The variational theory of fracture: diffuse cohesive energy and elastic-plastic rupture

This communication anticipates some results of a work in progress [1], addressed to explore the efficiency of the diffuse cohesive energy model for describing the phenomena of fracture and yielding. A first local model is partially successful, but fails to reproduce the strain softening regime. A mo...

Full description

Saved in:
Bibliographic Details
Main Authors: Gianpietro Del Piero, Giovanni Lancioni, Riccardo March
Format: Article
Language:English
Published: Gruppo Italiano Frattura 2013-04-01
Series:Fracture and Structural Integrity
Online Access:https://www.fracturae.com/index.php/fis/article/view/119
Tags: Add Tag
No Tags, Be the first to tag this record!
_version_ 1841562641044078592
author Gianpietro Del Piero
Giovanni Lancioni
Riccardo March
author_facet Gianpietro Del Piero
Giovanni Lancioni
Riccardo March
author_sort Gianpietro Del Piero
collection DOAJ
description This communication anticipates some results of a work in progress [1], addressed to explore the efficiency of the diffuse cohesive energy model for describing the phenomena of fracture and yielding. A first local model is partially successful, but fails to reproduce the strain softening regime. A more robust non-local model, obtained by adding an energy term depending on the deformation gradient, describes many typical features of the inelastic response observed in experiments, including strain localization and necking. Fracture occurs as the result of extreme strain localization. The model predicts different fracture modes, brittle and ductile, depending on the analytical form of the cohesive energy function.
format Article
id doaj-art-67df5f23f30744c7bbc61af0d366560c
institution Kabale University
issn 1971-8993
language English
publishDate 2013-04-01
publisher Gruppo Italiano Frattura
record_format Article
series Fracture and Structural Integrity
spelling doaj-art-67df5f23f30744c7bbc61af0d366560c2025-01-03T00:46:07ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932013-04-0151810.3221/IGF-ESIS.18.01The variational theory of fracture: diffuse cohesive energy and elastic-plastic ruptureGianpietro Del PieroGiovanni LancioniRiccardo MarchThis communication anticipates some results of a work in progress [1], addressed to explore the efficiency of the diffuse cohesive energy model for describing the phenomena of fracture and yielding. A first local model is partially successful, but fails to reproduce the strain softening regime. A more robust non-local model, obtained by adding an energy term depending on the deformation gradient, describes many typical features of the inelastic response observed in experiments, including strain localization and necking. Fracture occurs as the result of extreme strain localization. The model predicts different fracture modes, brittle and ductile, depending on the analytical form of the cohesive energy function.https://www.fracturae.com/index.php/fis/article/view/119
spellingShingle Gianpietro Del Piero
Giovanni Lancioni
Riccardo March
The variational theory of fracture: diffuse cohesive energy and elastic-plastic rupture
Fracture and Structural Integrity
title The variational theory of fracture: diffuse cohesive energy and elastic-plastic rupture
title_full The variational theory of fracture: diffuse cohesive energy and elastic-plastic rupture
title_fullStr The variational theory of fracture: diffuse cohesive energy and elastic-plastic rupture
title_full_unstemmed The variational theory of fracture: diffuse cohesive energy and elastic-plastic rupture
title_short The variational theory of fracture: diffuse cohesive energy and elastic-plastic rupture
title_sort variational theory of fracture diffuse cohesive energy and elastic plastic rupture
url https://www.fracturae.com/index.php/fis/article/view/119
work_keys_str_mv AT gianpietrodelpiero thevariationaltheoryoffracturediffusecohesiveenergyandelasticplasticrupture
AT giovannilancioni thevariationaltheoryoffracturediffusecohesiveenergyandelasticplasticrupture
AT riccardomarch thevariationaltheoryoffracturediffusecohesiveenergyandelasticplasticrupture
AT gianpietrodelpiero variationaltheoryoffracturediffusecohesiveenergyandelasticplasticrupture
AT giovannilancioni variationaltheoryoffracturediffusecohesiveenergyandelasticplasticrupture
AT riccardomarch variationaltheoryoffracturediffusecohesiveenergyandelasticplasticrupture