Structural model for spatially and flatly reinforced medium of rigid-plastic materials considering three-dimensional stress state in all components

Romanova, T. P.; Yankovskii, А. P.

doi:10.1080/15376494.2021.1873468

Cited by 5 publications

(1 citation statement)

References 22 publications

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“…In this paper, the penalty function method is mainly used to solve the velocity field and stress field. According to the variation principle, the actual velocity field is obtained by minimizing function (1) [29][30][31].…”

Section: Finite Element Modelmentioning

confidence: 99%

Numerical Simulation and Temperature Modeling of Magnesium Alloy Strip Rolled by Heated Roll

Mei,

Chen,

Bao

et al. 2023

Metals

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A prediction model for the outlet temperature of magnesium alloy strips in the process of heated-roll rolling was established by using linear fitting and nonlinear regression methods. By inputting the rolling parameters into the model, the outlet temperature of the strip can be accurately predicted, which will then optimize and regulate the properties and microstructures of the magnesium alloys in the rolled form. To verify the reliability of the model, heat transfer experiments of the magnesium alloy rolled by heated rolls were carried out. The results show that under the same conditions, the actual outlet temperature measured experimentally matches well with the outlet temperature predicted by the model, and the relative error is kept within 10%. In the modeling process, Deform V11.0 software was used to simulate the thermal–mechanical behavior of the magnesium alloy rolled by the heated roll. In the process of analyzing the simulated heat transfer, it was found that the temperature rise of the surface and the core is divided into three identical stages: the slow rise, the fast rise, and the thermal equilibrium stages. In addition, the mechanical behavior of the rolling deformation zone was also analyzed, and the strip was subjected to direct heat transfer from the heated rolls during the hot rolling process so that the softening played a major role and the stress value gradually decreased from the middle of the deformation zone to the inlet end and the outlet end. This is so that it can be known that the process of being rolled by the heated rolls not only improves the rolling efficiency, but also ensures the deformation temperature and obtains fine grains.

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Section: Finite Element Modelmentioning

confidence: 99%

Numerical Simulation and Temperature Modeling of Magnesium Alloy Strip Rolled by Heated Roll

Mei,

Chen,

Bao

et al. 2023

Metals

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Flexure and shear response of an impulsively loaded rigid-plastic beam by enhanced linear complementarity approach

Khan

Tariq

Ullah

et al. 2022

Sci Rep

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The linear complementarity approach has been utilized as a systematic and unified numerical process for determining the response of a rigid-plastic structure subjected to impulsive loading. However, the popular Lemke Algorithm for solving linear complementarity problems (LCP) encounters numerical instability issues whilst tracing the response of structures under extreme dynamic loading. This paper presents an efficient LCP approach with an enhanced initiation subroutine for resolving the numerical difficulties of the solver. The numerical response of the impulsively loaded structures is affected by the initial velocity profile, which if not found correctly can undermine the overall response. In the current study, the initial velocity profile is determined by a Linear Programming (LP) subroutine minimizing the energy function. An example of a uniform impulsively loaded simply supported beam is adduced to show the validity and accuracy of the proposed approach. The beam is approximated with bending hinges having infinite resistance to shear. Comparison of the numerical results to the available closed-form solution confirms the excellent performance of the approach. However, a subsequent investigation into a beam having the same support conditions and the applied loading, but with bending and shear deformation, results in numerical instability despite optimizing the initial velocity profile. Thus a more generic description of kinetics and kinematics is proposed that can further enhance the numerical efficiency of the LCP formulation. The ensuing numerical results are compared with the available close form solution to assess the accuracy and efficiency of the developed approach.

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Rigid-plastic behavior and bearing capacity of thin flat reinforced rotating disks

Romanova

2024

Mechanics of Advanced Materials and Structures

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Structural model for spatially and flatly reinforced medium of rigid-plastic materials considering three-dimensional stress state in all components

Cited by 5 publications

References 22 publications

Numerical Simulation and Temperature Modeling of Magnesium Alloy Strip Rolled by Heated Roll

Numerical Simulation and Temperature Modeling of Magnesium Alloy Strip Rolled by Heated Roll

Flexure and shear response of an impulsively loaded rigid-plastic beam by enhanced linear complementarity approach

Rigid-plastic behavior and bearing capacity of thin flat reinforced rotating disks

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