State rate, grain size and material constant dependence of dynamic stress intensity factor by dynamical piling-up of dislocations

Toshimitsu Yokobori, Takeshi Isogai, Hiroshi Nishi, Takuzo Kako

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A computer simulation concerning the dynamic stress intensity factor, Kd(t), was carried out for various material constants. The constitutive equation of Kd(t) was formulated as a function of stress rate, grain size and material constants. This theory corresponds to the effect of stress rate on experimental results of the yield stress and the fracture toughness under room temperature. Furthermore, the mechanical characteristics of the dimensional value of the dislocation-free zone for free expansion were analyzed for various materials, and Kd(t) was estimated from the dislocation-free zone.

Original languageEnglish
Pages (from-to)1570-1576
Number of pages7
JournalNippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume56
Issue number527
Publication statusPublished - 1990 Jul
Externally publishedYes

ASJC Scopus subject areas

  • Mechanical Engineering

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