 | Complexities of Add-on Armour and Remedial Measures
Author : Dikshit, S.N.
Source : Defence Science Journal ; Vol:46(2) ; 1996 ; pp 109-113
Subject : 623.41 Weapon Systems ;623.4 Armaments and Ballistics
Keywords : Antitank ammunition ;Armoured fighting vehicles
Abstract : Armoured fighting vehicles are under constant threat against newly developed antitank ammunition having higher penetration capabilities. Enhancing protection levels of existing tanks is associated with increased weight and volume penalties, affecting tactical mobility of the tank. The complexities arising in designing add-on armour are described along with the remedial measures. It is observed that even optimum add-on design calls for minor compromise in the usage of a battle tank. |
| | Influence of Hardness on Perforation Velocity in Steel Armour Plates
Author : Dikshit, S.N.
Source : Defence Science Journal ; Vol:50(1) ; 2000 ; pp 95-99
Subject : 669 Metallurgy;546.3 Metals
Keywords : Steel armour plates;Plate perforation velocity;Plate plugging velocity
Abstract : In an earlier investigation, the influence of hardness on tempered steel armour plates of 20 mm thickness, impacted by 20 mm diameter steel ogive-shaped projectile at normal, was studied. Additional data is investigated with relation to the perforation velocity of the plates. It is observed that the plate perforation velocity and the plate plugging velocity decrease with increasing plate hardness. |
| | Ballistic Behaviour of Thick Steel Armour Plate under Oblique Impact : Experimental Investigation II
Author : Dikshit, S.N.
Source : Defence Science Journal ; Vol:49(3) ; 1999 ; pp 257-262
Subject : 623.4 Armaments and Ballistics;620.1 Material Science and Technology
Keywords : Armour plates ;Armour penetration;Ballistics
Abstract : "The ballistic behaviour of thick steel armour plate at different obliquities has been investigated. Ballistic experiments were conducted in the velocity range 300-800 mls at 0°, 15°, 30° and 45° obliquity .A steel, conical projectile or 6.1 mm diameter was impacted on a 10 mm thick steel armour plate. At 30° and 45° obliquity, the plate offers protection up to a striking velocity of 800 mls. At zero obliquity, the plate provides protection below 6~ m/s. The depth of penetration decreases with increasing obliquity. The plate resistance does not decrease at higher obliquity observed in an earlier work. " |
| | Ballistic Behaviour of Thick Steel Armour Plate under Oblique Impact : Experimental Investigation
Author : Dikshit, S.N.
Source : Defence Science Journal ; Vol:48(3) ; 1998 ; pp 271-276
Subject : 620.1 Material Science and Technology
Keywords : Penetration ;Crater volume;Obliquity
Abstract : "The ballistic behaviour of thick steel armour- plate has been investigated at different obliquity when impacted by an ogive-shaped steel projectile. The ballistic experiments have been conducted in the velocity range 300-800 m/s. Both the thickness of the target plate and the diameter of the projectile were 20 mm. At 30 and 45° obliquity 20 mm plate provides full protection at 800 m/s, whereas at 0 and 15° obliquity, the plate provides protection up to 600 m/s. At 15 and 30° obliquity, the plate exhibits lesser energy absorption capacity due to higher crater volume. " |
| | Add on Armour Repair : Concepts & Techniques
Author : Dikshit, S.N.
Source : Defence Science Journal ; Vol:47(1) ; 1997 ; pp 89-96
Subject : 623.4 Armaments and Ballistics
Keywords : Repair operations ;Repair operations;Damage pattern;Battle tank;Composite armour
Abstract : "The nature of damage likely to occur to an add-on armour module due to the impact of incoming projectile is described observations are based on a series of ballistic trials at zero and oblique striking angles. Simple repair techniques have been suggested for restoring ballistic worth of the damaged composite armour on the battle tank. " |
| | User Friendly Explosives Reactive Armour a Long term Reality
Author : Dikshit, S.N.
Source : Defence Science Journal ; Vol:47(2) ; 1997 ; pp 265-273
Subject : 623.41 Weapon Systems ;623.4 Armaments and Ballistics
Keywords : Explosive reactive armour;Chemical energy missiles
Abstract : "There is a strong need to develop explosive reactive armour (ERA) for protecting battle tanks against an emerging threat of kinetic and chemical energy missiles. In this context, global trends, principle and limitations of ERA and threat perception-based types of ERA have been dwelt upon. User-friendly ERA is a long-term reality. User-friendly ERA system is thus defined to be an efficient and protective system that not only provide full protection to the tank crew, but is also harmless to the supporting infantory. The indigenously-developed ERA system is close to be termed as a user-friendly ERA. " |
| | Effect of Clamping Rigidity of the Armour on Ballistic Performance
Author : Dikshit, S.N.;Sundararajan, G.
Source : Defence Science Journal ; Vol:42(2) ; 1992 ; pp 117-120
Subject : 623.4 Armaments and Ballistics
Keywords : Armour plates;Ballistic testing;Projectiles;Impact velocity
Abstract : Influence of the manner in which the armour plates are held during their ballistic testing on the armour performance, has been evaluated. One armour plate was clamped rigidly to the test stand while a second plate of identical composition, hardness, and dimensions was hung loosely from the target holder. Both these plates were impacted with the same type of projectiles and over the same impact velocity range. The nature of ballistic damage evaluated indicates that the manner in which the armour is held during ballistic testing has a negligible influence on its performance at least when the mass of the plate is substantially higher than that of the projectile. |
| | Add on Armour Mounting Modes
Author : Dikshit, S.N.
Source : Defence Science Journal ; Vol:46(4) ; 1996 ; pp 197-206
Subject : 623.4 Armaments and Ballistics
Keywords : Function decision theory ;Armour modules
Abstract : Concepts of mounting add-on armour modules on battle tank are described. Selection of optimum mode of mounting is evaluated based on criterion function decision theory. Finding match very well with experimental observations. |
| | Ballistic Behaviour of Tempered Steel Armour Plates under Plane Strain Condition
Author : Dikshit, S.N.
Source : Defence Science Journal ; Vol:48(2) ; 1998 ; pp 167-172
Subject : 623.4 Armaments and Ballistics;620.1 Material Science and Technology
Keywords : High hardness plate ;Depth of penetration ;Projectile;Steel armour plates;Ballistic behaviour
Abstract : "The present investigation deals with the ballistic behaviour of tempered steel armour plates under plane strain condition at normal angle of attack. A conical-shaped steel projectile of 6.1 mm diameter was impacted on 20 mm thick steel armour plates of 350, 450 and 550 Hv hardness, in the velocity range 200 -700 m/s at zero obliquity. Ballistic performance measured in terms of the depth of penetration indicates that, under plane strain condition, behaviour of 550 Hv steel plate is better than those of the other two plates. However, front spalling causes damage to the entry side of the high hardness plate, thus affecting its multihit capability in a limited manner." |
