A modelling and simulation on failure prediction of ductile polymer based on craze evolution and annihilation

Seiichi Kobayashi, Daisuke Tomii, Kazuyuki Shizawa

研究成果: Review article査読

34 被引用数 (Scopus)

抄録

Ductile fracture of a polymer plate due to craze growth is characterized by a failure in the front of propagating neck. In this paper, the elastoviscoplastic constitutive equation, that explicitly represents the effect of craze, is rigorously derived. Through a thermodynamic discussion about arguments of craze rate function, a new craze evolution equation is proposed so as to express the craze concentration on the boundary between the oriented molecular region and the glassy one, and the craze annihilation in the oriented region, with a hydrostatic stress criterion of craze generation. Additionally, an evolution law of mean plastic strain affecting the craze growth is numerically identified for a polymer block with some circular holes. A finite element simulation is carried out in order to verify this model. The craze propagation and annihilation are visualized, and the possibility of failure prediction based on this model is also discussed.

本文言語English
ページ(範囲)810-817
ページ数8
ジャーナルNippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
70
6
DOI
出版ステータスPublished - 2004 6

ASJC Scopus subject areas

  • 材料科学(全般)
  • 材料力学
  • 機械工学

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