An engineering methodology for constraint corrections of elastic-plastic fracture toughness - Part I: A review on probabilistic models and exploration of plastic strain effects

Author(s)

Ruggieri, Claudio ^[1] ; Dodds, Jr., Robert H. ^[2]

Affiliation

^[1] Univ Sao Paulo, Dept Naval Architecture & Ocean Engn, Sao Paulo - Brazil

^[2] Univ Illinois, Dept Civil & Environm Engn, Champaign, IL - USA

• Document type: Journal article
• Source: ENGINEERING FRACTURE MECHANICS; v. 134, p. 368-390, JAN 2015.
• Web of Science Citations: 27

Abstract

This work describes a micromechanics methodology based upon a local criterion incorporating the effects of plastic strain on cleavage fracture coupled with statistics of microcracks. A parameter analysis is conducted under well-contained plasticity, where near-tip fields with varying constraint levels are generated through a modified boundary layer formulation. These analyses are extended to assess the effects of plastic strain on fracture toughness correlations for conventional SE(B) specimens with varying a/W-ratios. Fracture toughness predictions for a pressure vessel steel tested in the DBT transition region based on the proposed methodology are considered in Part II of this article. (C) 2015 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 12/13053-2 - Further developments in a micromechanics model for brittle fracture and applications to the master curve methodology
• Grantee: Claudio Ruggieri
• Support Opportunities: Regular Research Grants