CrachFEM — A Comprehensive Approach For The Prediction Of Sheet Metal Failure

Dell, Harry; Gese, Helmut; Oberhofer, Gernot

doi:10.1063/1.2740806

Cited by 12 publications

(13 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The uniaxial specimen used at ArcelorMittal is widely inspired from the specimen used by MatFEM [3]. It is designed with a hole as shown in Figure 1.…”

Section: The Uniaxial Tensile Test 211 Tensile Specimen With Holementioning

confidence: 99%

“…As proposed by MatFEM [3], the plane strain path is obtained with a notched tensile specimen. Specimen used at ArcelorMittal is provided Figure 10.…”

Section: The Plane Strain Test 231 Notched Tensile Specimenmentioning

confidence: 99%

“…The most complete failure model studied in this paper is the CrachFEM model [3]. This model was developed for failure prediction during forming applications and crash.…”

Section: The Crachfem Failure Modelmentioning

confidence: 99%

“…For this purpose, numerous failure criteria are implemented in the finite element code LS-DYNA [2]. They are defined within MAT224 [2], MAT123 [2] or CrachFem [3] crash failure model cards. They can be formulated in different manners, according to strains or stresses, but it remains possible to compare them in plane stress conditions using the curve representation of the fracture strain according to stress triaxiality [4].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Methodology to assess fracture during crash simulation: fracture strain criteria and their calibration

Dietsch

Tihay

Bui-Van

et al. 2017

Metall. Res. Technol.

View full text Add to dashboard Cite

The use of Advanced High Strength Steels (AHSS) has greatly increased this last decade in the automotive industry. Because of their crash performance and their weight saving potential, these grades constitute a possible solution to achieve the safety and environmental regulations objectives. Nevertheless, the increase of tensile strength of these materials is generally associated with a loss of ductility compared to conventional steels. Thus, the prediction of their failure in crash loading conditions become of great importance for the design of vehicles. This paper proposes to calibrate for any AHSS, as Dual-Phase or Press Hardened Steels, different failure criteria, available in finite element software. First, specific tests and methodologies for strain measurement needed for models calibration are exposed. Second, an overview of these tested models and the procedure applied to take into account mesh dependency are provided. Finally, simulations results are compared with experiment on a real automotive component.

show abstract

“…The uniaxial specimen used at ArcelorMittal is widely inspired from the specimen used by MatFEM [3]. It is designed with a hole as shown in Figure 1.…”

Section: The Uniaxial Tensile Test 211 Tensile Specimen With Holementioning

confidence: 99%

“…As proposed by MatFEM [3], the plane strain path is obtained with a notched tensile specimen. Specimen used at ArcelorMittal is provided Figure 10.…”

Section: The Plane Strain Test 231 Notched Tensile Specimenmentioning

confidence: 99%

“…The most complete failure model studied in this paper is the CrachFEM model [3]. This model was developed for failure prediction during forming applications and crash.…”

Section: The Crachfem Failure Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Methodology to assess fracture during crash simulation: fracture strain criteria and their calibration

Dietsch

Tihay

Bui-Van

et al. 2017

Metall. Res. Technol.

View full text Add to dashboard Cite

show abstract

“…To predict crack initiation due to shear band localisation in a high-strength sheet, CrachFEM shear fracture model [10] or modified Mohr-Coloumb (MMC) fracture model [11] can be used used [12,13]. It was shown that the MMC fracture model gives more flexibility in approximation of fracture strains and can thus yield a more accurate description of the fracture behaviour of a high-strength dual-phase sheet steel DP600 [14].…”

Section: Introductionmentioning

confidence: 99%

On modelling of shear fracture in deep drawing of a high-strength dual-phase sheet steel

Behrens

Bonk

Peshekhodov

2017

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

A new specimen for out-of-plane shear strength of advanced high strength steel sheets B Gu, J He, S H Li et al. Abstract. The paper presents application of fracture behaviour characterisation results of a dual-phase sheet steel DP600 to an FEA of its deep-drawing for shear fracture prediction. The characterisation results were obtained with the help of a characterisation method based on a tensile test on a novel butterfly specimen and published previously by the authors. The aim of the present paper is to evaluate that characterisation method on a deep-drawing process. Based on the previous results of the authors, the fracture behaviour is modelled here with the help of the modified Mohr-Coloumb fracture model. The obtained FEA results reveal that shear fracture of the studied material is predicted too early by the used MMC fracture model. A novel adjustment of the model is proposed yielding infinitely high fracture strains at strongly pressuresuperimposed stress states. As it is often the case in the state-of-the-art fracture characterisation of high-strenght sheet steels, such stress states were not tested during the previously performed fracture characterisation but occur during the studied deep drawing process. With the help of the adjusted MMC fracture model, it is possible to predict the crack initiation moment very accurately and the crack initiation location sufficiently accurately.

show abstract