relation: http://eprints.imtlucca.it/2306/
title: A multi-scale numerical method for the study of size-Scale effects in ductile fracture
creator: Corrado, Mauro
creator: Paggi, Marco
creator: Carpinteri, Alberto
subject: TJ Mechanical engineering and machinery
description: The use of a stress-strain constitutive relation for the undamaged material and a traction-separation cohesive crack model with softening for cracking has been demonstrated to be an effective strategy to predict and explain the size-scale effects on the mechanical response of quasi-brittle materials. In metals, where ductile fracture takes place, the situation is more complex due to the interplay between plasticity and fracture. In the present study, we propose a multi-scale numerical method where the shape of a global constitutive relation used at the macro-scale, the so-called hardening cohesive zone model, can be deduced from meso-scale numerical simulations of polycrystalline metals in tension. The shape of this constitutive relation, characterized by an almost linear initial branch followed by a plastic plateau with hardening and finally by softening, is in fact the result of the interplay between two basic forms of nonlinearities: elasto-plasticity inside the grains and classic cohesive cracking for the grain boundaries. 
publisher: MDPI
date: 2014-08-27
type: Article
type: PeerReviewed
format: application/pdf
language: en
rights: cc_by_nd
identifier: http://eprints.imtlucca.it/2306/1/metals-04-00428.pdf
identifier:   Corrado, Mauro and Paggi, Marco and Carpinteri, Alberto  A multi-scale numerical method for the study of size-Scale effects in ductile fracture.  Metals, 4 (3).  pp. 428-444.  ISSN 2075-4701      (2014)  
relation: http://dx.doi.org/10.3390/met4030428
relation: 10.3390/met4030428