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Effects of prestrain on the fracture properties of pressure vessel steel

Zhu, Hanxing, Li, Guangxia, Li, Changchun and Hideo, Kitagawa 1992. Effects of prestrain on the fracture properties of pressure vessel steel. International Journal of Fracture 53 (3) , pp. 291-299. 10.1007/BF00017342

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Abstract

In this paper, various methods have been used to measure the effects of prestrain on the fracture toughness of 20 g steel experimentally. Based on elastic-plastic FEM analysis, the relationships between crack tip opening displacement δT and the maximum strain εmaxc have been obtained and the effects of prestrain εp on the critical fracture strain εmaxc have been examined. At the same time, based on the Rice-Tracey's void growth model [4], the cause of the void formation ahead of the crack tip, the condition of the principal crack propagation and the effects of prestrain εp on the fracture properties of 20 g steel were investigated. For ductile material there was a maximum value of V G ahead of the crack tip that was the cause of the void formation in that place. It is believed that when the maximum value of V G ahead of the crack tip reaches a critical value, it may be the principal crack propagating condition for high ductile material.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Publisher: Kluwer
ISSN: 0376-9429
Last Modified: 04 Jun 2017 06:45
URI: http://orca.cf.ac.uk/id/eprint/64475

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