An engineering methodology for constraint corrections of elastic-plastic fracture toughness - Part II: Effects of specimen geometry and plastic strain on cleavage fracture predictions

Author(s)

Ruggieri, Claudio ^[1] ; Savioli, Rafael G. ^[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, Urbana, IL - USA

• Document type: Journal article
• Source: ENGINEERING FRACTURE MECHANICS; v. 146, p. 185-209, SEP 2015.
• Web of Science Citations: 18

Abstract

This work extends a micromechanics model for cleavage fracture incorporating effects of plastic strain to determine the reference temperature, T-0, for an A515 Gr 65 pressure vessel steel based on a modified Weibull stress ((sigma) over bar (w)). Non-linear finite element analyses for 3-D models of plane-sided SE(B) and PCVN specimens define the relationship between (sigma) over bar (w) and J from which the variation of fracture toughness across different crack configurations is predicted. The modified Weibull stress methodology yields estimates of T-0 from small fracture specimens which are in good agreement with the corresponding estimates derived from testing of larger crack configurations. (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