Interfacial Crack Arrest in Sandwich Panels with Embedded Crack Stoppers Subjected to Fatigue Loading

G. Martakos, J. H. Andreasen, Christian Berggreen, O. T. Thomsen

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Abstract

A novel crack arresting device has been implemented in sandwich panels and tested using a special rig to apply out-of-plane loading on the sandwich panel face-sheets. Fatigue crack propagation was induced in the face-core interface of the sandwich panels which met the crack arrester. The effect of the embedded crack arresters was evaluated in terms of the achieved enhancement of the damage tolerance of the tested sandwich panels. A finite element (FE) model of the experimental setup was used for predicting propagation rates and direction of the crack growth. The FE simulation was based on the adoption of linear fracture mechanics and a fatigue propagation law (i.e. Paris law) to predict the residual fatigue life-time and behaviour of the test specimens. Finally, a comparison between the experimental results and the numerical simulations was made to validate the numerical predictions as well as the overall performance of the crack arresters.
Original languageEnglish
JournalApplied Composite Materials
Volume24
Pages (from-to)55-76
ISSN0929-189X
DOIs
Publication statusPublished - 2017

Keywords

  • Composites
  • Fatigue
  • Finite element analysis
  • Fracture mechanics
  • Sandwich structures

Cite this

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title = "Interfacial Crack Arrest in Sandwich Panels with Embedded Crack Stoppers Subjected to Fatigue Loading",
abstract = "A novel crack arresting device has been implemented in sandwich panels and tested using a special rig to apply out-of-plane loading on the sandwich panel face-sheets. Fatigue crack propagation was induced in the face-core interface of the sandwich panels which met the crack arrester. The effect of the embedded crack arresters was evaluated in terms of the achieved enhancement of the damage tolerance of the tested sandwich panels. A finite element (FE) model of the experimental setup was used for predicting propagation rates and direction of the crack growth. The FE simulation was based on the adoption of linear fracture mechanics and a fatigue propagation law (i.e. Paris law) to predict the residual fatigue life-time and behaviour of the test specimens. Finally, a comparison between the experimental results and the numerical simulations was made to validate the numerical predictions as well as the overall performance of the crack arresters.",
keywords = "Composites, Fatigue, Finite element analysis, Fracture mechanics, Sandwich structures",
author = "G. Martakos and Andreasen, {J. H.} and Christian Berggreen and Thomsen, {O. T.}",
year = "2017",
doi = "10.1007/s10443-016-9514-3",
language = "English",
volume = "24",
pages = "55--76",
journal = "Applied Composite Materials",
issn = "0929-189X",
publisher = "Springer Netherlands",

}

Interfacial Crack Arrest in Sandwich Panels with Embedded Crack Stoppers Subjected to Fatigue Loading. / Martakos, G.; Andreasen, J. H.; Berggreen, Christian; Thomsen, O. T.

In: Applied Composite Materials, Vol. 24, 2017, p. 55-76.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Interfacial Crack Arrest in Sandwich Panels with Embedded Crack Stoppers Subjected to Fatigue Loading

AU - Martakos, G.

AU - Andreasen, J. H.

AU - Berggreen, Christian

AU - Thomsen, O. T.

PY - 2017

Y1 - 2017

N2 - A novel crack arresting device has been implemented in sandwich panels and tested using a special rig to apply out-of-plane loading on the sandwich panel face-sheets. Fatigue crack propagation was induced in the face-core interface of the sandwich panels which met the crack arrester. The effect of the embedded crack arresters was evaluated in terms of the achieved enhancement of the damage tolerance of the tested sandwich panels. A finite element (FE) model of the experimental setup was used for predicting propagation rates and direction of the crack growth. The FE simulation was based on the adoption of linear fracture mechanics and a fatigue propagation law (i.e. Paris law) to predict the residual fatigue life-time and behaviour of the test specimens. Finally, a comparison between the experimental results and the numerical simulations was made to validate the numerical predictions as well as the overall performance of the crack arresters.

AB - A novel crack arresting device has been implemented in sandwich panels and tested using a special rig to apply out-of-plane loading on the sandwich panel face-sheets. Fatigue crack propagation was induced in the face-core interface of the sandwich panels which met the crack arrester. The effect of the embedded crack arresters was evaluated in terms of the achieved enhancement of the damage tolerance of the tested sandwich panels. A finite element (FE) model of the experimental setup was used for predicting propagation rates and direction of the crack growth. The FE simulation was based on the adoption of linear fracture mechanics and a fatigue propagation law (i.e. Paris law) to predict the residual fatigue life-time and behaviour of the test specimens. Finally, a comparison between the experimental results and the numerical simulations was made to validate the numerical predictions as well as the overall performance of the crack arresters.

KW - Composites

KW - Fatigue

KW - Finite element analysis

KW - Fracture mechanics

KW - Sandwich structures

U2 - 10.1007/s10443-016-9514-3

DO - 10.1007/s10443-016-9514-3

M3 - Journal article

VL - 24

SP - 55

EP - 76

JO - Applied Composite Materials

JF - Applied Composite Materials

SN - 0929-189X

ER -