Dynamic strain localization in magnesium alloy AZ31B-O

Cliche, Nicolas; Ravi‐Chandar, Krishnaswamy

doi:10.1016/j.mechmat.2017.09.008

Cited by 13 publications

(6 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A possible explanation for these results was sought on the predictions of a linear stability analysis, which brought out that with the increase of the strain rate the dominant necking modes have a strong prevalence over the other growing modes, reducing the scatter in the distribution of neck sizes. Other authors who performed numerical calculations to investigate the influence of material defects on multiple localization and fragmentation problems are Hiroe et al (2008), Zhang and Ravi-Chandar (2010), Liu et al (2013Liu et al ( , 2016 and Cliche and Ravi-Chandar (2018). In these works, as in those mentioned above, material defects are included by allocating a reduced elastic limit to an arbitrary number of material points, or by assuming local variations in the failure strain.…”

Section: Introductionmentioning

confidence: 99%

Finite element analysis to determine the role of porosity in dynamic localization and fragmentation: Application to porous microstructures obtained from additively manufactured materials

Marvi-Mashhadi

Vaz-Romero

Sket

et al. 2021

International Journal of Plasticity

View full text Add to dashboard Cite

In this paper, we have performed a microstructurally-informed finite element analysis on the effect of porosity on the formation of multiple necks and fragments in ductile thin rings subjected to dynamic expansion. For that purpose, we have characterized by X-ray tomography the porous microstructure of 4 different additively manufactured materials (aluminium alloy AlSi 10 Mg, stainless steel 316L, titanium alloy Ti 6 Al 4 V and Inconel 718L) with initial void volume fractions ranging from ≈ 0.0007% to ≈ 2%, and pore sizes varying between ≈ 6 µm and ≈ 110 µm. Three-dimensional analysis of the tomograms has revealed that the voids generally have nearly spherical shape and quite homogeneous spatial distribution in the bulk of the four materials tested. The pore size distributions quantified from the tomograms have been characterized using a Log-normal statistical function, which has been used in conjunction with a Force Biased Algorithm that replicates the experimentally observed random spatial distribution of the voids, to generate ring expansion finite element models in ABAQUS/Explicit (2016) which include actual porous microstructures representative of the materials tested. We have modeled the materials behavior using von Mises plasticity, and we have carried out finite element calculations for both elastic perfectly-plastic materials, and materials which show strain hardening, strain rate hardening and temperature softening effects. Moreover, we have assumed that fracture occurs when a critical value of effective plastic strain is reached. The finite element calculations have been performed for expansion velocities ranging from 50 m/s to 500 m/s. A key point of this investigation is that we have established individualized correlations between the main features of the porous microstructure (i.e. initial void volume fraction, average void size and maximum void size) and the number of necks and fragments formed in the calculations. In addition, we have brought out the effect of the porous microstrucure and inertia on the distributions of neck and fragment sizes. To the authors' knowledge, this is the first paper ever considering actual porous microstructures to investigate the role of material defects in multiple localization and dynamic fragmentation of ductile metallic materials.

show abstract

Section: Introductionmentioning

confidence: 99%

Finite element analysis to determine the role of porosity in dynamic localization and fragmentation: Application to porous microstructures obtained from additively manufactured materials

Marvi-Mashhadi

Vaz-Romero

Sket

et al. 2021

International Journal of Plasticity

View full text Add to dashboard Cite

show abstract

“…The growing interest in energy conservation and emission reduction improves the utilisation of these lightweight alloys and then continues raising the requirements in understanding their mechanical properties [6][7][8][9]. Many reports studied the compression [8], tension [7,10,11], pre-deformation [1,12,13] and impact mechanical responses [8,14] of such materials. These contributions help a lot on constructing the constitutive model of Mg alloy which helpful to provide accurate predictions on stress-strain and forcedisplacement responses [7,15,16].…”

mentioning

confidence: 99%

Deformation responses of AZ31B magnesium alloy under combined shear-compression loading

Lin

Shao

et al. 2023

Materials Science and Technology

View full text Add to dashboard Cite

Combined shear-compression tests were conducted to AZ31B magnesium alloy through shear-compression specimen (SCS) and the deformation response process is captured by digital image correlation technology. The mechanical behaviours and deformation characteristics of SCS with different loading angles are analysed in detailed. Results show that the strain path of SCS is sensitive to the loading angle. The deformation behaviour at initial stage exhibits proportional loading and related to the tangent loading angle which reveals the designability of SCS for mechanical testing with specific requirements.

show abstract

“…It was concluded that as the strain rate increases, the propagation of the release wave emanating from growing necks and early fractures is limited to shorter times, so that the unloading wave does not travel far enough quickly to inhibit further nucleation of necks and fractures at neighboring locations. An incomplete list of additional papers including ring expansion experiments on metallic samples is (Perrone, 1968;Stepanov and Babutskii, 1984;Janiszewski, 2012;Cliche and Ravi-Chandar, 2018).…”

Section: Introductionmentioning

confidence: 99%

The effect of initial texture on multiple necking formation in polycrystalline thin rings subjected to dynamic expansion

N'souglo

Kowalczyk-Gajewska

Marvi-Mashhadi

et al. 2023

Mechanics of Materials

View full text Add to dashboard Cite

Dynamic strain localization in magnesium alloy AZ31B-O

Cited by 13 publications

References 20 publications

Finite element analysis to determine the role of porosity in dynamic localization and fragmentation: Application to porous microstructures obtained from additively manufactured materials

Finite element analysis to determine the role of porosity in dynamic localization and fragmentation: Application to porous microstructures obtained from additively manufactured materials

Deformation responses of AZ31B magnesium alloy under combined shear-compression loading

The effect of initial texture on multiple necking formation in polycrystalline thin rings subjected to dynamic expansion

Contact Info

Product

Resources

About