Design, Optimization and Validation of Constant and Variable Angle Tow Composite Cylindrical Shells

When: 
6 August 2019 - 11:30am to 12:30pm
Venue: 
J17 Ainsworth Building, 4th Floor, Room 405A

UNSW School of Mechanical and Manufacturing Engineering Seminar Series

Abstract

A study regarding composite cylindrical shells, that are one of the main components of launch-vehicle shell structures, will be presented. For the next generation of launch-vehicles it will be more and more important to open the design space and introduce innovative solutions for a significant weight reduction, keeping or increasing at the same time the level of safety. These components can be buckling-critical structures, and therefore, the critical axial buckling load is an important design consideration. The ability to steer the carbon fibre tapes, varying the tow angle, can widen the designs possibilities.

The study presents new design and optimization procedures for constant and variable angle tow composites. The framework proposed involves a synergic work between finite element analyses and artificial intelligence techniques. The results of two shells tested in compression until buckling and later subjected to a vibration analysis will be also presented. They provide a useful data set of the mechanical response of constant and variable angle tow cylindrical shells, which can be applied for further validation of the developed models.

 

About the Speaker

Chiara Bisagni is Full Professor and Chair of Aerospace Structures and Computational Mechanics at the Faculty of Aerospace Engineering of Delft University of Technology in the Netherlands.

Dr. Bisagni received her Ph.D. in Aerospace Engineering at the Politecnico di Milano in Italy, where she then became Assistant and later Associate Professor in the Department of Aerospace Engineering. Before joining Delft University of Technology in January 2015, she was Full Professor at the University of California San Diego in the US.

Her research regards aerospace composite structures both in thermoset and in thermoplastic. In particular, her projects spans from buckling, post-buckling, and crashworthiness, to fatigue, damage tolerance and optimization, for aeronautical and space applications. Dr. Bisagni has funding from European Clean Sky 2 program, as well as from US AFRL and ONR, and collaborates with Airbus, Boeing, GKN/Fokker and NASA.

 

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