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Accounting for non-linear effects in fatigue crack propagation simulations using FRANC3D
Linköping University, Department of Management and Engineering, Solid Mechanics. Linköping University, The Institute of Technology.
2014 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

In this thesis methods to account for non-linear effects in fatigue crack propagation simulations using FRANC3D are evaluated. FRANC3D is a crack growth software that supports automated crack growth in the FE mesh using the power of an external FE code.

Introductorily, a theoretical base in fracture mechanics, especially regarding crack propagation models is established. Furthermore, the functionality of FRANC3D is shown for several different applications.

As a benchmark for the investigated methods the associated results are compared to data from laboratory tests. The conditions in the test are closely modeled, but with relevant simplifications. The cyclic life-times are calculated using Paris’ law incorporating the stress intensity factors computed by FRANC3D and with material parameters derived from a different set of experiments than those simulated. When comparing the calculated cyclic life-time with the test data it can be seen that the pure linear elastic simulation, for this particular test set-up, gives nearly as good results as the investigated approaches that account for non-linear effects. 

Place, publisher, year, edition, pages
2014. , 58 p.
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:liu:diva-110251ISRN: LIU-IEI-TEK-A--14/01916--SEOAI: oai:DiVA.org:liu-110251DiVA: diva2:743759
Subject / course
Solid Mechanics
Supervisors
Examiners
Available from: 2014-09-30 Created: 2014-09-05 Last updated: 2014-09-30Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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  • de-DE
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Output format
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