Design of four-point SENB specimens with stable crack growth

Jeppe Bjørn Jørgensen*, Casper Kildegaard, Bent F. Sørensen

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

A four-point single-edge-notch-beam (SENB) test specimen loaded in displacement control (fixed grip) is proposed for studying crack deflection at bi-material interfaces. In order to ensure stable crack growth, a novel analytical model of the four-point SENB specimen in fixed grip is derived and compared with numerical models. Model results show that the specimen should be short and thick, and the start-crack length should be deep for the crack to propagate stable towards the bi-material interface. Observations from experimental tests of four-point SENB specimens with different start-crack lengths, confirmed that the crack grows stable if the start-crack length is deep and unstable if not.
Original languageEnglish
JournalEngineering Fracture Mechanics
Volume191
Pages (from-to)168-186
Number of pages19
ISSN0013-7944
DOIs
Publication statusPublished - 2018

Keywords

  • Adhesive
  • Bonded joints
  • Brittle fracture
  • Finite element analysis
  • Stable crack growth

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