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Damage Tolerance of aircraft fuselage structures has a strong link to explosion resistance. Though accidental explosions can and do occur, intentional explosions are more common as the terrorist threat increases. Structural toughness is as welcome in these
scenarios as it is under penetration of non contained engine debris. Characterisation and vulnerability of existing monolithic aluminium structures as well as modern laminated materials (Glare, CFRP).is undertaken in this four year program. It aims at understanding typical catastrophic failure behaviour on a dynamic materials and mechanical level and improving this through well-balanced design guidelines. Explosion resistance in aircraft design Currently there is no airworthiness regulation specifically addressing vulnerability towards internal explosions. Materials and structures overview in relation to explosion resistance. CFRP structures are not very common yet in civil transport aircraft. For defining ‘typical structure, we may look at the new Boeing 787 structure for typical design details. It becomes obvious that the skin-frame connection has a more or less conventional configuration using bolts for load transfer. Crack initiation in flat sheets, BB2 Crack propagation in prestressed flat sheet, Crack propagation in cylindrical configuration, Test set-up pre-stressed sheet experiment, Crack stability and propagation, Crack propagation velocity for experiment 4 with initial crack 280 mm and 260 mm crack extension path on both ends.
Tags : civil transport aircraft, propagation velocity, accidental explosions, aircraft fuselage, failure behaviour, aluminium structures, internal explosions, damage tolerance, boeing 787, mechanical level, dynamic materials, catastrophic failure, cfrp, aircraft structure, configuration test
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