Modeling and finite element simulation of loading-path-dependent hardening in sheet metals during forming

Clausmeyer, Till; Güner, Alper; Tekkaya, A. Erman; Levkovitch, Vladislav; Svendsen, Bob

doi:10.1016/j.ijplas.2014.01.011

Cited by 32 publications

(13 citation statements)

References 54 publications

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“…In this Levkovitch-Svendsen model (LSM), cross hardening is assumed to affect the flow anisotropy. As attested to by numerous applications of the THM (e.g., Boers et al, 2010;Bouvier et al, 2005Bouvier et al, , 2003Hiwatashi et al, 1997;Li et al, 2003;Thuillier et al, 2010;Wang et al, 2008) and the LSM (e.g., Barthel et al, 2013;Clausmeyer et al, 2014Clausmeyer et al, , 2011bNoman et al, 2010), both models are able to account for the observed effect of cross hardening on experimental stress-deformation data. As investigated and documented in the current work, there are otherwise a number of differences between the two.…”

Section: Summary and Discussionmentioning

confidence: 97%

“…The THM has been employed in a number of works (e.g., Bouvier et al, 2005Bouvier et al, , 2003Haddadi et al, 2006;Hiwatashi et al, 1997;Li et al, 2003;Thuillier et al, 2010) to model anisotropic flow and hardening behavior in sheet metals. This has motivated similar work on models for anisotropic hardening in the continuum (Barlat et al, 2013;Butuc et al, 2011;Carvalho Resende et al, 2013;Clausmeyer et al, 2014;Pietryga et al, 2012;Shi and Mosler, 2012;Tarigopula et al, 2008Tarigopula et al, , 2009 and crystal plastic (Peeters et al, 2002;Viatkina et al, 2007) contexts. More recently, the THM has been modified, extended and generalized to deal with arbitrary changes of loading path by Wang et al (2008).…”

Section: Introductionmentioning

confidence: 90%

“…The surfaces THM1 and LSM1 are those at the end of the tension stage at F 22 À 1 ¼ 0.1. THM2 and LSM2 represent the mixed state at F 22 À 1 þ F 12 ¼ 0.14, while THM3 and LSM3 are at the end of shear loading at F 22 À 1 þ F 12 ¼ 0.5. profiles (consisting of mild steel and DP steel: Haddag et al, 2007), split rings from a drawn cup (consisting of DC06: Wang et al, 2008), or even more complex parts (e.g., channel die and S-rail consisting of DC06: Clausmeyer et al, 2014). Depending on factors such as the geometry of the workpiece, different types of loading path changes occur locally in the structure.…”

Section: Model Comparison In the Context Of Metal Forming Simulationmentioning

confidence: 99%

“…deep drawing. An extension to this concept is the recently proposed cross hardening indicator (Clausmeyer et al, 2014) which considers the degree of loading-path change and the material specific tendency to exhibit cross hardening.…”

Section: Model Comparison In the Context Of Metal Forming Simulationmentioning

confidence: 99%

See 3 more Smart Citations

Comparison of two models for anisotropic hardening and yield surface evolution in bcc sheet steels

Clausmeyer

Svendsen

2015

European Journal of Mechanics - A/Solids

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Section: Summary and Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 90%

Section: Model Comparison In the Context Of Metal Forming Simulationmentioning

confidence: 99%

Section: Model Comparison In the Context Of Metal Forming Simulationmentioning

confidence: 99%

See 2 more Smart Citations

Comparison of two models for anisotropic hardening and yield surface evolution in bcc sheet steels

Clausmeyer

Svendsen

2015

European Journal of Mechanics - A/Solids

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“…The increasing use of high-strength steels in sheet metal parts, however, brings about the formability and shape distortion problems that can not be easily solved, compared to stamping processes involved with conventional, highly formable steel grades. Today, finite element (FE) simulations are generally used for determination of the process parameters and for modelling material behaviour [1][2][3][4][5][6]. The process design approaches, based on FE simulation techniques, have experienced similar difficulties with high-strength steel applications and their effectiveness has been questioned, in particular for springback predictions [7,8].…”

Section: Introductionmentioning

confidence: 99%

Determining Springback Behavior of High-Strength Steels via Channel Forming Process

et al. 2017

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The increasing use of high-strength steels in sheet metal automotive parts usually brings about the springback problems that can not be easily solved, compared to stamping the parts of conventional steel grades. Prediction and compensation of springback at the design stage is very important from both, the academic and the industrial perspectives. For this purpose, finite element analysis and simulative tests are used to understand formability properties of the material. In this study, springback behaviour of high-strength steels was investigated. Angular channel forming process is used as a simulative test with the DP600, DP1000, and DP1400 materials. Channel forming die tools were designed using a shallowly curved geometry for investigating springback behaviour of materials. Die tools were manufactured and forming process was performed at a hydraulic press machine. Sample surfaces were scanned using optical scanning. Then, experimental springback surfaces were compared with reference geometry by shape deviation analysis. It is observed that springback amount of DP1400 is much greater than those of DP600 and DP800 steels. The DP600 steel has minimum springback amount in the flange region and it has shown the smallest deviation from the reference forming surface, as a result of shape deviation analysis.

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Reaching Large Strains During Simple Shear Experiments Thanks to Sequential Re-Machining of the Free Edges

Colon,

Galpin,

Mahéo

et al. 2023

Exp Mech

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Background The simple shear experiment is widely used for the calibration of plasticity models due to straightforward post processing. The specimen can be as simple as a rectangular strip of sheet metal, but the maximum strain is limited by early initiation of fractures from the free edges. Avoiding this drawback has been a major motivation for the development of new specimens with optimized edge geometries or the in-plane torsion test, but at the cost of a more complex analysis of the test and often a reduction of the gauge section. Objective The objective of the present work is to overcome the initiation of fracture from the free edges during simple shear experiments. Our goal is to double the achievable maximum strain, while keeping the size of the specimen and the post processing simplicity of a standard simple shear test. Methods A sequential single shear test is proposed, consisting of several two steps sequences on a notched geometry. First, an interrupted shear test is performed up to a specified displacement value. Then, the damaged free edges of the specimen are removed through milling. The specimen is then ready for the following sequence of shear and re-machining. Results Experiments are performed on three engineering materials, with up to five loading-machining sequences. The maximum attained effective strain is up to two times the one reached during a monotonic experiment. Numerical simulations are used to validate the shear stress and strain calculations from experimental measurements. Practical recommendations are derived for the choice of the displacement step size and Digital Image Correlation analysis. Conclusion It is found that the maximum strain attained before the undesired failure of the specimen during simple shear test can be substantially extended through repeated re-machining of the specimen boundaries, enabling behavior identification at larger strains.

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Modeling and finite element simulation of loading-path-dependent hardening in sheet metals during forming

Cited by 32 publications

References 54 publications

Comparison of two models for anisotropic hardening and yield surface evolution in bcc sheet steels

Comparison of two models for anisotropic hardening and yield surface evolution in bcc sheet steels

Determining Springback Behavior of High-Strength Steels via Channel Forming Process

Reaching Large Strains During Simple Shear Experiments Thanks to Sequential Re-Machining of the Free Edges

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