Fracture toughness evaluation of a cracked au thin film by applying a finite element analysis and bulge test
Tinoco HA, Hutař P, Merle B, Göken M, Kruml T (2020)
Publication Type: Conference contribution
Publication year: 2020
Journal
Publisher: Trans Tech Publications Ltd
Book Volume: 827 KEM
Pages Range: 196-202
Conference Proceedings Title: Key Engineering Materials
Event location: Rhodes
ISBN: 9783035715866
DOI: 10.4028/www.scientific.net/KEM.827.196
Abstract
This paper presents a finite element analysis of a pre-cracked freestanding gold thin film subjected to bulge test. These tests were conducted in order to determine the elasto-plastic properties and fracture toughness of the gold films. For the experimental tests, a pre-crack was introduced in the center of the film by focused ion beam (FIB) milling with a length of 10 µ m and a width of 100nm. For the numerical fracture analysis, the problem was divided into two stages; the first stage was the development of the numerical model on the whole film without pre-crack (elasto-plastic analysis) and the second one was performed on a film portion that included the pre-crack (sub-modeling stage). Three different notches (rounded, sharp and V-sharp) were applied to calculate the stress intensity factor around the crack tip using path independent J-integral. The obtained results show that the load-deflection curves for non-cracked and pre-cracked film reproduced the experiments using the calculated elasto-plastic properties. This indicates that the proposed models presented a good correlation and robustness. Additionally, fracture toughness values were calculated between 0.288 0.5 and 0.303 MPa. m0.5 with J-integral values 1.037 J/m2 (elastic) and 1.136 J/m2 (elasto-plastic) which correspond with other calculations available in the literature.
Authors with CRIS profile
Benoit Merle
Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)
Mathias Göken
Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)
Additional Organisation(s)
Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)
Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)
Involved external institutions
Academy of Sciences of the Czech Republic (ASCR) / Akademie věd České republiky (AVČR)
Czech Republic (CZ)
Universidad Autonoma de Manizales (UAM)
Colombia (CO)
Czech Republic (CZ)
Universidad Autonoma de Manizales (UAM)
Colombia (CO)
How to cite
APA:
Tinoco, H.A., Hutař, P., Merle, B., Göken, M., & Kruml, T. (2020). Fracture toughness evaluation of a cracked au thin film by applying a finite element analysis and bulge test. In Key Engineering Materials (pp. 196-202). Rhodes, GR: Trans Tech Publications Ltd.
MLA:
Tinoco, Hector A., et al. "Fracture toughness evaluation of a cracked au thin film by applying a finite element analysis and bulge test." Proceedings of the 18th International Conference on Fracture and Damage Mechanics, FDM 2019, Rhodes Trans Tech Publications Ltd, 2020. 196-202.
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