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 publicationAdvances in Engineering Plasticity XII
PublisherTrans Tech Publications Ltd
Pages193-198
Number of pages6
ISBN (Print)9783038352266
DOIs
Publication statusPublished - 2015 Jan 1
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)1013-9826
ISSN (Electronic)1662-9795

Other

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

Keywords

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

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Fracture prediction simulation for crystalline polymer using homogenized molecular chain plasticity and craze evolution models'. Together they form a unique fingerprint.

Cite this