Influence of constitutive model in springback prediction using the split-ring test

Laurent, Hervé; Grèze, Renaud; Manach, Pierre‐Yves; Thuillier, Sandrine

doi:10.1016/j.ijmecsci.2008.12.010

Cited by 44 publications

(36 citation statements)

References 41 publications

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“…Figure 4 shows the shear-strain curves in the RD at different strain rates, at room temperature. As observed in tensile tests [9,18,20], the analysis of this figure indicates that this material exhibits minor shear strain-rate sensitivity at room temperature. Classically, and due to the PLC effect, it is also interesting to notice that this material presents a negative strain rate sensitivity [11,42,43].…”

Section: Shear Testssupporting

confidence: 52%

“…• (transverse direction (TD) from the rolling direction of the sheet, in order to study the material anisotropy (see [20] for a complete characterisation of this material at room temperature). This alloy presents some oscillations in the stress-strain curves at room temperature.…”

Section: Tensile Testsmentioning

confidence: 99%

“…Large springback is one of the major drawbacks of aluminium alloy sheets. This is one of the main factors which limit the dissemination of aluminium alloys in the automotive industry [20,21]. In recent years, progress has been made on prediction of springback, for example, with respect to the integration in thickness direction, material modelling, geometrical discretization, and so forth [22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

“…An original test, named split-ring test, previously used at room temperature [20,28], is performed up to 200…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Mechanical Behaviour and Springback Study of an Aluminium Alloy in Warm Forming Conditions

Laurent

Coër

Grèze

et al. 2011

ISRN Mechanical Engineering

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This study deals with the mechanical behaviour and material modelling of an AA5754-O alloy at elevated temperature. Experimental shear tests were performed from room temperature up to 200• C, and the material behaviour has been identified with both shear and tensile tests, as a function of temperature. To analyse the influence of temperature during forming over springback, a split-ring test is used. Experimental results are obtained and compared to numerical simulations performed with the finite element in-house code DD3IMP. The numerical process of ring splitting is performed with the in-house code DD3TRIM. The main observed data are force-displacement curves of the punch during forming, cup thickness at the end of forming, and ring gap after splitting. It is shown that all these parameters are strongly dependent on the forming temperature. A correlation is obtained between experimental data and numerical simulation for the evolution of punch force and opening after springback as a function of temperature. The distribution of the tangential stress in the cup wall is the main factor influencing the springback mechanism in warm forming condition.

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Section: Shear Testssupporting

confidence: 52%

Section: Tensile Testsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…An original test, named split-ring test, previously used at room temperature [20,28], is performed up to 200…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Mechanical Behaviour and Springback Study of an Aluminium Alloy in Warm Forming Conditions

Laurent

Coër

Grèze

et al. 2011

ISRN Mechanical Engineering

Self Cite

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show abstract

“…Because manufacturing the tubular exhaust manifold involves rotary pipe bending, 7) appropriate formability must be guaranteed to avoid wrinkling or fracture during the bending process. Adequate control of springback, an elastically driven change in shape following bending, is also required for the tubular manifold to be fitted with other parts [8][9][10] . In particular, recent automotive designs require runner parts with more complex shapes, for which a smaller bending radius is beneficial to secure higher degrees of freedom in terms of the design of the engine exhaust system.…”

Section: Introductionmentioning

confidence: 99%

Bending Formability of Ferritic Stainless Steels for Application to Tubular Exhaust Manifolds

2015

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In this study, the bending formability of tubular pipes made of ferritic stainless steels during the rotary bending process was investigated. Three different types of ferritic stainless steel-STS 439, STS 429EM, and STS 441-were selected as the test materials. Finite element (FE) simulations were introduced to predict maximum bending angles, or equivalently the bending formability, for both as-received and annealed tubes. The results from experiments and FE simulations suggest the following main conclusions. First, the pipe materials used in the rotary bending process were subjected to prior work hardening during the tubing process, which resulted in reduced formability. However, proper heat treatment could enhance the bending formability. The optimum annealing conditions were determined from the microstructure analysis and mechanical assessments by uni-axial tensile tests for various heat-treated samples. An annealing temperature/holding time of 900°C/10-60 s resulted in enhanced formability without grain coarsening for the three tested ferritic stainless steels. Second, a FE model predicted maximum bending angles and thinning profiles at the extrados of pipes for both as-received and heat-treated tubes when the boundary conditions and friction coefficients were properly optimized.

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Numerical Prediction of Effect of Hardening Laws on Springback and Blank Thickness Distribution During Cylindrical Deep Drawing Process

Bendrhir,

Bouchaala,

Azrar

et al. 2023

International Conference on Advanced Intelligent Systems for Sustainable Development

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Influence of constitutive model in springback prediction using the split-ring test

Cited by 44 publications

References 41 publications

Mechanical Behaviour and Springback Study of an Aluminium Alloy in Warm Forming Conditions

Mechanical Behaviour and Springback Study of an Aluminium Alloy in Warm Forming Conditions

Bending Formability of Ferritic Stainless Steels for Application to Tubular Exhaust Manifolds

Numerical Prediction of Effect of Hardening Laws on Springback and Blank Thickness Distribution During Cylindrical Deep Drawing Process

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