Penetration of disk fragments following impact on thin plate
- 102 Downloads
To investigate the ballistic resistance and failure pattern of aeroengine casing following the impact of disk fragments, and to determine the optimum case structure, the phenomena of a 1/3rd disk fragment impact on single and double-layered thin plate targets were simulated using nonlinear dynamical analysis software MSC.Dytran. Strain rate effect was introduced in a Johnson-Cook (JC) material model for the disk fragment and the plate. Impact modeling was based on the Arbitrary Lagrange-Eulerian method, and simulated using explicit finite element method (FEM). Simulation results showed that the major failure pattern of the plate is shearing and tensile fracture with large plastic deformation. It was also concluded that the ballistic limit velocity increases with the standoff distance when it is beyond a certain value, and that greater resistance is obtained when the front plate has either a proportionately low or high thickness. The impact resistance of a double-layered plate may exceed that of a single plate if the thicknesses and standoff distance of the two plates are set appropriately.
Key wordsAeroengine Disk burst failure Case containment capability Ballistic limit velocity
Unable to display preview. Download preview PDF.
- Aviation Safety Network, 2006. Aircraft Accident Boeing 767-223 ER N330AA Los Angeles International Airport [EB/OL]. Available from: http://aviation-safety.net/database/record.php?id=20060602-0 [Accessed 17/02/2008]
- Dey, S., Børvik, T., Teng, X., Wierzbicki, T., Hopperstad, O.S., 2007. On the ballistic resistance of double-layered steel plates: An experimental and numerical investigation. International Journal of Solids and Structures, 44(20): 6701–6723. [doi:10.1016/j.ijsolstr.2007.03.005]CrossRefMATHGoogle Scholar
- Gupta, N.K., Iqbal, M.A., Sekhon, G.S., 2006. Experimental and numerical studies on the behavior of thin aluminum plates subjected to impact by blunt- and hemispherical-nosed projectiles. International Journal of Impact Engineering, 32(12):1921–1944. [doi:10.1016/j.ijimpeng.2005.06.007]CrossRefGoogle Scholar
- Zhou, D.W., Strong, W.J., 2008. Ballistic limit for oblique impact of thin sandwich panels and spaced plates. International Journal of Solids and Structures, 35(11): 1339–1354. [doi:10.1016/j.ijimpeng.2007.08.004]Google Scholar