Modified hagg and sankey metod to estimate the ballistic behaviour of lightweight metal/composite/ceramic armour and a fuselage skin of an aircraft

• Autorzy: Klimaszewski S. , Woch M.
• Języki publikacji: EN

Abstrakty

EN

Hagg and Sankey method assesses the functionality of containment rings, which prevent perforation of an aircraft's elements from turbine engine disc fragments after disc burst. However, the method assumption was based on studies of mechanism of destruction of ballistic shields made of among others ceramics, by small arms bullets. The hard ceramic facing of the ballistic shield blunts the projectile and breaks up the projectile's hard core used for armour piercing. As an impact result, a conoid of finely pulverized ceramic dust is formed, absorbing energy in the formation process. The dust, containing the remnants of the projectile's energy hits the backing, but is now spread over a larger area. With backings made of fibre, energy is absorbed in stretching, breaking and delamination. With backings made of ductile metal, energy is absorbed in elastic deformation. Modification of the method consisted of taking into account the stratification of the ceramic-metal composite and the occurrence of an aircraft stiffened skin, in order to better assess the effectiveness of ballistic shields. The concept of estimating the resistance was based on the described destruction mechanism, where the object of analysis is a metal containment ring with an additional ceramic protective ballistic shield. A comparison of two scenarios- with and without an additional 2 mm aluminum alloy skin was taken into account. For this particular scenario, results were sufficient for both of the two analyzed endurance criteria.

Słowa kluczowe

EN

reliability; ballistic shield; bullets perforation

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2012
• Tom: Vol. 19, No. 2
• Strony: 245--252
• Opis fizyczny: Bibliogr. 4 poz., rys.

Twórcy

autor

Klimaszewski S.

autor

Woch M.

• Air Force Institute of Technology Division for Reliability and Safety of Aeronautical Systems Księcia Bolesława Street 6, 01-494 Warsaw, Poland tel.: [phone], fax: [phone],

Bibliografia

• [1] Presley, K. L., Assessment of an Advanced Containment System, DOT/FAA/AR-97/82. February 1999.
• [2] Florence, A. L., Interaction of Projectiles and Composite Armor, Part II, AMMRC CR 69-15, NTIS AD 698543, August 1969.
• [3] Hagg, A. C., Sankey, G. O. The Containment of Disk Burst Fragments by Cylindrical Shells Journal of Engineering for Power, Trans. ASME, Paper No. 73-WAPwr-2.
• [4] Lundin, S. J., Engine Debris Fuselage Penetration Testing Phase II, DOT/FAA/AR-01/27,II. September 2002.