Determination of Modified Mohr-Coulomb Damage Model Parameters for DH780 Steel in Finite Element Analysis

Tolgahan Civek; Nuri Şen; Oktay Elkoca

doi:10.29130/dubited.1390682

TR EN

DH780 Çeliği için Modifiye Edilmiş Mohr-Coulomb Hasar Model Parametrelerinin Belirlenmesi

Abstract

Sac metal malzemelerin şekillendirilmesinde uygulanılan prosesler sırasında karşılaşılan çeşitli hata veya kusurlar üretim maliyetini ciddi seviyelerde arttırmaktadır. Metal şekillendirme prosesinin sonlu elemanlar aracılığı ile önceden analiz edilmesi, üretimde deneme yanılma sayılarını ciddi oranda azaltıp, üretim maliyetinin önemli bir seviyede düşmesine yardımcı olmaktadır. Bu bağlamda, sonlu elemanlar analizlerinde deneysel sonuçlara yakınsamanın sağlanması için analizlerde malzemenin plastik davranışını tanımlayan akış modelinin ve aynı zamanda hasar tespiti için yararlanılan hasar modellerinin doğru bir şekilde tanımlanması ve parametrelerinin optimize edilmesi gerekmektedir. Bu çalışmada DH780 çelik malzeme için üç farklı deformasyon durumundaki (Kesme, tek eksenli çekme ve saf gerinim) numuneler çekme testine tabii tutulmuştur. Elde edilen verilerden yararlanılarak, Hollomon sertleşme modelinin ve modifiye edilmiş Mohr Coloumb hasar modellerinin parametreleri belirlenmiş ve optimize edilmiştir. Analiz ortamında yapılan çekme testlerinin sonuçları deneysel verilerle karşılaştırıldığında sonuçlar arasında yüksek oranda bir uyumun sağlandığı gözlemlenmiştir.

Keywords

Sonlu Elemanlar Analizi, Hasar Modolleri, Optimizasyon, Çekme Testi

Supporting Institution

TUBITAK

Project Number

222M321

Determination of Modified Mohr-Coulomb Damage Model Parameters for DH780 Steel in Finite Element Analysis

Abstract

In sheet metal forming processes, tearing problems might be occasionally encountered due to many reasons such as incorrect forming parameters. The trial and error methods that are used to solve such problems, on many occasions, are time-consuming and inefficient in terms of finding the correct forming parameters or die design for the forming process. The finite element analysis method, on the other hand, can be used as a tool that is both time and cost-saving. However, in order to effectively exploit the use of finite element analysis in sheet metal forming operations, the material that is used to be formed needs to be well characterized in terms of its hardening behaviour and failure criteria. In this study, a TRIP-aided DP steel (DH780) has been tensile tested in three different deformation conditions (uniaxial, plane stress and shear) and the parameters of its hardening model (Hollomon) and failure criteria (Modified Mohr-Coulomb) have been determined. According to the simulation results, obtained hardening parameters are able to describe the flow behaviour of the steel and the used failure criterion is able to predict the experimental failure correctly in each deformation condition.

Keywords

Finite element analysis, damage models, optimization, tensile test

Supporting Institution

TUBITAK

Project Number

222M321

Thanks

This work was supported by The Scientific and Technological Research Council of Turkey (TUBITAK) (Project No: 222M321). The authors would like to thank TUBITAK for the financial support given to the project.

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Details

Primary Language

English

Subjects

Numerical Methods in Mechanical Engineering

Journal Section

Research Article

Authors

Tolgahan Civek
0000-0002-1487-5903
Türkiye

Nuri Şen ^*
0000-0002-6501-5858
Türkiye

Oktay Elkoca
0000-0002-0007-0741
Türkiye

Publication Date

December 29, 2023

Submission Date

November 14, 2023

Acceptance Date

December 8, 2023

Published in Issue

Year 2023 Volume: 11 Number: 5

DOI

https://doi.org/10.29130/dubited.1390682

IZ

https://izlik.org/JA88PF57AB

APA

Civek, T., Şen, N., & Elkoca, O. (2023). Determination of Modified Mohr-Coulomb Damage Model Parameters for DH780 Steel in Finite Element Analysis. Duzce University Journal of Science and Technology, 11(5), 2309-2320. https://doi.org/10.29130/dubited.1390682

AMA

1.Civek T, Şen N, Elkoca O. Determination of Modified Mohr-Coulomb Damage Model Parameters for DH780 Steel in Finite Element Analysis. DUBİTED. 2023;11(5):2309-2320. doi:10.29130/dubited.1390682

Chicago

Civek, Tolgahan, Nuri Şen, and Oktay Elkoca. 2023. “Determination of Modified Mohr-Coulomb Damage Model Parameters for DH780 Steel in Finite Element Analysis”. Duzce University Journal of Science and Technology 11 (5): 2309-20. https://doi.org/10.29130/dubited.1390682.

EndNote

Civek T, Şen N, Elkoca O (December 1, 2023) Determination of Modified Mohr-Coulomb Damage Model Parameters for DH780 Steel in Finite Element Analysis. Duzce University Journal of Science and Technology 11 5 2309–2320.

IEEE

[1]T. Civek, N. Şen, and O. Elkoca, “Determination of Modified Mohr-Coulomb Damage Model Parameters for DH780 Steel in Finite Element Analysis”, DUBİTED, vol. 11, no. 5, pp. 2309–2320, Dec. 2023, doi: 10.29130/dubited.1390682.

ISNAD

Civek, Tolgahan - Şen, Nuri - Elkoca, Oktay. “Determination of Modified Mohr-Coulomb Damage Model Parameters for DH780 Steel in Finite Element Analysis”. Duzce University Journal of Science and Technology 11/5 (December 1, 2023): 2309-2320. https://doi.org/10.29130/dubited.1390682.

JAMA

1.Civek T, Şen N, Elkoca O. Determination of Modified Mohr-Coulomb Damage Model Parameters for DH780 Steel in Finite Element Analysis. DUBİTED. 2023;11:2309–2320.

MLA

Civek, Tolgahan, et al. “Determination of Modified Mohr-Coulomb Damage Model Parameters for DH780 Steel in Finite Element Analysis”. Duzce University Journal of Science and Technology, vol. 11, no. 5, Dec. 2023, pp. 2309-20, doi:10.29130/dubited.1390682.

Vancouver

1.Tolgahan Civek, Nuri Şen, Oktay Elkoca. Determination of Modified Mohr-Coulomb Damage Model Parameters for DH780 Steel in Finite Element Analysis. DUBİTED. 2023 Dec. 1;11(5):2309-20. doi:10.29130/dubited.1390682

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