Ductile fracture locus identification using mesoscale critical equivalent plastic strain

Journal article (2021)

Authors

Haohui Xin Xi’an Jiaotong University
M. Veljkovic Steel & Composite Structures - CEG
Jose A.F. Correia Universidade do Porto
Filippo Berto Norwegian University of Science and Technology (NTNU)
Research Group
Steel & Composite Structures (CEG) (TU Delft)
Copyright: © 2021 Haohui Xin, M. Veljkovic, José A.F.O. Correia, Filippo Berto
DOI
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https://doi.org/10.1111/ffe.13429
Computational homogenization Ductile fracture Mesoscale index Nonlinear finite element simulation
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Published Date

2021

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Engineering Structures

Research Group

Steel & Composite Structures

Abstract

The ductile performance of high strength steel (HSS) from different steel grades, producers, manufacturing processes varies a lot. It is also difficult to conduct all kinds of reliable experiments to generate different stress status through different initial specimen geometries or by applying different load combinations in the civil engineering sector. One of the common issues for HSS structures is to identify the parameters of the ductile fracture model conveniently from the uniaxial stress–strain relationship obtained from common coupon specimens. An attempt is made in this paper to use the proposed mesoscale critical equivalent plastic strain (MCEPS) to calibrate the fracture locus of the uncoupled phenomenological model based only on the engineering stress–strain relationship. The proposed method is successfully validated by the Sandia fracture challenge in 2014.

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