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  4. Modelling and simulation of fatigue crack initiation in metallic joints based on crystal plasticity
 
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2016
Journal Article
Titel

Modelling and simulation of fatigue crack initiation in metallic joints based on crystal plasticity

Alternative
Romania
Abstract
In the present study a numerical model to simulate the initiation growth of fatigue cracks in welded joints is shown. The developed model is based on a polycrystalline microstructure with potential slip bands whose directions are dependent on the grain orientations. Considering transgranular crack growth, the crack propagation direction at the grain boundaries is determined by the potential slip directions in the neighboring grain and an energy-based criterion. Subsequently, a statistic analysis of different computed crack path provides a distribution of the number of cycles upto a pre-defined crack length which is as an incipient crack important for many fracture mechanics evaluation concepts.
Author(s)
Beckmann, C.
Fraunhofer-Institut für Werkstoffmechanik IWM
Farajian, M.
Fraunhofer-Institut für Werkstoffmechanik IWM
Siegele, D.
Fraunhofer-Institut für Werkstoffmechanik IWM
Hohe, J.
Fraunhofer-Institut für Werkstoffmechanik IWM
Zeitschrift
Letters in applied nanobioscience. Online journal
Project(s)
IBESS
Funder
Bundesministerium für Wirtschaft und Technolgie BMWi (Deutschland)
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Language
English
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Fraunhofer-Institut für Werkstoffmechanik IWM
Tags
  • Fatigue Crack

  • Incipient Crack

  • Welded Joint

  • Polycrystalline Micro...

  • Probabilistic Analysi...

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