Numerical fracture analysis and model validation for disbonded honeycomb core sandwich composites

Research output: Contribution to journalJournal article – Annual report year: 2019Researchpeer-review

Standard

Numerical fracture analysis and model validation for disbonded honeycomb core sandwich composites. / Farshidi, Arash; Berggreen, Christian; Schäuble, Ralf.

In: Composite Structures, Vol. 210, 2019, p. 231-238.

Research output: Contribution to journalJournal article – Annual report year: 2019Researchpeer-review

Harvard

APA

CBE

MLA

Vancouver

Author

Bibtex

@article{35a2bca9abbc44f7be8a9435ad8f9e9a,
title = "Numerical fracture analysis and model validation for disbonded honeycomb core sandwich composites",
abstract = "Disbond damage propagation in honeycomb core sandwich structures is investigated numerically and experimentally. A fully parametric two-dimensional finite element model of a disbonded honeycomb core sandwich specimen is presented. Energy release rate and mode-mixity were numerically determined using the Crack Surface Displacement Extrapolation (CSDE) method. An advanced method was adopted to obtain the homogenized mechanical properties of the honeycomb core based on the geometry of a single honeycomb cell and the material properties of the cell wall paper. The numerical model was benchmarked against CFRP/Nomex{\^A}{\circledR} Single Cantilever Beam (SCB) specimen tests and a closed-form semi-analytical model. The results show a close agreement between analytical, numerical and experimental energy release rate, as well as analytical and numerical mode-mixity. An extensive sensitivity analysis was also carried out and the effects of the geometry and the material properties of the SCB specimen on the energy release rate and mode-mixity have been investigated.",
keywords = "Crack Surface Displacement Extrapolation (CSDE), Disbond/debond, Energy release rate, Honeycomb core, Mode-mixity, Single Cantilever Beam (SCB)",
author = "Arash Farshidi and Christian Berggreen and Ralf Sch{\"a}uble",
year = "2019",
doi = "10.1016/j.compstruct.2018.11.052",
language = "English",
volume = "210",
pages = "231--238",
journal = "Composite Structures",
issn = "0263-8223",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Numerical fracture analysis and model validation for disbonded honeycomb core sandwich composites

AU - Farshidi, Arash

AU - Berggreen, Christian

AU - Schäuble, Ralf

PY - 2019

Y1 - 2019

N2 - Disbond damage propagation in honeycomb core sandwich structures is investigated numerically and experimentally. A fully parametric two-dimensional finite element model of a disbonded honeycomb core sandwich specimen is presented. Energy release rate and mode-mixity were numerically determined using the Crack Surface Displacement Extrapolation (CSDE) method. An advanced method was adopted to obtain the homogenized mechanical properties of the honeycomb core based on the geometry of a single honeycomb cell and the material properties of the cell wall paper. The numerical model was benchmarked against CFRP/Nomex® Single Cantilever Beam (SCB) specimen tests and a closed-form semi-analytical model. The results show a close agreement between analytical, numerical and experimental energy release rate, as well as analytical and numerical mode-mixity. An extensive sensitivity analysis was also carried out and the effects of the geometry and the material properties of the SCB specimen on the energy release rate and mode-mixity have been investigated.

AB - Disbond damage propagation in honeycomb core sandwich structures is investigated numerically and experimentally. A fully parametric two-dimensional finite element model of a disbonded honeycomb core sandwich specimen is presented. Energy release rate and mode-mixity were numerically determined using the Crack Surface Displacement Extrapolation (CSDE) method. An advanced method was adopted to obtain the homogenized mechanical properties of the honeycomb core based on the geometry of a single honeycomb cell and the material properties of the cell wall paper. The numerical model was benchmarked against CFRP/Nomex® Single Cantilever Beam (SCB) specimen tests and a closed-form semi-analytical model. The results show a close agreement between analytical, numerical and experimental energy release rate, as well as analytical and numerical mode-mixity. An extensive sensitivity analysis was also carried out and the effects of the geometry and the material properties of the SCB specimen on the energy release rate and mode-mixity have been investigated.

KW - Crack Surface Displacement Extrapolation (CSDE)

KW - Disbond/debond

KW - Energy release rate

KW - Honeycomb core

KW - Mode-mixity

KW - Single Cantilever Beam (SCB)

U2 - 10.1016/j.compstruct.2018.11.052

DO - 10.1016/j.compstruct.2018.11.052

M3 - Journal article

VL - 210

SP - 231

EP - 238

JO - Composite Structures

JF - Composite Structures

SN - 0263-8223

ER -