Predicting embrittlement of polymer glasses using a hydrostatic stress criterion

C.C.W.J. Clarijs, Vito Leo, Marc J.W. Kanters, Lambert C.A. van Breemen, Leon E. Govaert (Corresponding author)

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)
59 Downloads (Pure)

Abstract

In this study, the aging-induced embrittlement of three polymer glasses is investigated using a previously developed hybrid experimental–numerical method. The evolution of yield stress of unnotched tensile bars upon aging is coupled to the evolution of embrittlement of notched tensile bars using a numerical model combined with a critical hydrostatic stress criterion that determines the onset of failure. The time-to-embrittlement of notched tensile bars with a different notch geometry is predicted and in good agreement with the experimentally determined value. Next to that, the approach is extended to three polysulfone polymers, and it is shown that the value of the critical hydrostatic stress correlates well with the polymers entanglement density: : polymers with a denser entangled network display higher values, that is, a higher resistance against incipient cavitation.

Original languageEnglish
Article number47373
Number of pages14
JournalJournal of Applied Polymer Science
Volume136
Issue number17
DOIs
Publication statusPublished - 5 May 2019

Keywords

  • aging
  • mechanical properties
  • structure–property relationships
  • theory and modeling
  • thermoplastics
  • Property relationships
  • Thermoplastics
  • Aging
  • Mechanical properties
  • Theory and modeling
  • Structure

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