Elastic-plastic fracture by homogeneous microvoid coalescence tearing along alternating shear planes

Beachem, C. D.; Yoder, G. R.

doi:10.1007/bf02645619

Cited by 92 publications

(23 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, the development of microvoid also accompanied with the local necking [19]. On the basis of the above-mentioned failure features, it can be drawn that the failure of the experimental alloy under high temperature tensile tests is due to microvoid coalescence [20,21].…”

Section: °C Tensile Testingmentioning

confidence: 91%

Effect of laser shock on tensile deformation behavior of a single crystal nickel-base superalloy

Liu

Qiao

et al. 2017

Materials Science and Engineering: A

View full text Add to dashboard Cite

Section: °C Tensile Testingmentioning

confidence: 91%

Effect of laser shock on tensile deformation behavior of a single crystal nickel-base superalloy

Liu

Qiao

et al. 2017

Materials Science and Engineering: A

View full text Add to dashboard Cite

“…The extra material parameter ql was introduced by Tvergaard [24] in an attempt to make the predictions of Gurson's equations agree with numerical studies of materials containing periodically distributed circular cylindrical voids. Also, f* was defined in [22] as f, for f~fc f* = (2) fc +K(f-L), for f>fc.…”

Section: Constitutive Law and Failure Modelmentioning

confidence: 99%

“…Ductile failure of polycrystalline metals occurs by the nucleation and ~ubsequent coalescence of microvoids [1][2][3][4]. The voids are nucleated by fracture or interfacial decohesion of second phase particles and grow due to plastic straining of the surrounding matrix material.…”

Section: Introductionmentioning

confidence: 99%

Microvoid growth and failure in the ligament between a hole and a blunt crack tip

1985

View full text Add to dashboard Cite

Large deformation finite element analysis has been used to study the near crack tip growth of a cylindrical void ahead of a blunting crack. Such voids are often nucleated at elongated inclusions in specimens cut from rolled steel plates in the long transverse direction. The presence of smaller-scale voids nucleated at carbides or precipitate particles was taken into account by using Gurson's equations to describe the constitutive behavior of the material. Using the modification to Gurson's model introduced by Tvergaard and Needleman [22] we have been able to study the formation and subsequent growth of the microcrack in the ligament between the hole and the crack. Estimates for the crack tip opening displacement for fracture initiation were obtained and compared with those of a fully dense elastic-plastic material.

show abstract

“…It is known from experiments that the voids start to coalesce and eventually ductile failure occurs when the porosity of the material reaches values from 0.1 to 0.3 [3,2,6]. Observations of the fracture surface show that it is typically dimpled.…”

Section: Introductionmentioning

confidence: 99%

A variational constitutive model for porous metal plasticity

2005

View full text Add to dashboard Cite

This paper presents a variational formulation of viscoplastic constitutive updates for porous elastoplastic materials. The material model combines von Mises plasticity with volumetric plastic expansion as induced, e.g., by the growth of voids and defects in metals. The finite deformation theory is based on the multiplicative decomposition of the deformation gradient and an internal variable formulation of continuum thermodynamics. By the use of logarithmic and exponential mappings the stress update algorithms are extended from small strains to finite deformations. Thus the time-discretized version of the porous-viscoplastic constitutive updates is described in a fully variational manner. The range of behavior predicted by the model and the performance of the variational update are demonstrated by its application to the forced expansion and fragmentation of U-6%Nb rings.

show abstract

Elastic-plastic fracture by homogeneous microvoid coalescence tearing along alternating shear planes

Cited by 92 publications

References 2 publications

Effect of laser shock on tensile deformation behavior of a single crystal nickel-base superalloy

Effect of laser shock on tensile deformation behavior of a single crystal nickel-base superalloy

Microvoid growth and failure in the ligament between a hole and a blunt crack tip

A variational constitutive model for porous metal plasticity

Contact Info

Product

Resources

About