Void growth and damage ahead of a crack in pressure-sensitive dilatant polymers

H. B. Chew, T. F. Guo, L. Cheng

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

Abstract

The deformation of amorphous polymers is highly sensitive to hydrostatic pressure and the plastic flow is non-volume preserving. Failure of these materials is often preceded by the formation of small crack-like defects known as crazes, bridged by the fibrils of the polymer. In this work, a population of discrete voids is placed ahead of a crack within a boundary layer configuration to study the effects of pressure-sensitivity a and plastic dilatancy β on void growth and damage in polymeric materials. Results show that high pressure-sensitivity significantly increases both the intensity and spatial extent of damage, which could promote crazing. These effects can be compounded as the deviation from the associated flow rule, |β- α|, increases. This study offers some evidence of pressure-sensitivity and plastic dilatancy as the major contributing parameters to the formation and growth of microporous crazing zones in polymers.

Original languageEnglish (US)
Title of host publicationHigh Performance Structures and Materials III
Pages501-510
Number of pages10
DOIs
StatePublished - Dec 1 2006
Externally publishedYes
Event3rd International Conference on High Performance Structures and Materials 2006, HPSM06 - Ostend, Belgium
Duration: May 3 2006May 5 2006

Publication series

NameWIT Transactions on the Built Environment
Volume85
ISSN (Print)1743-3509

Other

Other3rd International Conference on High Performance Structures and Materials 2006, HPSM06
CountryBelgium
CityOstend
Period5/3/065/5/06

Keywords

  • Coalescence
  • Plastic dilatancy
  • Polymer
  • Pressure-sensitive yielding
  • Void growth

ASJC Scopus subject areas

  • Architecture
  • Civil and Structural Engineering
  • Building and Construction
  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Arts and Humanities (miscellaneous)
  • Transportation
  • Safety Research
  • Computer Science Applications

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  • Cite this

    Chew, H. B., Guo, T. F., & Cheng, L. (2006). Void growth and damage ahead of a crack in pressure-sensitive dilatant polymers. In High Performance Structures and Materials III (pp. 501-510). (WIT Transactions on the Built Environment; Vol. 85). https://doi.org/10.2495/HPSM06049