Inverse finite element modeling of the barreling effect on experimental stress-strain curve for high temperature steel compression test

Wang, X.; Li, H.; Chandrashekhara, K.; Rummel, Seth A.; Lekakh, Semen Naumovich; Aken, David C. Van; O’Malley, Ronald J.

doi:10.1016/j.jmatprotec.2017.01.012

Cited by 55 publications

(20 citation statements)

References 12 publications

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“…5. The engineering strain can be recalculated to true strain ε t assuming the axial displacement Δh according to relationship [13]:…”

Section: Deformation Curvesmentioning

confidence: 99%

“…Experimental characterisation of deformation behaviour of materials is complicated by the fact that deformation becomes non-uniform within the tested specimens. This non-uniformity is accompanied with a necking in tension [10][11][12] and barrelling in compression [13][14][15][16][17][18]. Both the necking and barrelling represent local plastic instabilities that depend not only on intrinsic material properties but specimen geometry as well.…”

Section: Introductionmentioning

confidence: 99%

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Effect of anisotropic microstructure on high-temperature compression deformation of CoCrFeNi based complex concentrated alloy

Stamborska¹,

Lapin²

2018

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The effect of anisotropic as-cast microstructure on high-temperature compression deformation of multiphase Co24Cr19Fe24Ni19Al8(Ti,Si,C)6 (at.%) complex concentrated alloy (CCA) derived from a single phase CoCrFeNi based high entropy alloy (HEA) was studied at temperatures ranging from 750 to 900 • C. The highly anisotropic microstructure composed of several columnar grains with [100] crystallographic direction parallel or nearly parallel to the load axis leads to asymmetric barrelled shapes of the compression specimens with multiple protuberances on the barrelled surfaces. The experimental barrelled shapes differ from the numerically calculated ones. The deformation curves exhibit strain hardening stage which is followed by a deformation at a constant flow stress at all studied temperatures. The work hardening rate (WHR) first increases with increasing strain. After achieving a peak value, the WHR decreases and achieves values around zero corresponding to the steady-state deformation. The finite element analysis (FEA) of 3D distribution of local equivalent strains and stresses corresponds qualitatively quite well to the observed structural changes within the barrelled specimens. K e y w o r d s : complex concentrated alloys, high-entropy alloys, anisotropy, plastic deformation, mechanical properties, finite element modelling

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“…5. The engineering strain can be recalculated to true strain ε t assuming the axial displacement Δh according to relationship [13]:…”

Section: Deformation Curvesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of anisotropic microstructure on high-temperature compression deformation of CoCrFeNi based complex concentrated alloy

Stamborska¹,

Lapin²

2018

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“…Their unconstrained inverse problem is solved using a direct search method. Wang et al (2017) included the eect of barreling during Gleeble compression on their eective stress-strain curve for low carbon steels. Their inverse problem encompasses a range of temperatures and strain rates.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous estimation of boundary conditions and material model parameters

Rensburg

Kok

Wilke

2018

Struct Multidisc Optim

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Room temperature experimental compression test data is available for dierent hardmetals. This data indicates the presence of some spatial inhomogeneity due to a compression instability, eccentric loading or time varying equivalent bending moment. To account for this, an inverse analysis is employed that determines not only the constitutive material model parameter values but also the displacement boundary conditions that best replicate the experimental data. The unknown boundary displacement history is approached using a systematically rened piecewise linear approximation, determined alongside material parameter values. The systematic simultaneous estimation of material parameter values and boundary approximations is also investigated using a virtual problem for which the exact solution is known. This investigation conrms that known material parameter values and boundary conditions can be recovered without using any prior knowledge of the exact displacement boundary conditions.

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“…A recent work of Wang et al 15 , using inverse method combined with finite element analysis, shows that the magnitude of barreling increases with increasing friction coefficient.…”

mentioning

confidence: 99%

Numerical and Experimental Studies of Compression-Tested Copper: Proposal for a New Friction Correction

Torrente

2018

Mat. Res.

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New empirical relationship is proposed to calculate instantaneous maximum diameters on the sample during compression test. The proposal is a relationship between instantaneous maximum diameter, friction coefficient, initial dimensions of the sample and the displacement during the compression test. Seventeen compression tests were carried out to copper cylindrical samples without lubrication at room temperature to obtain this new empirical relationship. Numerical simulations were carried out taking into a count this new relationship for numerical validation. The maximum diameters calculated with this new empirical relationship are the same to the experimental measurements. The mechanical behavior calculated with this new relationship and with the friction corrections of Rowe and Dieter are similar. The simulations are similar to the experiments, with differences lower than 4.21%. The simulation shows higher hardening in the middle of the sample than on the bottom. Numerical simulations show that, possibly, the friction coefficient between sample and dies changes meanwhile the sample is hardening.

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Inverse finite element modeling of the barreling effect on experimental stress-strain curve for high temperature steel compression test

Cited by 55 publications

References 12 publications

Effect of anisotropic microstructure on high-temperature compression deformation of CoCrFeNi based complex concentrated alloy

Effect of anisotropic microstructure on high-temperature compression deformation of CoCrFeNi based complex concentrated alloy

Simultaneous estimation of boundary conditions and material model parameters

Numerical and Experimental Studies of Compression-Tested Copper: Proposal for a New Friction Correction

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