Publication detail

Calibration of ductile fracture criteria at negative stress triaxiality

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

Czech title

Kalibrace kritérií tvárného porušování v záporné triaxialitě napětí

English title

Calibration of ductile fracture criteria at negative stress triaxiality

Type

journal article in Web of Science

Language

en

Original abstract

The aluminium alloy 2024-T351 and AISI 1045 carbon steel was examined in scope of uncoupled ductile fracture criteria calibration using newly designed specimen. Its novel geometry allowed to reach extremely low stress triaxialities. The analysis of fracture envelopes was carried out with comparison of each criteria cut-off regions after the calibration where one novel criterion, KHPS, has been introduced. Ductile fracture criteria implemented into the commercial finite element code Abaqus through user subroutine VUMAT were applied to simulation of compression of newly designed cylinder with specific recess to show the crack prediction ability using the element deletion technique. Crack initiation loci together with force responses were compared to experimental observations.

Czech abstract

Hliníková slitina 2024-T351 a uhlíková ocel AISI 1045 byly zkoumány v rámci kalibrace nesvázaných kritérií tvárného porušování pomocí nově navrženého vzorku. Jeho nová geometrie umožnila dosáhnout extrémně nízkých triaxialit napětí. Po kalibraci, kde bylo uvedeno jedno nové kritérium, KHPS, byla provedena analýza jednotlivých obálek mezního přetoření a oblastí bez porušování. Kritéria tvárného porušování implementováná do komerčního kódu konečných prvků Abaqus prostřednictvím uživatelského podprogramu VUMAT byla použita pro simulaci tlaku nově navrženého válečku se specifickým vybráním, aby ukázala schopnost predikce trhliny pomocí techniky odstraňování prvků. Místa iniciace trhlin spolu se silovými odezvami byly porovnány s experimentálními pozorováními.

English abstract

The aluminium alloy 2024-T351 and AISI 1045 carbon steel was examined in scope of uncoupled ductile fracture criteria calibration using newly designed specimen. Its novel geometry allowed to reach extremely low stress triaxialities. The analysis of fracture envelopes was carried out with comparison of each criteria cut-off regions after the calibration where one novel criterion, KHPS, has been introduced. Ductile fracture criteria implemented into the commercial finite element code Abaqus through user subroutine VUMAT were applied to simulation of compression of newly designed cylinder with specific recess to show the crack prediction ability using the element deletion technique. Crack initiation loci together with force responses were compared to experimental observations.

Keywords in Czech

Tvárné porušování; Triaxialita napětí; Uhlíková ocel; Slitina hliníku; Plasticita; Fenomenologická kritéria

Keywords in English

Ductile fracture; Stress triaxiality; Carbon steel; Aluminium alloy; Plasticity; Phenomenological criteria

Released

28.04.2016

ISSN

0020-7403

Volume

108-109

Number

4

Pages from–to

90–103

Pages count

14

BIBTEX


@article{BUT122125,
  author="Petr {Kubík} and František {Šebek} and Jiří {Hůlka} and Jindřich {Petruška},
  title="Calibration of ductile fracture criteria at negative stress triaxiality",
  year="2016",
  volume="108-109",
  number="4",
  month="April",
  pages="90--103",
  issn="0020-7403"
}