Modelling of the cone-type rotary piercing process and analysis of the seamless tube longitudinal shear strain using industrial data

Murillo-Marrodán, Alberto; García, Eduardo; Cortés, Fernando

doi:10.1063/1.5112537

Cited by 7 publications

(9 citation statements)

References 10 publications

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“…The results of tube elongation and wall thickness confirm that the FE model reproduces accurately the geometry of the pierced tube. However, a previous study suggests that the FE model could reproduce correctly the geometry of the tube, but not the shear strain [30]. In order to validate the tube shear strain, the longitudinal torsion is analysed next.…”

Section: Validation Of the Tube Geometrymentioning

confidence: 99%

“…Norton friction model is used for modelling the rolls-billet contact [30], it relates friction to the equivalent stressσ of the material according to…”

Section: Boundary Conditionsmentioning

confidence: 99%

“…Table 4. Coefficients of the friction models, data from [30]. The definition of the thermal boundary conditions was based on information found in the literature [31].…”

Section: Boundary Conditionsmentioning

confidence: 99%

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Analysis of Wall Thickness Eccentricity in the Rotary Tube Piercing Process Using a Strain Correlated FE Model

Murillo-Marrodán

García

Barco³

et al. 2020

Metals

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The wall thickness eccentricity is one of the most important weaknesses that appears in seamless tubes production, since this imperfection is subsequently transferred downstream through the manufacturing stages until the final product. For this reason, in this article a finite element model of the rotary tube piercing (RTP) process is developed aimed at analysing the wall thickness eccentricity imperfection. Experimental data extracted from the industrial process is used for the validation of the model, including operational process variables like power consumption and process velocity, and deformation variables as elongation and longitudinal torsion, originated by axial and shear strain respectively. The cause of longitudinal torsion is also analysed. The two most important conclusions derived from this study are: (I) the longitudinal torsion of the tube is a crucial parameter for the correct model validation, and (II) the combined effect between the uneven temperature distribution of the billet and the plug bending deformation is identified as the major cause of the wall thickness eccentricity flaw.

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Section: Validation Of the Tube Geometrymentioning

confidence: 99%

“…Norton friction model is used for modelling the rolls-billet contact [30], it relates friction to the equivalent stressσ of the material according to…”

Section: Boundary Conditionsmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of Wall Thickness Eccentricity in the Rotary Tube Piercing Process Using a Strain Correlated FE Model

Murillo-Marrodán

García

Barco³

et al. 2020

Metals

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“…Pater et al [ 27 ] used also this model to compare the RTP process in two and three-roll mills. Murillo-Marrodán et al [ 28 , 29 ] used this formulation for the analysis of the RTP process, reproducing accurately the tube deformation. There is also an extended version of Hansel–Spittel.…”

Section: Introductionmentioning

confidence: 99%

“…In short, one important drawback of these models is the dependence of the flow stress on the actual strain, which has been shown not to be a valid state variable [ 41 ]. Nevertheless, in previous studies of the RTP process [ 28 , 29 , 42 , 43 ], Hansel–Spittel has been used, providing accurate results compared to experimental data, but this model does not allow for analyzing the softening processes that take place during plastic deformation.…”

Section: Introductionmentioning

confidence: 99%

Application of an Incremental Constitutive Model for the FE Analysis of Material Dynamic Restoration in the Rotary Tube Piercing Process

Murillo-Marrodán

García

Barco³

et al. 2020

Materials

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In the numerical simulation of hot forming processes, the correct description of material flow stress is very important for the accuracy of the results. For complex manufacturing processes, such as the rotary tube piercing (RTP), constitutive laws based on both power and exponential mathematical expressions are commonly used due to its inherent simplicity, despite the limitations that this approach involves, namely, the use of accumulated strain as a state parameter. In this paper, a constitutive model of the P91 steel derived from the evolution of dislocation density with strain, which takes into account the mechanisms of dynamic recovery (DRV) and dynamic recrystallization (DRX), is proposed for the finite element (FE) analysis of the RTP process. The material model is developed in an incremental manner to allow its implementation in the FE code FORGE®. The success of this implementation is confirmed by the good correlation between results of the simulation and experimental measurements of the manufactured tube (elongation, twist angle, mean wall thickness and eccentricity). In addition, this incremental model allows addressing how the restoring mechanisms of DRV and DRV occur during the RTP process. The analysis puts into evidence that DRV and DRX prevail over each other cyclically, following an alternating sequence during the material processing, due mainly to the effect of the strain rate on the material.

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Effects of tool–workpiece interfaces friction coefficient on power and energy consumption during the piercing phase of seamless tube production

Derazkola

García²,

Murillo-Marrodán³

2022

Journal of Materials Research and Technology

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Modelling of the cone-type rotary piercing process and analysis of the seamless tube longitudinal shear strain using industrial data

Cited by 7 publications

References 10 publications

Analysis of Wall Thickness Eccentricity in the Rotary Tube Piercing Process Using a Strain Correlated FE Model

Analysis of Wall Thickness Eccentricity in the Rotary Tube Piercing Process Using a Strain Correlated FE Model

Application of an Incremental Constitutive Model for the FE Analysis of Material Dynamic Restoration in the Rotary Tube Piercing Process

Effects of tool–workpiece interfaces friction coefficient on power and energy consumption during the piercing phase of seamless tube production

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