Buckle-driven delamination models for laminate strength prediction and damage tolerant design
| Autor: | Jiraphant Srisuriyachot, Richard Butler, Mark W.D. Nielsen, Andrew Rhead, Anton Köllner |
|---|---|
| Přispěvatelé: | European Commission Directorate-General for Research and Innovation |
| Rok vydání: | 2021 |
| Předmět: |
Strain energy release rate
business.industry Computer science Mechanical Engineering Delamination 020101 civil engineering 02 engineering and technology Building and Construction Structural engineering Composite laminates Compression (physics) Civil Engineering Finite element method 0901 Aerospace Engineering 0905 Civil Engineering 0201 civil engineering 020303 mechanical engineering & transports 0203 mechanical engineering Deformation (engineering) business Buckle Damage tolerance Civil and Structural Engineering 0913 Mechanical Engineering |
| Zdroj: | Thin-Walled Structures |
| ISSN: | 0263-8231 |
| DOI: | 10.1016/j.tws.2021.107468 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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