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Fracture modelling of DP780 sheets using a hybrid experimental-numerical method and two-dimensional digital image correlation

Pack, Kenunhwan, Ahn, Kwanghyun, Huh, Hoon and Lou, Yanshan 2014, Fracture modelling of DP780 sheets using a hybrid experimental-numerical method and two-dimensional digital image correlation, International journal of materials and product technology, vol. 48, no. 1, pp. 34-46, doi: 10.1504/IJMPT.2014.059029.

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Title Fracture modelling of DP780 sheets using a hybrid experimental-numerical method and two-dimensional digital image correlation
Author(s) Pack, Kenunhwan
Ahn, Kwanghyun
Huh, Hoon
Lou, Yanshan
Journal name International journal of materials and product technology
Volume number 48
Issue number 1
Start page 34
End page 46
Total pages 13
Publisher Inderscience Publishers
Place of publication Geneva, Switzerland
Publication date 2014
ISSN 1741-5209
Keyword(s) ductile fracture
digital image correlation
DIC
fracture locus
fracture forming limit diagrams
stress
necking
fracture strain
finite element analysis
FEA
simulation
fracture modelling
Summary This paper is concerned with the construction of fracture envelopes of DP780 sheets using two methods: a hybrid experimental-numerical method; two-dimensional digital image correlation (2D-DIC). For the hybrid method, four types of ductile fracture tests were carried out covering a wide range of stress states on specimens: with a central hole; two symmetric circular notches; flat grooved; and diagonally double-notched. Based on the fracture strain and loading paths identified with finite element simulation, a fracture envelope was obtained by employing the three-parameter modified Mohr-Coulomb fracture model. In addition, the fracture surface strain was directly measured using 2D-DIC. Loading histories of each test were extracted from a surface element of a three dimensional finite element model. The comparison of fracture envelopes constructed by the two methods reveals that there is little difference. Thus, it can be concluded that 2D-DIC is applicable to fracture modelling of DP780 sheets despite the assumption of the plane stress condition even after necking
Language eng
DOI 10.1504/IJMPT.2014.059029
Field of Research 099999 Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C2.1 Other contribution to refereed journal
Copyright notice ©2014, Inderscience Publishers
Persistent URL http://hdl.handle.net/10536/DRO/DU:30063744

Document type: Journal Article
Collection: School of Engineering
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Created: Mon, 02 Jun 2014, 10:01:03 EST

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