Prediction of Deep Drawing Ratio for DP800 Steel by Using Modified-Mohr-Coulomb Damage Criteria

Nuri Şen; Tolgahan Civek; Elifnaz Baba

Article Details

Prediction of Deep Drawing Ratio for DP800 Steel by Using Modified-Mohr-Coulomb Damage Criteria

Authors:

Nuri Şen | Tolgahan Civek | Elifnaz Baba

Publisher:

Duzce University

Main Topics:

Sayısal Modelleme ve Mekanik Karakterizasyon

Journal:

Düzce Üniversitesi Bilim ve Teknoloji Dergisi Vol.13 Issue 2, pp.735-751

Document Type:

Article

Publication Date:

4/2025

Document Language:

English

Document ID (Org No.):

2001346580

pISSN:

2148-2446

Keywords:

Abstract:

 The demand for low-cost production in vehicle manufacturing while complying with the safety and environmental regulations is an enormous challenge. To comply with these challenges, sheet metal forming industries now extensively use advanced high-strength steels AHSSs in their products. However, due to excellent strength levels of AHSSs, problems arising in their forming stage, such as large spring-back and fracture, hinder the manufacturing process. At this stage, implementing finite element analysis FEA in the design processes greatly improves manufacturing processes since it allows determining possible forming errors before the actual forming process. In this study, the formability of DP800 steel has been investigated by carrying out deep drawing experiments. For that, a series of circular sheet metals, whose diameters were incrementally increased, have been deep drawn to a cup shape to determine the limiting drawing ratio LDR. Additionally, Modified Mohr-Coulomb damage model has been utilised to predict the LDR in FEA. It has been found that the LDR of DP800 is 2.13 and the implemented damage model can successfully predict the LDR within only 2.35 error.

 The demand for low-cost production in vehicle manufacturing while complying with the safety and environmental regulations is an enormous challenge. To comply with these challenges, sheet metal forming industries now extensively use advanced high-strength steels AHSSs in their products. However, due to excellent strength levels of AHSSs, problems arising in their forming stage, such as large spring-back and fracture, hinder the manufacturing process. At this stage, implementing finite element analysis FEA in the design processes greatly improves manufacturing processes since it allows determining possible forming errors before the actual forming process. In this study, the formability of DP800 steel has been investigated by carrying out deep drawing experiments. For that, a series of circular sheet metals, whose diameters were incrementally increased, have been deep drawn to a cup shape to determine the limiting drawing ratio LDR. Additionally, Modified Mohr-Coulomb damage model has been utilised to predict the LDR in FEA. It has been found that the LDR of DP800 is 2.13 and the implemented damage model can successfully predict the LDR within only 2.35 error.

 The demand for low-cost production in vehicle manufacturing while complying with the safety and environmental regulations is an enormous challenge. To comply with these challenges, sheet metal forming industries now extensively use advanced high-strength steels AHSSs in their products. However, due to excellent strength levels of AHSSs, problems arising in their forming stage, such as large spring-back and fracture, hinder the manufacturing process. At this stage, implementing finite element analysis FEA in the design processes greatly improves manufacturing processes since it allows determining possible forming errors before the actual forming process. In this study, the formability of DP800 steel has been investigated by carrying out deep drawing experiments. For that, a series of circular sheet metals, whose diameters were incrementally increased, have been deep drawn to a cup shape to determine the limiting drawing ratio LDR. Additionally, Modified Mohr-Coulomb damage model has been utilised to predict the LDR in FEA. It has been found that the LDR of DP800 is 2.13 and the implemented damage model can successfully predict the LDR within only 2.35 error.

 Araç imalatında güvenlik ve çevre düzenlemelerine uyum sağlarken düşük maliyetli üretim talebi muazzam bir zorluktur. Bu zorluklara uyum sağlamak için, sac metal şekillendirme endüstrileri artık ürünlerinde yaygın olarak gelişmiş yüksek dayanımlı çelikler AHSSler kullanmaktadır. Ancak, AHSSlerin mükemmel dayanım seviyeleri nedeniyle, büyük geri yaylanma ve kırılma gibi şekillendirme aşamalarında ortaya çıkan sorunlar üretim sürecini engellemektedir. Bu aşamada, tasarım süreçlerinde sonlu elemanlar analizinin FEA uygulanması, gerçek şekillendirme sürecinden önce olası şekillendirme hatalarının belirlenmesine olanak tanıdığı için üretim süreçlerini büyük ölçüde iyileştirmektedir. Bu çalışmada, derin çekme deneyleri gerçekleştirilerek DP800 çeliğinin şekillendirilebilirliği araştırılmıştır. Bunun için, çapları kademeli olarak artırılan bir dizi dairesel sac metal, derin çekme oranını LDR belirlemek için bardak formunda derin çekilmiştir. Ek olarak, Değiştirilmiş Mohr-Coulomb hasar modeli, FEAdaki LDRyi tahmin etmek için kullanılmıştır. DP800ün LDRsinin 2.13 olduğu ve uygulanan hasar modelinin LDRyi sadece 2.35 hata payıyla başarılı bir şekilde tahmin edebildiği bulunmuştur.

Article Details

Prediction of Deep Drawing Ratio for DP800 Steel by Using Modified-Mohr-Coulomb Damage Criteria

Authors:

Nuri Şen | Tolgahan Civek | Elifnaz Baba

Publisher:

Duzce University

Main Topics:

Sayısal Modelleme ve Mekanik Karakterizasyon

Journal:

Düzce Üniversitesi Bilim ve Teknoloji Dergisi Vol.13 Issue 2, pp.735-751

Document Type:

Article

Publication Date:

4/2025

Document Language:

English

Document ID (Org No.):

2001346580

pISSN:

2148-2446

DP800 steel

Deep drawing ratio

Finite element analysisDP800 Çeliği

Derin çekme oranı

Sonlu elemanlar analizi

Issues

Article Details

Prediction of Deep Drawing Ratio for DP800 Steel by Using Modified-Mohr-Coulomb Damage Criteria

Authors: Nuri Şen | Tolgahan Civek | Elifnaz Baba

Publisher: Duzce University

Main Topics: Sayısal Modelleme ve Mekanik Karakterizasyon

Journal: Düzce Üniversitesi Bilim ve Teknoloji Dergisi Vol.13 Issue 2, pp.735-751

Document Type: Article

Publication Date: 4/2025

Document Language: English

Document ID (Org No.): 2001346580

pISSN: 2148-2446

DP800 steel

Deep drawing ratio

Finite element analysisDP800 Çeliği

Derin çekme oranı

Sonlu elemanlar analizi

Issues

Authors:

Nuri Şen | Tolgahan Civek | Elifnaz Baba

Publisher:

Duzce University

Main Topics:

Sayısal Modelleme ve Mekanik Karakterizasyon

Journal:

Düzce Üniversitesi Bilim ve Teknoloji Dergisi Vol.13 Issue 2, pp.735-751

Document Type:

Article

Publication Date:

4/2025

Document Language:

English

Document ID (Org No.):

2001346580

pISSN:

2148-2446