Experimental investigation of interfacial crack arrest in sandwich beams subjected to fatigue loading using a novel crack arresting device

G. Martakos, J.H. Andreasen, C. Berggreen, O. Thomsen

Research output: Contribution to journalArticle (Academic Journal)peer-review

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Abstract

A recently proposed face-sheet/core interface crack arresting device is implemented in sandwich beams and tested using the Sandwich Tear Test (STT) configuration. Fatigue loading conditions are applied to propagate the crack and determine the effect of the crack stopper on the fatigue growth rate and arrest of the crack. Digital image correlation is used through the duration of the fatigue experiment to track the strain evolution as the crack tip advances. The measured strains are related to crack tip propagation, arrest, and re-initiation of the crack. A finite element model is used to calculate the energy release rate, mode mixity and to simulate crack propagation and arrest of the crack. Finally the effectiveness of the crack arresting device is demonstrated on composite sandwich beams subjected to fatigue loading conditions.
Original languageEnglish
Pages (from-to)401-421
Number of pages21
JournalJournal of Sandwich Structures and Materials
Volume21
Issue number2
Early online date1 Mar 2017
DOIs
Publication statusPublished - 1 Feb 2019

Keywords

  • fatigue
  • fracture mechanics
  • composites
  • finite element analysis
  • Sandwich structures

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