Fracture prediction in plastic deformation processes

Clift, Sally E; Hartley, P.; Sturgess, C. E. N.; Rowe, G. W.

doi:10.1016/0020-7403(90)90148-c

Cited by 376 publications

(129 citation statements)

References 11 publications

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“…These criteria predict the onset of failure at a material point by studying the stress and strain history of this point. Various criteria have been evaluated by for instance Bolt [18] and Clift et al [19]. The Gurson model for porous plasticity [20] is one of the most applied approaches for simulation of processes involving ductile fracture.…”

Section: Criteria For Ductile Fracturementioning

confidence: 99%

Predicting the shape of blanked products: a finite element approach

Brokken

Brekelmans

Baaijens

2000

Journal of Materials Processing Technology

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Prediction of the properties of products of the blanking process is nowadays still mainly an empirical effort. The lack of fundamental knowledge of the process may cause lengthy process development, and obstructs process innovation. Consequently, a validated numerical model of the process would be of great value.In this paper, an elasto-plastic ®nite element model will be introduced, in which the extremely large deformations which occur are handled by an operator split arbitrary Lagrange±Euler method combined with remeshing. Ductile fracture is incorporated by a discrete crack approach. To demonstrate the possibilities of the procedure, some simulation results are presented. # 2000 Elsevier Science S.A. All rights reserved.

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Section: Criteria For Ductile Fracturementioning

confidence: 99%

Predicting the shape of blanked products: a finite element approach

Brokken

Brekelmans

Baaijens

2000

Journal of Materials Processing Technology

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“…In this paper, the class of local ductile fracture criteria that incorporate the stress and strain history are applied for the prediction of ductile fracture initiation (a short overview of these criteria is given in [18]). They can be written in a general form as an integral over equivalent plastic strain " e p up to fracture of a certain function of the actual stress state reaching a threshold value C:…”

Section: Introductionmentioning

confidence: 99%

Evaluation of ductile fracture models for different metals in blanking

Goijaerts

Govaert

Baaijens

2001

Journal of Materials Processing Technology

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This study is focussed on the evaluation of ductile fracture methodologies, which are needed to predict product shapes in the blanking process. In an earlier publication [Goijaerts et al., J. Manuf. Sci. Eng., Trans. ASME 122 (2000) 476], two approaches were elaborated using local ductile fracture models. The ®rst strategy incorporates the characterisation of a ductile fracture model in a blanking experiment. The second methodology is more favourable for industry. In this approach, instead of a complex and elaborate blanking experiment, a tensile test is used to characterise a newly proposed criterion, which was shown to predict accurately the ductile fracture for different loading conditions. In this paper, ®nite element simulations and experiments are performed on both tensile testing and blanking to evaluate the validity of both approaches with corresponding criteria for ®ve different metals. In the blanking process, different clearances as well as different cutting radii of the tools are considered. In conclusion, it can be stated that the ®rst approach gives very good results close to, or within the experimental error for all ®ve materials. The second approach, the more favourable one for industry, yields good results that deviate slightly more over the range of metals. #

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“…The number of the activated slip systems increases as the stress triaxiality increases. For example, additional six slip systems (2,3,8,9,13,19 slip systems in Table 1) are activated when the stress triaxiality is increased to 1. The activation of the slip system is further complicated when the void is embedded in the single crystal or at the boundary of bi-crystal.…”

Section: Slip System Activity (Resolved Sheaer Strain On the Slip Sysmentioning

confidence: 99%

“…In the review paper of Takuda et al [2], the prediction capability of the frequently adopted ductile fracture criteria was evaluated based on the sheet formability. Four classical ductile fracture models were considered in their paper: Clift [3], Cockcroft and Latham [4], Brozzo [5] and Oyane model [6]. In these models, the plasticity and ductile fracture criteria are fully uncoupled, which can be used for criteria to estimate the initiation of the fracture after certain amount of plastic deformation.…”

Section: Introductionmentioning

confidence: 99%

Grain Scale Representative Volume Element Simulation to Investigate the Effect of Crystal Orientation on Void Growth in Single and Multi-Crystals

Jeong¹,

Lee

Moon

et al. 2018

Metals

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Abstract:Crystal plasticity finite element (CPFE) simulations were performed on the representative volume elements (RVE) modeling body centered cubic (bcc) single, bi-and tri-crystals. The RVE model was designed to include a void inside a grain, at a grain boundary and at a triple junction. The effect of single crystal orientation on the flow strength and growth rate of the void was discussed under prescribed boundary conditions for constant stress triaxialities. CPFE analyses could explain the effect of inter-grain orientations on the anisotropic growth of the void located at the grain boundaries. The results showed that the rate of void growth had preferred orientation in a single crystal, but the rate could be significantly different when other orientations of neighboring crystals were considered.

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Fracture prediction in plastic deformation processes

Cited by 376 publications

References 11 publications

Predicting the shape of blanked products: a finite element approach

Predicting the shape of blanked products: a finite element approach

Evaluation of ductile fracture models for different metals in blanking

Grain Scale Representative Volume Element Simulation to Investigate the Effect of Crystal Orientation on Void Growth in Single and Multi-Crystals

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