Fracture prediction simulation for crystalline polymer using homogenized molecular chain plasticity and craze evolution models

Hideyuki Hara, Kazuyuki Shizawa

研究成果: Conference contribution

抜粋

The fracture of ductile polymers occurs on the boundary between the molecular chain-oriented and non-oriented regions after the neck propagation. This behavior is caused by the concentration of craze that is a microscopic damage typically observed in polymers. In addition, it is known that the ductility of polymers decreases both at a high and a low strain rates in comparison with that at a middle one. In this paper, FE simulations are carried out for a crystalline polymer subjected to the tensile load at some strain rates by use of a homogenized molecular chain plasticity model and a craze evolution equation based on the chemical kinetics. Furthermore, failure criteria are proposed from an experiment on fibril strength. A fracture prediction based on the craze accumulation and the failure of fibrils is demonstrated applying the criteria to the numerical results. It is indicated that the fracture occurs at a smaller strain under a high and a low strain rate conditions than under a middle one.

元の言語English
ホスト出版物のタイトルAdvances in Engineering Plasticity XII
出版者Trans Tech Publications Ltd
ページ193-198
ページ数6
ISBN(印刷物)9783038352266
DOI
出版物ステータスPublished - 2015 1 1
イベント12th Asia-Pacific Conference on Engineering Plasticity and Its Application, AEPA 2014 - Kaohsiung, Taiwan, Province of China
継続期間: 2014 9 12014 9 5

出版物シリーズ

名前Key Engineering Materials
626
ISSN(印刷物)1013-9826

Other

Other12th Asia-Pacific Conference on Engineering Plasticity and Its Application, AEPA 2014
Taiwan, Province of China
Kaohsiung
期間14/9/114/9/5

    フィンガープリント

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

これを引用

Hara, H., & Shizawa, K. (2015). Fracture prediction simulation for crystalline polymer using homogenized molecular chain plasticity and craze evolution models. : Advances in Engineering Plasticity XII (pp. 193-198). (Key Engineering Materials; 巻数 626). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/KEM.626.193