The GTN damage model based on Hill’48 anisotropic yield criterion and its application in sheet metal forming

Chen, Zhiying; Dong, Xianghuai

doi:10.1016/j.commatsci.2008.07.020

Cited by 99 publications

(41 citation statements)

References 29 publications

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“…As shown in Fig. 2, the results between the present work and Chen's work [3] agreed well, so the UMAT code can be used to simulate the ductile behavior of SP specimens with consideration of anisotropy.…”

Section: Analysis Model To Estimate Anisotropic Ductile Fracturesupporting

confidence: 81%

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Estimation of Ductile Fracture Behavior Incorporating Material Anisotropy

Choi¹,

Lee²,

Jeong³

et al. 2012

Nuclear Engineering and Technology

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Section: Analysis Model To Estimate Anisotropic Ductile Fracturesupporting

confidence: 81%

“…While the GTN(GursonTverggard Needleman) model and Rousselier model have been widely used among the damage models, they did not explicitly take into account the anisotropic features of a material. To consider anisotropic material behavior, Chen et al [3] proposed a modified GTN model in conjunction with Hill's 48 yield criterion.…”

Section: Introductionmentioning

confidence: 99%

Estimation of Ductile Fracture Behavior Incorporating Material Anisotropy

Choi¹,

Lee²,

Jeong³

et al. 2012

Nuclear Engineering and Technology

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“…The Mises yield criterion is used to define isotropic yielding, while the Hill yield criterion is utilized to define anisotropic yielding. In some studies, Hill'48-GTN yield criterion was developed to predict the fracture of anisotropic sheet [37,38]. In this study, the strength-differential effects and anisotropy of the Ti materials are neglected.…”

Section: Fea Modelmentioning

confidence: 99%

Investigation of the effect of forming parameters in incremental sheet forming using a micromechanics based damage model

Gatea

Lü

et al. 2018

Int J Mater Form

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The incremental sheet forming (ISF) process is considered as a feasible solution for forming a variety of small batch and even customised sheet components. The quality of an ISF product is affected by various process parameters, e.g. sheet material, stepdown, feed rate, tool diameter and lubricant. To produce an ISF part of sufficient quality and accuracy without defects, optimal parameters of the ISF process should be selected. In the present work, experiments and FE analyses were conducted to evaluate the influence of the main ISF process parameters including the step-down, feed rate and tool diameter on the formability and fracture of two types of pure Ti (grade 1 and 2). The Gurson-Tvergaard-Needleman (GTN) damage constitutive model with consideration of stress triaxiality was developed to predict ductile fracture in the ISF process due to void nucleation, growth and coalescence. It was found that the ISF parameters have varying degrees of effect on the formability and fracture occurrence of the two types of pure Ti, and grade 2 pure Ti sheet is more sensitive than grade 1 Ti sheet to the forming parameters due to low ductility.

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“…A GTN yield criterion was developed utilizing Abaqus/Explicit via a user-defined material subroutine (VUMAT) by Chen and Dong based on the Hill'48 yield model to predict the damage of anisotropic sheet in deep drawing of a cylindrical cup [12]. It was concluded that the Hill'48-GTN plastic yield criterion provided a promising means to predict the plastic behaviour and fracture in sheet metal forming.…”

Section: Introductionmentioning

confidence: 99%

Modelling of ductile fracture in single point incremental forming using a modified GTN model

Gatea

Lü

et al. 2017

Engineering Fracture Mechanics

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A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. t r a c tUnderstanding the deformation and failure mechanisms in single point incremental forming (SPIF) is of great importance for achieving improved formability. Furthermore, there will be added benefits for more in depth evaluation of the effect of localised deformation to the fracture mechanism in SPIF. Although extensive research has been carried out in recent years, questions still remain on the shear and particularly its effect to the formability in SPIF processes. In this work, a modified Gurson-Tvergaard-Needleman (GTN) damage model was developed with the consideration of shear to predict ductile fracture in the SPIF process due to void nucleation and coalescence with results compared with original GTN model in SPIF. A combined approach of experimental testing and SPIF processing was used to validate finite element results of the shear modified Gurson-Tvergaard-Needleman damage model. The results showed that the shear modified GTN model improved the modelling accuracy of fracture over the original GTN model under shear loading conditions. Furthermore, the shear plays a role under meridional tensile stress to accelerate fracture propagation in SPIF processes.

show abstract

The GTN damage model based on Hill’48 anisotropic yield criterion and its application in sheet metal forming

Cited by 99 publications

References 29 publications

Estimation of Ductile Fracture Behavior Incorporating Material Anisotropy

Estimation of Ductile Fracture Behavior Incorporating Material Anisotropy

Investigation of the effect of forming parameters in incremental sheet forming using a micromechanics based damage model

Modelling of ductile fracture in single point incremental forming using a modified GTN model

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