Stick-slip type crack growth during instrumented high-speed impact of HDPE and HDPE/Selar® discontinuous laminar microlayer composites

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9 Citations (Scopus)

Abstract

Stick-slip type crack growth was triggered in high-density polyethylene (HDPE) and HDPE/Selar® discontinuous laminar microlayer composites by instrumented Charpy impact under suitable test conditions (temperature -40°C, hammer speed 3.7 m/s). Fractographic analysis showed that crazing is responsible for this peculiar fracture. The onset of this stick-slip phenomenon was favored by a mixed plane strain/plane stress condition prevailing in the specimens. The relative orientation of the Selar microlayers in respect to the crack growth direction affected the stick-slip type crack growth and the related failure considerably. No stick-slip type crack propagation was observed when gasoline-plasticized specimens were impacted, which failed by ductile tearing instead of crazing.

Original languageEnglish
Pages (from-to)343-353
Number of pages11
JournalJournal of Macromolecular Science - Physics
Volume40 B
Issue number3-4
DOIs
Publication statusPublished - May 2001

Fingerprint

Stick-slip
Polyethylene
High density polyethylenes
Crack propagation
Crazing
Composite materials
Hammers
Gasoline
Temperature

Keywords

  • Blow molding
  • Discontinuous laminar composite
  • Failure
  • High-speed impact
  • Polymer microlayer composite
  • Stick-slip mechanism

ASJC Scopus subject areas

  • Materials Chemistry
  • Polymers and Plastics

Cite this

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title = "Stick-slip type crack growth during instrumented high-speed impact of HDPE and HDPE/Selar{\circledR} discontinuous laminar microlayer composites",
abstract = "Stick-slip type crack growth was triggered in high-density polyethylene (HDPE) and HDPE/Selar{\circledR} discontinuous laminar microlayer composites by instrumented Charpy impact under suitable test conditions (temperature -40°C, hammer speed 3.7 m/s). Fractographic analysis showed that crazing is responsible for this peculiar fracture. The onset of this stick-slip phenomenon was favored by a mixed plane strain/plane stress condition prevailing in the specimens. The relative orientation of the Selar microlayers in respect to the crack growth direction affected the stick-slip type crack growth and the related failure considerably. No stick-slip type crack propagation was observed when gasoline-plasticized specimens were impacted, which failed by ductile tearing instead of crazing.",
keywords = "Blow molding, Discontinuous laminar composite, Failure, High-speed impact, Polymer microlayer composite, Stick-slip mechanism",
author = "J. Karger-Kocsis",
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journal = "Journal of Macromolecular Science - Reviews in Macromolecular Chemistry and Physics",
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N2 - Stick-slip type crack growth was triggered in high-density polyethylene (HDPE) and HDPE/Selar® discontinuous laminar microlayer composites by instrumented Charpy impact under suitable test conditions (temperature -40°C, hammer speed 3.7 m/s). Fractographic analysis showed that crazing is responsible for this peculiar fracture. The onset of this stick-slip phenomenon was favored by a mixed plane strain/plane stress condition prevailing in the specimens. The relative orientation of the Selar microlayers in respect to the crack growth direction affected the stick-slip type crack growth and the related failure considerably. No stick-slip type crack propagation was observed when gasoline-plasticized specimens were impacted, which failed by ductile tearing instead of crazing.

AB - Stick-slip type crack growth was triggered in high-density polyethylene (HDPE) and HDPE/Selar® discontinuous laminar microlayer composites by instrumented Charpy impact under suitable test conditions (temperature -40°C, hammer speed 3.7 m/s). Fractographic analysis showed that crazing is responsible for this peculiar fracture. The onset of this stick-slip phenomenon was favored by a mixed plane strain/plane stress condition prevailing in the specimens. The relative orientation of the Selar microlayers in respect to the crack growth direction affected the stick-slip type crack growth and the related failure considerably. No stick-slip type crack propagation was observed when gasoline-plasticized specimens were impacted, which failed by ductile tearing instead of crazing.

KW - Blow molding

KW - Discontinuous laminar composite

KW - Failure

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KW - Polymer microlayer composite

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