Prediction of ductile fracture for advanced high strength steel with a new criterion: Experiments and simulation

Lou, Yanshan; Huh, Hoon

doi:10.1016/j.jmatprotec.2013.03.001

Cited by 204 publications

(73 citation statements)

References 39 publications

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“…Thereafter, some Gurson-type fracture models ( [19], [20], [21]) have been developed, which can be used to predict fracture behavior under shear loading. However, these ductile fracture models do not work well for uniaxial compression, plane strain compression and tube spinning [22,23]. In the field of continuum damage mechanics (CDM), another type of coupled ductile fracture model was put forward by Lemaitre [24].…”

Section: Ductile Fracture Criteria (Dfcs)mentioning

confidence: 99%

Damage evaluation in tube spinnability test with ductile fracture criteria

Wang

Jin

et al. 2015

International Journal of Mechanical Sciences

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Section: Ductile Fracture Criteria (Dfcs)mentioning

confidence: 99%

Damage evaluation in tube spinnability test with ductile fracture criteria

Wang

Jin

et al. 2015

International Journal of Mechanical Sciences

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“…These indicate that, in GTN damage model for forward tube spinning, the void nucleation, growth and coalescence occurs in material uplift area, then the void is annihilated during spinning process under the compression of rollers. In GTN damage model, the characterization of damage evolution can be done by a combination of the stress triaxiality and Lode parameter [24]. Figure 10a,b show the variations of stress triaxiality of the two points during forward spinning process.…”

Section: Evaluating the Applicability Of The Fe Model Coupled With Gtmentioning

confidence: 99%

“…Under shear loads, failure is mainly driven by the shear localization of plastic strain of the inter-voids ligaments due to void rotation and distortion [27,28]. However, the shear strain is not taken account in the In GTN damage model, the characterization of damage evolution can be done by a combination of the stress triaxiality and Lode parameter [24]. Figure 10a,b show the variations of stress triaxiality of the two points during forward spinning process.…”

Section: Evaluating the Applicability Of The Fe Model Coupled With Gtmentioning

confidence: 99%

Evaluating the Applicability of GTN Damage Model in Forward Tube Spinning of Aluminum Alloy

Wang

Zhan

Guo

et al. 2016

Metals

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Tube spinning is an effective plastic-forming technology for forming light-weight, high-precision and high-reliability components in high-tech fields, such as aviation and aerospace. However, cracks commonly occur in tube spinning due to the complexity of stress state, which severely restricts the improvement of the forming quality and forming limit of components. In this study, a finite element (FE) model coupled with Gurson-Tvergaard-Needleman (GTN) damage model for forward tube spinning of 3A21-O aluminum alloy is established and its applicability is evaluated by experiment. Meanwhile, the GTN damage model is employed to study the damage evolution for forward tube spinning of 3A21-O aluminum alloy. The results show that the FE model is appropriate for predicting the macroscopic crack appearing in uplift area for forward tube spinning, while the damage evolution in deformation area could not be predicted well due to the negative stress triaxiality and the neglect of shear deformation. Accumulation of damage in forward tube spinning occurs mainly in the uplift area. Void volume fraction (VVF) in the outer surface of the tube is higher than that in the inner surface. In addition, it is prone to cracking in the outer surface of tube in the material uplift area.

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“…However, in Gruben et al (2011) a similar in-plane shear specimen was investigated where the fracture was assumed to initiate at the centre of the specimen. Lou and Huh (2013b) studied another type of in-plane shear specimen and assumed that fracture is initiated at the location of maximum equivalent plastic strain. In their study the maximum equivalent plastic strain at fracture occurred at a small distance from the edge of the specimen.…”

Section: Experimental Workmentioning

confidence: 99%

Failure characteristics of a dual-phase steel sheet

Björklund

Nilsson

2014

Journal of Materials Processing Technology

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Failure in ductile sheet metal structures is usually caused by one, or a combination of, ductile tensile fractures, ductile shear fractures or localised instability. In this paper the failure characteristics of the high strength steel Docol 600DP are explored. The study includes both experimental and numerical sections. In the experimental sections, the fracture surface of the sheet subjected to Nakajima tests is studied under the microscope with the aim of finding which failure mechanism causes the fracture. In the numerical sections, finite element (FE) simulations have been conducted using solid elements. From these simulations, local stresses and strains have been extracted and analysed with the aim of identifying the fracture dependency of the stress triaxiality and Lode parameter.

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Prediction of ductile fracture for advanced high strength steel with a new criterion: Experiments and simulation

Cited by 204 publications

References 39 publications

Damage evaluation in tube spinnability test with ductile fracture criteria

Damage evaluation in tube spinnability test with ductile fracture criteria

Evaluating the Applicability of GTN Damage Model in Forward Tube Spinning of Aluminum Alloy

Failure characteristics of a dual-phase steel sheet

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