A generalized Orowan model for cleavage fracture

Jinshan He, Junhe Lian*, Georg Golisch, Xiaodong Jie, Sebastian Münstermann

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)

Abstract

This study presents a new cleavage fracture model emphasizing the effects of plastic strain and the stress state, especially the Lode angle. The model extends the classical Orowan criterion by introducing a general strain-based description of microcrack initiation with stress-state dependency. In addition to the proportional loading case, the model is also formulated in a non-proportional scheme to account for the loading history. The model is fully calibrated with a hybrid experimental–numerical approach and verified by quasi-static Charpy tests. The good agreement between the experimental and numerical results illustrates the importance of considering the Lode angle and loading history.

Original languageEnglish
Pages (from-to)105-118
Number of pages14
JournalEngineering Fracture Mechanics
Volume186
DOIs
Publication statusPublished - 1 Dec 2017
MoE publication typeA1 Journal article-refereed

Keywords

  • Cleavage fracture
  • FEM
  • Local approach
  • Lode angle
  • Non-proportional loading
  • Statistical model

Fingerprint Dive into the research topics of 'A generalized Orowan model for cleavage fracture'. Together they form a unique fingerprint.

  • Cite this