A model of ductile fracture based on the nucleation and growth of voids

Roy, George; Embury, J.D.; Edwards, Gwynneth M.; Ashby, MF

doi:10.1016/0001-6160(81)90185-1

Cited by 706 publications

(149 citation statements)

References 12 publications

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“…Puttick [l] and Bluhm & Morrissey [2] were among the first to identify the different stages of ductile fracture by performing controlled interrupted tensile experiments. Different stages of ductile fracture were also identified by LeRoy et a1 [3] for various carbon steels. These investigations have led to a better understanding of the basic micromechanics of the ductile fracture process.…”

Section: Introductionmentioning

confidence: 68%

Ductile Fracture of Pure Copper : An Experimental and Numerical Study

et al. 1997

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Abstract. This paper describes the results of interrupted tensile tests carried out on 99.95% pure copper specimens over a range of stress triaxiality conditions. The tested specimens were sectioned and polished to identify the conditions at which voids nucleate and coalesce before the final fracture takes place. Results show that void nucleation and coalescence both have a very strong dependence on stress triaxiality, but appear to be less sensitive to strain-rate. Based on the combined experimental and numerical results, a new criterion for void nucleation is proposed as a function of stress triaxiality. Rkurn6. Cet article pr6sente les resultats d' essais de traction interrompus obtenus sur des 6chantillons de cuirve a 99.95% pur dans des conditions de contraintes triaxiales. Les Cchantillous testes out dtk sectionnes et polis afm d' identifier les conditions de nucleation et de coalescence des vides avant que n'intewienne la rupture finale. Les resultats montrent que la nucleation et la coalescence des vides sont fortement dependantes de la triaxialite des coutraintes; mais sout moins sensibles aux taux de cisaillement. Base sur la combinaison de resultats numeriques et expdrimentaux, un nouveau critkre de nuclkation des vides est propose eu taut que fonction de la triaxialit6 des contraintes.

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Section: Introductionmentioning

confidence: 68%

Ductile Fracture of Pure Copper : An Experimental and Numerical Study

et al. 1997

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“…29) It is generally accepted that if r and w are accurately measured, the stress-strain relation can be predicted beyond necking fairly well in a specimen with a circular cross section. Only if diffuse necking is considered, an empirical expression for the neck geometry parameter introduced by LeRoy 30) could be helpful to simplify calculating r and w which are both difficult to measure with sufficient degree of accuracy, especially in the case of the specimen with square section; 31) w r where, ε pmax implies the true strain when an applied load reaches a maximum value. In order to reduce the possible errors induced by above hypothesis, the Choung's formula 28) which was proposed for the flat specimen with square cross section was also considered in this study.…”

Section: )mentioning

confidence: 99%

In Situ Observation of Void Nucleation and Growth in a Steel using X-ray Tomography

et al. 2015

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“…Thus, it is postulated that chromium and aluminum, which dissolve in iron carbide and distort the carbide lattice (or form carbide of a different structure), decrease the grain boundary carbide strength. On the other hand, silicon, which does not dissolve in the carbide, does not influence the grain boundary carbide strength (material of Le Roy et al (19)). Manganese is known to produce an M3C type carbide, as does iron, and therefore may behave in a indistinguishable way from iron in influencing the grain boundary strength.…”

Section: Properties and Strengtheninrr Mechanismsmentioning

confidence: 99%

Influence of Severe Plastic Deformation on the Structure and Properties of Ultrahigh-Carbon Steel Wire

Lesuer

Syn

Sherby

2000

Investigations and Applications of Severe Plastic Deformation

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Ultrahigh-carbon steel wire can achieve very high strength after severe plastic deformation, because of the fine, stable substructures produce. Tensile strengths approaching 6000 MPa are predicted for UHCS containing 1.8%C. This paper discusses the microstructural evolution during drawing of UHCS wire, the resulting strength produced and the factors influencing fracture. Drawing produces considerable alignment of the pearlite plates. Dislocation cells develop within the ferrite plates and, with increasing strain, the size normal to the axis (h) decreases. These dislocation cells resist dynamic recovery during wire drawing and thus extremely fine substructures can be developed (h < 10 nm). Increasing the carbon content reduces the mean free ferrite path in the as-patented wire and the cell size developed during drawing. For UHCS, the strength varies as X.5. Fracture of these steels was found to be a function of carbide size and composition. The influence of processing and composition on achieving high strength in these wires during severe plastic deformation is discussed.

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A model of ductile fracture based on the nucleation and growth of voids

Cited by 706 publications

References 12 publications

Ductile Fracture of Pure Copper : An Experimental and Numerical Study

Ductile Fracture of Pure Copper : An Experimental and Numerical Study

In Situ Observation of Void Nucleation and Growth in a Steel using X-ray Tomography

Influence of Severe Plastic Deformation on the Structure and Properties of Ultrahigh-Carbon Steel Wire

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