A generalized Orowan model for cleavage fracture

Research output: Contribution to journalArticleScientificpeer-review

Researchers

  • Jinshan He
  • Junhe Lian

  • Georg Golisch
  • Xiaodong Jie
  • Sebastian Münstermann

Research units

  • RWTH Aachen University

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.

Details

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

    Research areas

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

ID: 29165771