On the Damage Criteria and their Critical Values for Flowforming of ELI Grade Ti64

Depriester, Dorian; Massoni, Elisabeth

doi:10.4028/www.scientific.net/kem.622-623.1221

Cited by 6 publications

(2 citation statements)

References 13 publications

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“…Flow forming experiments are conducted in CEMEF on a lab sized flow forming machine [5]. It consists in a backward flow forming device with a rotating mandrel.…”

Section: Experimental Flow Forming Campaignmentioning

confidence: 99%

Numerical analysis of a backward flow forming operation of AA6061-T6 and comparison with experiments

Mocellin

Vidal

Frascati³

et al. 2022

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

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Incremental forming processes can be used to produce thin products (tubes or sheets)[1]. Very high deformation of the material can be reached taking advantage of the local and cyclic loading of the material. In this study we will focus on backward flow forming of aluminum tubes. In this process, tube thickness is reduced by the combined action of a rotating mandrel that imposes the inner radius and 3 rollers that decrease progressively the tube thickness. An experimental campaign is conducted on a laboratory device to study the influence reduction rate. The corresponding configurations are simulated to understand the mechanical loading path. The material characterization is presented to focus on the influence of the chosen behavior law on flow forming simulation results. Different damage criteria coming from the literature are studied to evaluate their capability to predict fracture and to compare the amount of damage reached for each process configurations. Even if none of them is able to predict accurately damaging configurations, the classical Cockroft and Latham seems to be the only capable to reflect the hierarchisation of configurations.

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“…Flow forming experiments are conducted in CEMEF on a lab sized flow forming machine [5]. It consists in a backward flow forming device with a rotating mandrel.…”

Section: Experimental Flow Forming Campaignmentioning

confidence: 99%

Numerical analysis of a backward flow forming operation of AA6061-T6 and comparison with experiments

Mocellin

Vidal

Frascati³

et al. 2022

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

View full text Add to dashboard Cite

show abstract

“…Non-coupled ductile damage criteria are still studied nowadays due to their relative simplicity and computational efficiency [8][9][10]. For these criteria, the fracture occurs when a damage indicator threshold is reached.…”

Section: Introductionmentioning

confidence: 99%

Accurate numerical prediction of ductile fracture and micromechanical damage evolution for Ti6Al4V alloy

et al. 2023

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A CPB06-based Stewart-Cazacu micromechanical damage model is implemented and validated for Ti6Al4V material. It provides accurate numerical predictions in terms of macromechanical material response and damage accumulation. The SC11−TNT damage model is implemented in the finite element (FE) software Lagamine following a semi-implicit cutting plane algorithm and a well-chosen flow rule approach. The damage of the material is characterized by the porosity ratio contained within the material. It is modelled by void nucleation, growth and coalescence mechanisms. The onset of the coalescence is established by a criterion based onThomason's approach. The macroscopic results obtained by the implemented model demonstrate a strong ability to predict the experimental elastoplastic mechanical behaviour of the material across a full deformation range and different types of loadings. At the microscopic level, the predicted accumulated porosity ratio of the material matrix at fracture exhibits a good correlation with the experimental observations. The element deletion feature, activated when a certain damage threshold is reached, provides a physical description of the loss of load-carrying capacity of the material during fracture.

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Microstructural Evolution in Inconel 718 During Room-Temperature Tube Flow Forming: Plastic Flow Heterogeneities and δ Phase Evolution

Moussa,

Hazemann,

Srecki

et al. 2024

Metall Mater Trans A

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On the Damage Criteria and their Critical Values for Flowforming of ELI Grade Ti64

Cited by 6 publications

References 13 publications

Numerical analysis of a backward flow forming operation of AA6061-T6 and comparison with experiments

Numerical analysis of a backward flow forming operation of AA6061-T6 and comparison with experiments

Accurate numerical prediction of ductile fracture and micromechanical damage evolution for Ti6Al4V alloy

Microstructural Evolution in Inconel 718 During Room-Temperature Tube Flow Forming: Plastic Flow Heterogeneities and δ Phase Evolution

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