucht. Die Ermüdungsrissausbreitung innerhalb der kristallinen Körner, der Einfluss der Korngrenzenumgebung auf Rissfortschritt und –stillstand und die Modellierung von Versetzungen für kurzes Ermüdungsrisswachstum durch Einfachscherung wurde analysiert.

*Correspondence Address, Prof. Dr. Nenad Gubeljak, University of Maribor, Faculty of Mechanical Engineering, Smetanova ul. 17, 2000 Maribor, Slovenia, nenad.gubeljak@um.si

Dr. Vinko Močilnik was born in 1962. He graduated in 1986 from the Faculty of Mechanical Engineering, University of Ljubljana, Slovenia. He continued his postgraduate studies and received his PhD in 2009 at Faculty of Mechanical Engineering, University of Maribor, Slovenia. He worked for 18 years as a development engineer in the field of development and production of technological equipment for metallurgical industry. His main research areas are fatigue and fracture testing as well as application of these findings in manufacturing technologies and the development of new products. He is a researcher at the Institute of Mechanics, Faculty of Mechanical Engineering, University of Maribor and a lecturer at the Engineering High School.

Prof. Dr. Nenad Gubeljak was born in 1963. He graduated 1988 from University of Maribor, Slovenia, Faculty of Mechanical Engineering as BSc. He continued study at same faculty and completed as PhD in 1998. He spent a year as a guest researcher at GKKS Research Centre Geesthacht in Germany in 2000–2001. He is employed as Head of Institute of Mechanics and Chair of Mechanics at Faculty of Mechanical Engineering at University of Maribor. His main research areas are fatigue and fracture testing, analysis of fracture behavior of welded joints and structure integrity assessment.

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Published Online: 2018-05-16

Published in Print: 2015-01-05

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https://doi.org/10.3139/120.110678