Experimental and numerical study of TA-6V mechanical behavior in different monotonic loading conditions at room temperature

Gilles, Gaëtan; Cazacu, Oana; Hammami, Walid; Habraken, Anne Marie; Duchêne, Laurent

doi:10.1016/j.piutam.2012.03.008

Cited by 12 publications

(5 citation statements)

References 18 publications

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“…The first stage was to correctly fit the initial stiffness of the numerical model with the testing data, dealing with modification on the prescribed boundary conditions. To satisfactory reproduce those experiments, an anisotropic Hill criterion was finally used, whose calibration was done using results from Gilles et al (2012Gilles et al ( , 2011.…”

Section: Visco-elasto-plastic Constitutive Modelmentioning

confidence: 99%

The second Sandia Fracture Challenge: predictions of ductile failure under quasi-static and moderate-rate dynamic loading

Boyce¹,

Kramer²,

Bosiljevac³

et al. 2016

Int J Fract

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Ductile failure of structural metals is relevant to a wide range of engineering scenarios. Computational methods are employed to anticipate the critical conditions of failure, yet they sometimes provide inaccurate and misleading predictions. Challenge scenarios, such as the one presented in the current work, provide an opportunity to assess the blind, quantitative predictive ability of simulation methods against a previously unseen failure problem. Rather than evaluate the predictions of a single simulation approach, the Sandia Fracture Challenge relies on numerous volunteer teams with expertise in computational mechanics to apply a broad range of computational methods, numerical algorithms, and constitutive models to the challenge. This exercise is intended to evaluate the state of health of technologies available for failure prediction. In the first Sandia Fracture Challenge, a wide range of issues were raised in ductile failure modeling, including a lack of consistency in failure models, the importance of shear calibration data, and difficulties in quantifying the uncertainty of prediction [see Boyce et al. (Int J Fract 186:5-68, 2014) for details of these observations]. This second Sandia Fracture Challenge investigated the ductile rupture of a Ti-6Al-4V sheet under both quasi-static and modest-rate dynamic loading (failure in ∼0.1 s). Like the previous challenge, the sheet had an unusual arrangement of notches and holes that added geometric complexity and fostered a competition between tensile-and shear-dominated failure modes. The teams were asked to predict the fracture path and quantitative far-field failure metrics such as the peak force and displacement to cause crack initiation. Fourteen teams contributed blind predictions, and the experimental outcomes were quantified in three independent test labs. Additional shortcomings were revealed in this second challenge such as inconsistency in the application of appropriate boundary conditions, need for a thermomechanical treatment of the heat generation in the dynamic loading condition, and further difficulties in model calibration based on limited realworld engineering data. As with the prior challenge, this work not only documents the 'state-of-the-art' in computational failure prediction of ductile tearing scenarios, but also provides a detailed dataset for non-blind assessment of alternative methods.

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Section: Visco-elasto-plastic Constitutive Modelmentioning

confidence: 99%

The second Sandia Fracture Challenge: predictions of ductile failure under quasi-static and moderate-rate dynamic loading

Boyce¹,

Kramer²,

Bosiljevac³

et al. 2016

Int J Fract

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“…σ F is calculated from Eq. (14), leading to deviatoric and hydrostatic components given by, respectively,…”

Section: Time Integrationmentioning

confidence: 99%

“…Tuninetti et al characterized compression specimens in the three orthogonal directions of the material [13]. In fact, several works have been made for the characterization of both titanium [14,15] and magnesium alloys [16,17], both presenting a HCP crystal structure.…”

Section: Introductionmentioning

confidence: 99%

Modeling of tension–compression asymmetry and orthotropy on metallic materials: Numerical implementation and validation

Barros

Alves

Oliveira

et al. 2016

International Journal of Mechanical Sciences

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a b s t r a c tThe details concerning the implementation of the yield criterion developed by Cazacu et al. 2006 (CPB06) [1], which accounts for both tension-compression asymmetry and orthotropy of the plastic flow, in the fully implicit FE solver DD3IMP (contraction of 'Deep Drawing 3-D IMPlicit') are presented in this work. The implemented constitutive model is extensively described, including the analytical first and second order derivatives required to the stress update algorithm. A set of anisotropy parameters describing the mechanical behavior of two metallic materials at room temperature, namely Zirconium and AZ31-Mg alloy, are identified with the DD3MAT (contraction for 'Deep Drawing 3-D MATerial') in-house code (Alves, 2004) [2]. The anisotropy parameters are identified for both the CPB06 and the Cazacu and Barlat (2001) (CB2001) [3] yield criteria, in order to emphasize the importance and role of the strength differential effect. The results clearly show that the CPB06 yield criterion is able to accurately describe both the in-plane anisotropy and tension-compression asymmetry, as well a different anisotropic behavior in uniaxial tension and uniaxial compression. The numerical simulation of a four-point bending test is performed, considering different orientations of the beam, i.e. of the hard/soft to deform direction relatively to the load direction, allowing to validate the implementation. The results obtained with the CPB06 show its ability to describe with accuracy the strain fields in the beam's central cross-section, the distribution of the tensile and compressive layers and, consequently, the shift of the neutral layer. The comparison with the results obtained with CB2001 indicates that the strength differential effect affects the final deformed shape of the beam, particularly for materials exhibiting strong tension-compression asymmetry.

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“…In order to study the mechanical behavior of TA6V, different quasi-static monotonic tests, namely tension, compression [9], tensile plane strain and simple shear [10,11], were carried out at room temperature and in several in-plane directions. Tensile and compressive tests were performed at a strain rate of 3x10 -4 s -1 while the plane strain and simple shear tests were conducted at a constant speed (5x10 -3 s -1 ).…”

Section: Characterization Of the Behavior Under Different Monotonic Smentioning

confidence: 99%

Experimental and numerical study of TA6V mechanical behavior under different quasi-static strain paths at room temperature

Gilles¹,

Habraken²,

Cazacu³

et al. 2013

AIP Conference Proceedings

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This paper presents an experimental study of the quasi-static mechanical behavior of TA6V titanium alloy. Different monotonic tests were carried out in several orientations in the plane of the sheet in order to characterize the anisotropy and the tension-compression asymmetry exhibited by the material. Initial yielding is modeled by the phenomenological CPB06 criterion and Voce's isotropic hardening is used to describe its evolution. The simulation of a deep-drawing process is performed using the proposed constitutive modeling and compared with experimental data.

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Experimental and numerical study of TA-6V mechanical behavior in different monotonic loading conditions at room temperature

Abstract: openAccessArticle: TruePage Range: 100-100doi: 10.1016/j.piutam.2012.03.008Harvest Date: 2016-01-12 15:12:07issueName: IUTAM Symposium on Linking Scales in Computations: From Microstructure to Macro-scale Propertiescover date: 2012-01-01pubType

Cited by 12 publications

References 18 publications

The second Sandia Fracture Challenge: predictions of ductile failure under quasi-static and moderate-rate dynamic loading

The second Sandia Fracture Challenge: predictions of ductile failure under quasi-static and moderate-rate dynamic loading

Modeling of tension–compression asymmetry and orthotropy on metallic materials: Numerical implementation and validation

Experimental and numerical study of TA6V mechanical behavior under different quasi-static strain paths at room temperature

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