Keynote Speakers

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Prof. Christophe Bouvet

Institut Supérieur de l'Aéronautique et de l'espace (ISAE-SUPERAERO) - Christophe Bouvet currently works at the ISAE-SUPAERO and at ICA (Institut Clément Ader), Toulouse, FRANCE. Christophe’s expertise is in the mechanics of composites with a particular interest in composite damage mechanics and the crashworthiness of composite structures.

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A review & perspectives for composites impact analysis

Prof. Anthony Pickett

Universität Stuttgart · Institute of Aircraft Systems - Undergraduate and postgraduate degrees were undertaken at the University of Surrey, UK, followed by twenty years in industry; 16 years of which were as Technical Manager at Engineering Systems International (ESI GmbH) in Germany. Anthony then joined Cranfield University as a Professor in the Advanced Materials group, undertaking research and teaching in Finite Element simulation and composites materials. In 2007 he returned to Germany to undertake research and teaching at the Institut für Flugzeugbau and also to work as technical director at ESI GmbH.


Composites impact analysis techniques used today are largely based on models and methods established over 25 years ago. Early non-interactive intra-ply failure criteria have evolved with many enhancements, so that the most recent models now include coupled matrix and fibre failure for tension and compression, including laws for plasticity and damage evolution. Inter-ply delamination is largely treated as a decoupled event with an energy-based criterion to control crack initiation and crack propagation. These two principle failure mechanisms are usually combined by stacking elements to represent individual plies, or sub-set of plies, that are then tied with the delamination model. This approach can be computationally expensive in an explicit FE scheme, but it is reliable and has proven to be effective.

Despite these advances and many reported validation studies there are still challenges. Only limited work has investigated failure criteria for bi-axial woven composites or considered the effect that fabric shear from draping has on failure behaviour. Some models use fracture toughness to alleviate mesh dependency problems, but damage propagation that is truly mesh independent is still an issue. Modelling techniques for axial crushing are simplistic and depend on properties from appropriate testing. Indeed, concerns could be raised regarding the accuracy of failure data obtained from several standardised test procedures. This presentation will briefly review some of these issues and discuss possibilities for improved composites impact and crash simulation.

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Dr. Benedetto Gambino

Leonardo-Finmeccanica - More Information coming soon.

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