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

Hideyuki Hara, Kazuyuki Shizawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publicationKey Engineering Materials
PublisherTrans Tech Publications Ltd
Pages193-198
Number of pages6
Volume626
ISBN (Print)9783038352266
DOIs
Publication statusPublished - 2015
Event12th Asia-Pacific Conference on Engineering Plasticity and Its Application, AEPA 2014 - Kaohsiung, Taiwan, Province of China
Duration: 2014 Sep 12014 Sep 5

Publication series

NameKey Engineering Materials
Volume626
ISSN (Print)10139826

Other

Other12th Asia-Pacific Conference on Engineering Plasticity and Its Application, AEPA 2014
CountryTaiwan, Province of China
CityKaohsiung
Period14/9/114/9/5

Fingerprint

Plasticity
Polymers
Crystalline materials
Strain rate
Reaction kinetics
Ductility
Experiments

Keywords

  • Craze
  • Crystalline polymer
  • FE analysis
  • Molecular chain plasticity
  • Multiscale

ASJC Scopus subject areas

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

Cite this

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

Fracture prediction simulation for crystalline polymer using homogenized molecular chain plasticity and craze evolution models. / Hara, Hideyuki; Shizawa, Kazuyuki.

Key Engineering Materials. Vol. 626 Trans Tech Publications Ltd, 2015. p. 193-198 (Key Engineering Materials; Vol. 626).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Hara, H & Shizawa, K 2015, Fracture prediction simulation for crystalline polymer using homogenized molecular chain plasticity and craze evolution models. in Key Engineering Materials. vol. 626, Key Engineering Materials, vol. 626, Trans Tech Publications Ltd, pp. 193-198, 12th Asia-Pacific Conference on Engineering Plasticity and Its Application, AEPA 2014, Kaohsiung, Taiwan, Province of China, 14/9/1. https://doi.org/10.4028/www.scientific.net/KEM.626.193
Hara, Hideyuki ; Shizawa, Kazuyuki. / Fracture prediction simulation for crystalline polymer using homogenized molecular chain plasticity and craze evolution models. Key Engineering Materials. Vol. 626 Trans Tech Publications Ltd, 2015. pp. 193-198 (Key Engineering Materials).
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