Strain-Based damage model for ductile tearing simulation under combined tensile and shear modes

Eui Kyun Park, Jin Ha Hwang, Yun Jae Kim, Tomohisa Kumagai

Research output: Contribution to journalArticlepeer-review

Abstract

This paper proposes a strain-based damage model to simulate ductile tearing under combined tensile and shear modes. For tensile mode, the multiaxial fracture strain model depending only on the stress triaxiality is used, determined by analysing smooth bar tensile test and fracture toughness test data. For shear mode, a simple constant fracture strain model is used, determined by analysing smooth bar torsion test and torsion fracture test using a deep surface cracked cylinder specimen. The proposed damage model is applied to simulate circumferential surface cracked pipe made of SUS 304 under combined bending and torsion. Comparison with full-scale surface cracked pipe test data suggests that the use of the combined tensile and shear damage model with the linear interaction rule gives good and conservative prediction results.

Original languageEnglish
Article number110122
JournalEngineering Fracture Mechanics
Volume303
DOIs
Publication statusPublished - 2024 Jun 5

Bibliographical note

Publisher Copyright:
© 2024 Elsevier Ltd

Keywords

  • Circumferential surface cracked pipe
  • Combined bending and torsion
  • Ductile tearing simulation
  • Finite element analysis
  • Multi-axial fracture strain model

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering

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