Sandwich structures

Sandwich structures are widely used in various engineering fields due to their lightweight and their excellent structural performance. Their potential has been proven during the last years; their performance under various loads and environmental conditions was widely investigated. Innovative sandwich concepts are lately introduced to further exploit the benefits of sandwich panels by implementing novel additive manufacturing techniques and metamaterial concepts.

Innovative structural concepts

– Integration of structural and architectural functions
– Architected sandwich cores, complex shapes 
– Additive manufacturing

Fracture mechanics

– Mixed-Mode fracture experimental investigation
– Failure mode analysis, fiber bridging, debonding
– Modeling and lifetime assessment

Experimental verification

– Design validation 
– Effects of long-term loading and weathering
– Durability analysis  

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Completed PhD theses

Two-dimensional quasi-static delamination in composite laminates under Mode-I and Mode II conditions
C. Wang, T. Keller and A. Vassilopoulos (Dirs.). EPFL, Lausanne, 2024.

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Composite sandwich bridge decks on fire
N. Vahedi, T. Keller and A. Vassilopoulos (Dirs.). EPFL, Lausanne, 2022.

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Two-dimensional crack growth in FRP laminates and sandwich panels
A. Cameselle Molares, T. Keller and A. Vassilopoulos (Dirs.). EPFL, Lausanne, 2019.
Abstract – Full Text

Biaxial wrinkling of thin-walled GFRP webs in cell-core sandwiches
B. Dehghan Manshadi, T. Keller and A. Vassilopoulos (Dirs.).EPFL, Lausanne, 2011.
Abstract – Full Text

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