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Effects of prestrain on the fracture properties of pressure vessel steel

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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.

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Author notes

  1. Hideo Kitagawa

    Present address: Nppon University, Japan

Authors and Affiliations

  1. Department of Mechanics, Huazbong University of Science and Technology, Wuhan, Peoples' Republic of China

    Zhu Hanxing, Li Guangxia, Li Changchun & Hideo Kitagawa

Authors
  1. Zhu Hanxing
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  2. Li Guangxia
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  3. Li Changchun
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  4. Hideo Kitagawa
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Hanxing, Z., Guangxia, L., Changchun, L. et al. Effects of prestrain on the fracture properties of pressure vessel steel. Int J Fract 53, 291–299 (1992). https://doi.org/10.1007/BF00017342

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  • DOI: https://doi.org/10.1007/BF00017342

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