Global and Local Approaches of Fracture — Transferability of Laboratory Test Results to Components

Pineau, A.

doi:10.1007/978-1-4612-2934-6_6

Cited by 41 publications

(28 citation statements)

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“…Provided that the failure mechanisms do not change for a given material and prescribed conditions, models accounting for both void nucleation and growth allow describing size and geometry effects [19,101] which are often encountered when trying to transfer parameters from laboratory specimens to structures [102].…”

Section: Damage Modelsmentioning

confidence: 99%

Fracture and damage mechanics modelling of thin-walled structures – An overview

Zerbst¹,

Heinimann

Donne³

et al. 2009

Engineering Fracture Mechanics

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Section: Damage Modelsmentioning

confidence: 99%

Fracture and damage mechanics modelling of thin-walled structures – An overview

Zerbst¹,

Heinimann

Donne³

et al. 2009

Engineering Fracture Mechanics

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“…The main objective of this paper is to present an overview of these new methodologies, in particular the so-called local approach to fracture (Pineau 1982(Pineau , 1992(Pineau , 2003, which are based on the investigation of the micromechanisms at a local scale and, through a multiscale approach, on the transfer of these local information to the macroscale. The final goal is to develop predictive approaches which can be used in FE codes for structural analysis.…”

Section: Introductionmentioning

confidence: 99%

Modeling ductile to brittle fracture transition in steels—micromechanical and physical challenges

Pineau

2008

Int J Fract

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Both scientists and engineers are very much concerned with the study of ductileto-brittle transition (DBT) in ferritic steels. For historical reasons the Charpy impact test remains widely used in the industry as a quality control tool to determine the DBT temperature. The transition between the two failure modes, i.e. brittle cleavage at low temperature and ductile fracture at the upper shelf occurs also at low loading rate in fracture toughness tests. Recent developments have been made in the understanding of the micromechanisms controlling either cleavage fracture in BCC metals or ductile rupture by cavity nucleation, growth and coalescence. Other developments have also been made in numerical tools such as the finite element (FE) method incorporating sophisticated constitutive equations and damage laws to simulate ductile crack growth (DCG) and cleavage fracture. Both types of development have thus largely contributed to modeling DBT occurring either in impact tests or in fracture toughness tests. This constitutes the basis of a modern methodology to investigate fracture, which is the so-called local approach to fracture. In this study the micromechanisms of brittle cleavage fracture and ductile rupture are firstly shortly reviewed. Then the transition between both modes of failure is investigated. It is shown that the DBT behavior observed in impact tests or in fracture toughness specimens can be reasonably well predicted using modern theories on brittle and ductile fracture in conjunction with FE numerical simulations. The review includes a detailed study of a number of metallurgical parameters contributing to the variation of the DBT temperature. Two main types of steels are considered : (i) quenched and tempered bainitic and martensitic steels used in the fabrication of pressurized water reactors, and (ii) modern high-toughness line-pipe steels obtained by chemical variations and optimized hot-rolling conditions. An attempt is also made to underline the research areas which remain to be explored for improving the strength-toughness compromise in the development of steels.

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“…Among the many researchers adopting the Gurson-Tvergaard (GT) theory to model crack growth include Needleman, Tvergaard and co-workers [9,16,17,18]; Brocks; et al [19], and most recently Xia and Shih [5,6,7]. Researchers adopting the Rousselier plastici~y theory to model crack extension include Pineau [20] and recent extensive work by Bilby, Howard and Li [21,22,23] aimed at predicting large-scale fracture tests. With a few recent exceptions [21,24,25], these efforts employed plane-strain idealizations due to the enormous computational costs incurred with fully 3-D models.…”

Section: Models Suitable For Large-scale Computationmentioning

confidence: 99%