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Tension Crash Absorbers for a Composite Fuselage Application

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Tension Crash Absorbers for a Composite Fuselage Application

 

Modern civil aircraft like the Airbus A350 XWB comprise of composite materials for more than half of their structural weight. The design and manufacturing of a composite fuselage significantly differs from a metallic design, while the structure still needs to fulfil all static as well as dynamic requirements including different crash scenarios. The missing ductility of a composite beam like a fuselage frame under bending loading leads to the necessity of additional measures like the integration of specific crash absorber elements. Standard crash elements are loaded under compression forces, while crash elements based on tension mechanism are rarely investigated or even used in serial application. This paper describes the investigation of different tension crash absorber concepts for civil aircraft sub-cargo structures. The study is based on empirical as well as numerical investigations, resulting in material-specific crash performance data. The final assessment and down selection of tension absorber elements takes these specific material properties and structural integration aspects into consideration.

 

Authors: Brian Bautz, Dr. Sebastian Heimbs, and Dr. Tim Bergmann

 

Conference: SAMPE Seattle 2017

 

SKU/Code: SE17--0541

Pages: 13

 

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