Buckle-driven delamination models for laminate strength prediction and damage tolerant design

Anton Köllner; Mark W.D. Nielsen; Jiraphant Srisuriyachot; Andrew T. Rhead; Richard Butler

doi:10.1016/j.tws.2021.107468

Buckle-driven delamination models for laminate strength prediction and damage tolerant design

Anton Köllner, Mark W.D. Nielsen, Jiraphant Srisuriyachot, Andrew T. Rhead, Richard Butler

Imperial College London

Research output: Contribution to journal › Article › peer-review

12 Citations (SciVal)

Abstract

Two state-of-the-art analytical compression after impact (CAI) modelling approaches are presented and evaluated for the problem of thin-film buckle-driven propagation of a delamination in composite laminates. Characteristic phenomena are investigated by evaluating the behaviour of the energy release rate of an anisotropic sublaminate above a 2D embedded delamination. These characteristics include extension-bend, shear-bend and bend-twist coupling as well as contact of sublaminate and base laminate. A holistic approach with the aid of a detailed analysis of deformation characteristics from artificial delamination experiments and finite element analysis provide strong validation of the modelling approaches. Suggestions are made regarding analytical methods suitable for use in the initial aerospace structural design stage. It is found that models which capture the mode-mixity and post-buckled energy terms accurately will allow for better design decisions to be made that are not overly conservative. Whereas methods, which do not account for such mixity and post-buckling, can nevertheless be used to design for damage tolerance.

Original language	English
Article number	107468
Journal	Thin-Walled Structures
Volume	161
Early online date	29 Jan 2021
DOIs	https://doi.org/10.1016/j.tws.2021.107468
Publication status	Published - 30 Apr 2021

Bibliographical note

Funding Information:
Anton Köllner gratefully acknowledges funding received from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 842543 .

Funding Information:
The Bath authors gratefully acknowledge the financial support of the Engineering and Physical Sciences Research Council (EPSRC) , who fund the ADAPT project (EP/N024354/1). Richard Butler holds the Royal Academy of Engineering/GKN Aerospace Research Chair in Composites Analysis.

Funding Information:
All authors further gratefully acknowledge funding received by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) ; project number: 428504984.

Publisher Copyright:
© 2021 The Authors

Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.

Funding

Anton Köllner gratefully acknowledges funding received from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 842543 . All authors further gratefully acknowledge funding received by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) ; project number: 428504984. The Bath authors gratefully acknowledge the financial support of the Engineering and Physical Sciences Research Council (EPSRC) , who fund the ADAPT project (EP/N024354/1). Richard Butler holds the Royal Academy of Engineering/GKN Aerospace Research Chair in Composites Analysis.

Keywords

BVID
CAI
Damage tolerance
Delamination buckling
Energy release rate
Mixed-mode fracture

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction
Mechanical Engineering

Access to Document

10.1016/j.tws.2021.107468Licence: CC BY-NC-ND

Cite this

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title = "Buckle-driven delamination models for laminate strength prediction and damage tolerant design",

abstract = "Two state-of-the-art analytical compression after impact (CAI) modelling approaches are presented and evaluated for the problem of thin-film buckle-driven propagation of a delamination in composite laminates. Characteristic phenomena are investigated by evaluating the behaviour of the energy release rate of an anisotropic sublaminate above a 2D embedded delamination. These characteristics include extension-bend, shear-bend and bend-twist coupling as well as contact of sublaminate and base laminate. A holistic approach with the aid of a detailed analysis of deformation characteristics from artificial delamination experiments and finite element analysis provide strong validation of the modelling approaches. Suggestions are made regarding analytical methods suitable for use in the initial aerospace structural design stage. It is found that models which capture the mode-mixity and post-buckled energy terms accurately will allow for better design decisions to be made that are not overly conservative. Whereas methods, which do not account for such mixity and post-buckling, can nevertheless be used to design for damage tolerance.",

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note = "Funding Information: Anton K{\"o}llner gratefully acknowledges funding received from the European Union{\textquoteright}s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 842543 . Funding Information: The Bath authors gratefully acknowledge the financial support of the Engineering and Physical Sciences Research Council (EPSRC) , who fund the ADAPT project (EP/N024354/1). Richard Butler holds the Royal Academy of Engineering/GKN Aerospace Research Chair in Composites Analysis. Funding Information: All authors further gratefully acknowledge funding received by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) ; project number: 428504984. Publisher Copyright: {\textcopyright} 2021 The Authors Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",

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N2 - Two state-of-the-art analytical compression after impact (CAI) modelling approaches are presented and evaluated for the problem of thin-film buckle-driven propagation of a delamination in composite laminates. Characteristic phenomena are investigated by evaluating the behaviour of the energy release rate of an anisotropic sublaminate above a 2D embedded delamination. These characteristics include extension-bend, shear-bend and bend-twist coupling as well as contact of sublaminate and base laminate. A holistic approach with the aid of a detailed analysis of deformation characteristics from artificial delamination experiments and finite element analysis provide strong validation of the modelling approaches. Suggestions are made regarding analytical methods suitable for use in the initial aerospace structural design stage. It is found that models which capture the mode-mixity and post-buckled energy terms accurately will allow for better design decisions to be made that are not overly conservative. Whereas methods, which do not account for such mixity and post-buckling, can nevertheless be used to design for damage tolerance.

AB - Two state-of-the-art analytical compression after impact (CAI) modelling approaches are presented and evaluated for the problem of thin-film buckle-driven propagation of a delamination in composite laminates. Characteristic phenomena are investigated by evaluating the behaviour of the energy release rate of an anisotropic sublaminate above a 2D embedded delamination. These characteristics include extension-bend, shear-bend and bend-twist coupling as well as contact of sublaminate and base laminate. A holistic approach with the aid of a detailed analysis of deformation characteristics from artificial delamination experiments and finite element analysis provide strong validation of the modelling approaches. Suggestions are made regarding analytical methods suitable for use in the initial aerospace structural design stage. It is found that models which capture the mode-mixity and post-buckled energy terms accurately will allow for better design decisions to be made that are not overly conservative. Whereas methods, which do not account for such mixity and post-buckling, can nevertheless be used to design for damage tolerance.

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Buckle-driven delamination models for laminate strength prediction and damage tolerant design

Abstract

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

Access to Document

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Fingerprint

ADAPT

Cite this

Buckle-driven delamination models for laminate strength prediction and damage tolerant design

Abstract

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Projects

ADAPT

Cite this