Subroutine Embedding and Finite Element Simulation of the Improved Constitutive Equation for Ti6Al4V during High-Speed Machining

Liu, Lijuan; Wu, Wenge; Zhao, Yongjuan; Cheng, Yunhui

doi:10.3390/ma16093344

Cited by 2 publications

(1 citation statement)

References 17 publications

(20 reference statements)

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“…The constitutive models commonly used in simulation software are the Power-Law (P-L) model [25] and the Johnson-Cook (J-C) model [26], which have simple expressions expressed by strain, strain rate and temperature thermal softening. AdvantEdge FEM software is used in this study, which is a specialized software for tool cutting simulation for turning, milling, drilling, etc.…”

Section: Establishment Of Constitutive Modelmentioning

confidence: 99%

A synchronous wear design for inner and outer inserts of indexable drill based on numerical simulation

Li,

Jiang,

Wang

et al. 2024

Preprint

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The synchronous wear of the inner and outer inserts is vital for the indexable drill with stable high-performance stability throughout life. In this study, the finite element simulation model for the indexable drill is developed, in which the accurate material constitutive model considering the strain rate and thermal softening is established experimentally. The synchronous wear design of the inner and outer inserts is implemented based on finite element simulation. The initial radial force is optimized before the synchronous wear design. Then, the wear rates of inner and outer inserts are predicted based on the temperature and stress of tools extracted from the simulations and the classical wear model, which is used for the synchronous wear design. The results show that the calculated tool wear rates for inner and outer inserts are close to each other when the tool edge radius, rake angle and relief angle are 20 µm, 8° and 4°, respectively. The synchronous wear could also be achieved for different process parameters based on the optimized parameters of the insert.

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Section: Establishment Of Constitutive Modelmentioning

confidence: 99%

A synchronous wear design for inner and outer inserts of indexable drill based on numerical simulation

Li,

Jiang,

Wang

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

Optimization of Johnson–Cook Constitutive Model Parameters Using the Nesterov Gradient-Descent Method

2023

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Numerical simulation of impact and shock-wave interactions of deformable solids is an urgent problem. The key to the adequacy and accuracy of simulation is the material model that links the yield strength with accumulated plastic strain, strain rate, and temperature. A material model often used in engineering applications is the empirical Johnson–Cook (JC) model. However, an increase in the impact velocity complicates the choice of the model constants to reach agreement between numerical and experimental data. This paper presents a method for the selection of the JC model constants using an optimization algorithm based on the Nesterov gradient-descent method. A solution quality function is proposed to estimate the deviation of calculations from experimental data and to determine the optimum JC model parameters. Numerical calculations of the Taylor rod-on-anvil impact test were performed for cylindrical copper specimens. The numerical simulation performed with the optimized JC model parameters was in good agreement with the experimental data received by the authors of this paper and with the literature data. The accuracy of simulation depends on the experimental data used. For all considered experiments, the calculation accuracy (solution quality) increased by 10%. This method, developed for selecting optimized material model constants, may be useful for other models, regardless of the numerical code used for high-velocity impact simulations.

show abstract

Subroutine Embedding and Finite Element Simulation of the Improved Constitutive Equation for Ti6Al4V during High-Speed Machining

Cited by 2 publications

References 17 publications

A synchronous wear design for inner and outer inserts of indexable drill based on numerical simulation

A synchronous wear design for inner and outer inserts of indexable drill based on numerical simulation

Optimization of Johnson–Cook Constitutive Model Parameters Using the Nesterov Gradient-Descent Method

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