Friction in Sheet Metal Forming Simulations: Modelling of New Sheet Metal Coatings and Lubricants

Sigvant, Mats; Pilthammar, Johan; Hol, J.; Wiebenga, J.H.; Chezan, Toni; Carleer, B.D.; Boogaard, A.H. van den

doi:10.1088/1757-899x/418/1/012093

Cited by 15 publications

(12 citation statements)

References 5 publications

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“…The isotropic kinematic hardening is modeled by the AutoForm model, which is based on the approach of Kubli et al [9]. In addition, the corresponding friction model from TriboForm has been imported into AutoForm R8.0, allowing the Coulomb friction coefficient to be calculated as a function of the local contact pressure, relative sliding velocity and strain of the sheet material during the process [10]. In particular, the consideration of isotropic kinematic hardening and the application of the advanced friction modeling by TriboForm have shown a significant enhancement of the springback prediction for a hat profile [11].…”

Section: Simulation Conditionsmentioning

confidence: 99%

Influence of the forming process on springback

Heibel

Schweiker

Prabhakar³

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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The use of advanced high-strength steels (AHSS) is associated with increased springback and represents a great challenge for today’s press shops with regard to the dimensional accuracy of cold-formed sheet metal parts. Springback, its appearance and characteristics are mainly dependent on the stress state introduced by the forming process and part geometry before opening the tools. With the aim of determining the influence of the forming process on springback, sheet metal forming simulation is used in this contribution to analyze a hat profile from a high-strength dual-phase steel (DH1000) by three different forming processes: crash forming, bending and drawing. For this purpose, the stresses generated by these processes and resulting springback are examined considering the respective forming history. The results show the strong influence of the material flow controlled by the process and tool geometry on the stress state before springback, which leads to significant differences in the springback of the hat profile among the forming processes: springback increases from crash forming to bending and drawing.

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Section: Simulation Conditionsmentioning

confidence: 99%

Influence of the forming process on springback

Heibel

Schweiker

Prabhakar³

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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“…In order to get more realistic simulations with higher accuracy, tribology effects in metal forming simulations must be taken into account. Some examples of approaches for simulating friction and lubrication in metal forming processes include pressure and velocity dependent friction models and the software TriboForm [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Application of enhanced coulomb models and virtual tribology in a practical study

Carvalho

Lukács

2022

Pollack

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For the final quality of the part, metal forming trends are depending on improvements of friction and tribology. As a consequence, there is a trend in which tribology and friction are becoming increasingly important for correctly replicating the forming simulation of those parts. The objective of this work was to improve the forming simulation of an automotive shell part on AutoForm. The part was provided by a vehicle industry supplier. Enhanced Coulomb models consider a change on friction coefficient due to different factors, better approximating the description of friction to reality. For the current study, pressure and velocity dependent friction models were chosen as long as the combination of both. The virtual tribology was simulated using the software TriboForm. Velocity dependent friction model and the virtual tribology have shown similar results with expected lower coefficients of friction.

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“…It is already well known that the friction coefficient is highly dependent on several parameters like the contact pressure, material in contact, oil type, quantity, tool roughness, ... [2]. However, the friction properties are generally still not considered in detail in stamping numerical simulations.…”

Section: Introductionmentioning

confidence: 99%

TriboForm® software evaluation for ArcelorMittal Steel Products

Bouzid

Bour

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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In numerical simulations, input data should be correctly defined to enable reliable numerical predictions, close to experimental observations. The purpose of this study is to better take into account the tribological behaviour of ArcelorMittal steel products during the stamping process. TriboForm® is an important additional software solution for the simulation of tribology, friction, and lubrication in sheet metal forming process and enables the generation of multiple friction models. A comparison between experimental observations and numerical predictions was investigated for three ArcelorMittal steel grades (CR4-GI, CR180BH-GI+NIT and CR440Y780T-DH-GI) on several stamping parts. This study illustrates the interest of TriboForm® friction law compared to a standard and constant predefined friction coefficient.

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Friction in Sheet Metal Forming Simulations: Modelling of New Sheet Metal Coatings and Lubricants

Cited by 15 publications

References 5 publications

Influence of the forming process on springback

Influence of the forming process on springback

Application of enhanced coulomb models and virtual tribology in a practical study

TriboForm® software evaluation for ArcelorMittal Steel Products

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