Publication detail

Fracture toughness evaluation of a cracked au thin film by applying a finite element analysis and bulge tes

TINOCO, H.A. HUTAŘ, P. MERLE, B. GOKEM, M. KRUML, T.

Original Title

Fracture toughness evaluation of a cracked au thin film by applying a finite element analysis and bulge tes

Type

journal article in Scopus

Language

English

Original 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.

Keywords

Bulge test, Finite element analysis, Fracture toughness, Gold film,Thin films

Authors

TINOCO, H.A.; HUTAŘ, P.; MERLE, B.; GOKEM, M. KRUML, T.

Released

11. 12. 2019

Publisher

Trans Tech Publications Ltd

ISBN

1013-9826

Periodical

Key Engineering Materials (print)

Year of study

827

Number

1

State

Swiss Confederation

Pages from

196

Pages to

202

Pages count

7

URL

https://www.scientific.net/KEM.827.196

BibTex

@article{BUT165773,
  author="TINOCO, H.A. and HUTAŘ, P. and MERLE, B. and GOKEM, M. KRUML, T.",
  title="Fracture toughness evaluation of a cracked au thin film by applying a finite element analysis and bulge tes",
  journal="Key Engineering Materials (print)",
  year="2019",
  volume="827",
  number="1",
  pages="196--202",
  doi="10.4028/www.scientific.net/KEM.827.196",
  issn="1013-9826",
  url="https://www.scientific.net/KEM.827.196"
}

Documents

46. Fracture_Toughness_evaluation_(Tinoco, 2019).pdf