Please use this identifier to cite or link to this item: https://hdl.handle.net/10216/7099
Author(s): Cai Zheng
J. M. A. César de Sá
F. M. Andrade Pires
Title: A comparison of models for ductile fracture prediction in forging processes
Issue Date: 2007
Abstract: The possibility of predicting ductile fracture plays an important role in the design of components by forging processes.Experimental observations showed that the nucleation, growth and coalescence of voids are the mechanisms thatcontrol the initiation and propagation of fracture and that these mechanisms are influenced in different ways by factorslike the hydrostatic stress, the equivalent stress or by the maximal principal stress. Many ductile fracture indicators, basedon some or all of those factors, are available and used in many practical situations in the design of those components. Inthis work a comparative work of many of those criteria was undertaken. Different criteria were chosen amongst the morepopular ones and from different groups, in which they may be classified, namely those based on micromechanics andthose based on the geometry of voids or their growth mechanisms. The criteria based on the Continuous Damage Mechanics,in which a coupling between plastic deformation and material degradation is taken into account and that include differentdamage evolution descriptions for traction or compressive stress states, give a more correct and clear localizationfor the fracture initiation site.
Subject: Engenharia de materiais, Engenharia dos materiais
Materials engineering, Materials engineering
Scientific areas: Ciências da engenharia e tecnologias::Engenharia dos materiais
Engineering and technology::Materials engineering
URI: https://repositorio-aberto.up.pt/handle/10216/7099
Document Type: Artigo em Revista Científica Internacional
Rights: openAccess
License: https://creativecommons.org/licenses/by-nc/4.0/
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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