Ballistic Characteristics on Oblique Penetrating Multi-Layer Aluminium Targets by Annular Groove Projectile

Annular Groove Phase Mask Coronagraph

We present a new phase mask coronagraph consisting in an optical vortex induced by a space-variant surface relief subwavelength grating. Phase mask coronagraphy is a recent technique aiming at accommodating both high dynamic and high angular resolution imaging of faint sources around bright objects such as exoplanets orbiting their parent stars or host galaxies of active galactic nuclei. Subwav...

Paper Title: Oblique Detonation Stabilized on a Hypervelocity Projectile Authors

We present new experimental results demonstrating the initiation and stabilization of an oblique detonation by a hypervelocity projectile. Projectiles 25 mm in diameter were launched at nominal velocities of 2700 m/s into stoichiometric H2-O2-N2 mixtures at pressures between 0.1 and 2.5 bar. A critical threshold in initial pressure was found to be required for the establishment of detonations. ...

Ballistic Penetration of Multi-layered Ceramic/steel Targets

The response of multi-layered ceramic/steel targets to high velocity impact and penetration has been investigated through experiments and finite element simulations. Damage quantification and the material stresses and velocity histories provided by experiments are used as constraints to be satisfied by numerical simulations of the ballistic penetration event. Experimental and numerical observat...

تعیین تجربی زاویه بحرانی نفوذ در برخورد مایل پرتابه ها

Oblique impact of cylindrical projectiles with blunt, conical and hemispherical noses with different aspect ratios on metallic targets with different thicknesses is investigated and penetration critical angle is determined. Circular targets of Al1100-H12 had a diameter of 240mm and thicknesses of 1, 2 and 3mm. Steel work hardened projectiles with blunt, conical and hemispherical noses are made ...

Analytical Approach to Ballistic Dispersion of Projectile Weapons Based on Variant Launch Velocity