Publication detail

Computational prediction of chevron cracking during multi-pass cold forward extrusion

KUBÍK, P. PETRUŠKA, J. JUDAS, J. ŠEBEK, F.

Czech title

Výpočtová predikce trhlin tvaru v při vícechodém dopředném protlačování za studena

English title

Computational prediction of chevron cracking during multi-pass cold forward extrusion

Type

journal article in Web of Science

Language

en

Original abstract

The cold forward extrusion is a manufacturing process that is widespread in automated production due to its economic benefits. The cross-section is reduced during this process, which is accompanied by large plastic deformations. It may lead to the chevron cracking, which has to be predicted for flawless production and maintaining economic advantage. Therefore, the multi-pass cold forward extrusion of cylinder made from AISI 1045 was numerically simulated. The central cracks were predicted by the recently proposed uncoupled ductile fracture criteria. These were calibrated using various experiments, including the small punch test with additional fractographic observation. The material model was implemented into Abaqus using the user subroutine so that defects were successfully predicted using an element deletion technique.

Czech abstract

Dopředné protlačování za studena je výrobní proces, který je rozšířený v automatizované produkci kvůli svým ekonomickým benefitům. Příčný průřez je při tomto procesu redukován, což je provázeno velkými plastickými deformacemi. To může vést ke vzniku trhlin tvaru v, které musí být predikovány pro výrobu bez vad a zachování ekonomické výhodnosti. Proto bylo numericky simulováno vícechodé dopředné protlačování válce z AISI 1045 za studena. Trhliny ve středu byly predikovány pomocí nedávno navržených nesvázaných kritérií tvárného porušování. Tato kritéria byla kalibrována pomocí různých experimentů zahrnujících miniaturní test protlačování s dodatečných fraktografickým pozorováním. Model materiálu byl implementován do Abaqusu pomocí uživatelské podprocedury tak, aby byly defekty úspěšně predikovány pomocí techniky mazání prvků.

English abstract

The cold forward extrusion is a manufacturing process that is widespread in automated production due to its economic benefits. The cross-section is reduced during this process, which is accompanied by large plastic deformations. It may lead to the chevron cracking, which has to be predicted for flawless production and maintaining economic advantage. Therefore, the multi-pass cold forward extrusion of cylinder made from AISI 1045 was numerically simulated. The central cracks were predicted by the recently proposed uncoupled ductile fracture criteria. These were calibrated using various experiments, including the small punch test with additional fractographic observation. The material model was implemented into Abaqus using the user subroutine so that defects were successfully predicted using an element deletion technique.

Keywords in Czech

Uhlíková ocel; praskání v centru; odříznutí; trhliny ve tvaru v; rentgen

Keywords in English

Carbon steel; central bursting; cut-off; v-shaped cracks; x-ray

Released

29.09.2023

ISSN

1526-6125

Volume

102

Number

2023

Pages from–to

154–168

Pages count

15

BIBTEX


@article{BUT184529,
  author="Petr {Kubík} and Jindřich {Petruška} and Jakub {Judas} and František {Šebek},
  title="Computational prediction of chevron cracking during multi-pass cold forward extrusion",
  year="2023",
  volume="102",
  number="2023",
  month="September",
  pages="154--168",
  issn="1526-6125"
}