The effect of strain rate on the orientation of the fracture plane in a unidirectional polymer matrix composite under transverse compression loading

Michael May, Noah Ledford, Matti Isakov, Philipp Hahn, Hanna Paul, Sumito Nagasawa

Research output: Contribution to journalArticlepeer-review

Abstract

Transverse compression tests on a unidirectional composite were performed under quasi-static and high-rate loading conditions using servo-hydraulic machines as well as a direct impact Hopkinson bar. Aside the expected increase of compressive strength with increasing loading rate, a change of fracture plane orientation was observed. For quasi-static loading conditions, the fracture angle was 54.5°, for high rate-loading conditions this increased to 65°. Assuming a Mohr-Coulomb type of fracture for unidirectional composites under transverse compression loading, the change of fracture plane orientation indicates a rate dependency of the internal friction angle ϕ, which has not previously been reported for composite materials.

Original languageEnglish
Article number106057
JournalComposites Part A: Applied Science and Manufacturing
Volume138
DOIs
Publication statusPublished - 2020 Nov

Keywords

  • A. Polymer-matrix composites (PMC)
  • B. Fracture
  • B. Impact behaviour
  • D. Mechanical testing
  • Hopkinson Pressure Bar

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials

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