Testing and modelling of material behaviour and formability in sheet metal forming

Bruschi, Stefania; Altan, Taylan; Banabic, Dorel; Bariani, Paolo Francesco; Brosius, Alexander; Cao, Jian; Ghiotti, Andrea; Khraisheh, Marwan; Merklein, Marion; Tekkaya, A. Erman

doi:10.1016/j.cirp.2014.05.005

Cited by 211 publications

(93 citation statements)

References 172 publications

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“…In view of this situation, engineers are engrossed on determining methods such as the finite element method (FEM) to acquire precise predictions about geometrical parts, post-forming characteristics and improving design processes. Bruschi et al [13] studied the prediction of possible defects and failures on the basis of process parameters.…”

Section: Introductionmentioning

confidence: 99%

Using the Hollomon Model to Predict Strain-Hardening in Metals

Nutor¹,

Adomako²,

Fang³

2017

AJMSP

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Stress -strain values obtained from tensile tests of aluminium and steel is used to evaluate the true stress -true strain values. The Hollomon's model is then used to predict the strain-hardening behavior in the two specimens. It is clearly seen that the strain-hardening behavior in metals can be described using the Hollomon's model. However, we have assumed that the onset of strain-hardening is at the yield point up until the ultimate tensile strength. The correlation between the experimental true stress -true strain values of aluminium and the calculated values using the Hollomon equation is much better than that of steel.

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Section: Introductionmentioning

confidence: 99%

Using the Hollomon Model to Predict Strain-Hardening in Metals

Nutor¹,

Adomako²,

Fang³

2017

AJMSP

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“…The first characterises the flow behaviour of the sheet and the second predicts the forming limit under defined conditions [4]. The yield locus is used to describe the plastic behaviour of the sheet metals with a normal plastic anisotropy.…”

Section: Materials Properties and Materials Modellingmentioning

confidence: 99%

“…Soft materials usually show a high n-value, where high strength materials have a low one. For the FEM-approach, S. Bruschi [4] divides strain hardening into four different types: (a) isotropic strain hardening, (b) kinematic hardening, (c) rotational hardening, and (d) distortional hardening. Fig.…”

Section: Flow Curve and Strain Hardeningmentioning

confidence: 99%

Applications of Finite Element Simulation in the Development of Advanced Sheet Metal Forming Processes

Jadhav

Schoiswohl

Buchmayr

2018

Berg Huettenmaenn Monatsh

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Sheet metal forming is widely used in automotive, aviation, packaging, and household goods. It is most popular for the manifold technical feasibilities in manufacturing, high precision, mass production, and short processing time. Modern automotive concepts demand a weight reduction by using high strength materials and excellent crash performance, which requires innovative simulation techniques in the design and development phase as well as suitable processing chains. The conventional manufacturing planning method takes a lot of time, hence the Finite Element method (FEM) is applied to reduce the lead time. The FEM prediction accuracy depends on the proper selection of a material model, quality of input parameters, actual operating conditions, and many other factors. This study involves new developments in the sheet metal forming technology, the most influencing factors of the forming process and case studies to justify it. The first case study explains the springback analysis and springback compensation of AlMgSi (6xxx series)-panels. The second case study describes the thickness analysis and deformation behaviour of patchwork blanks for hot stamping processes. Keywords

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“…Therefore, more complex yield functions like Yld2000-2D [5], BBC2000 [6] and Vegter [7] were developed in order to describe the yield surface shape more accurately and improve the results of numerical simulations. As these yield functions need additional points in stress space, extensive efforts for experimental testing and parameter identification are required [1]. Additional testing data of biaxial, plain strain and shear specimen is commonly used to model an accurate material response with these complex yield criteria.…”

Section: State Of the Artmentioning

confidence: 99%

“…Forming simulation supports engineers and toolmakers in the prediction of forming behaviour, formability and final part properties during the process design. In order to comply with the progressive demands in reducing the discrepancy between numerical prediction and experimental results, an improvement of the phenomenological modelling of forming behaviour combined with efficient experimental testing is of high relevance [1].…”

Section: Introductionmentioning

confidence: 99%

Semi-analytic parameter identification for complex yield functions

Küsters¹,

Brosius²

2016

MATEC Web Conf.

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Abstract. This paper presents a new parameter identification scheme for complex yield criteria of sheet metals using experimentally determined load and strain distributions and combining analytical stress analysis on sectional strain data with common inverse analysis. The approach is suitable for specimen with a non-homogenous strain distribution in the specimen and reduces computing time compared to common methods like iteratively updated FEM considerably. It serves to identify a set of material parameters in a fast and precise manner, describing the material behaviour.

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Testing and modelling of material behaviour and formability in sheet metal forming

Cited by 211 publications

References 172 publications

Using the Hollomon Model to Predict Strain-Hardening in Metals

Using the Hollomon Model to Predict Strain-Hardening in Metals

Applications of Finite Element Simulation in the Development of Advanced Sheet Metal Forming Processes

Semi-analytic parameter identification for complex yield functions

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