By C. A. Brebbia, A. A. Motta
Masking a large scope of issues regarding ballistics, this booklet includes papers offered on the 3rd overseas convention on Computational Ballistics, held June 6-8, 2007, within the New wooded area, united kingdom. Ballistics, as a technological know-how, has a large that means and is found in many features of our daily lives. Terminal ballistics, maybe its most crucial department, makes a speciality of the examine of the interplay among the munition and objective and has many civilian functions, resembling in vehicle crashes and chook moves on plane, and the ensuing results. This consists of the research of influence, total and microscopic structural resistance and behaviour, and integrity.The papers hide Fluid circulation aerodynamics; inside ballistics; Terminal ballistics; Experimental mechanics/ballistics and box checking out; New advancements in computational thoughts; and structures and expertise.
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Additional info for Computational Ballistics III
G. point decreases as the Yaw angle increase. com, ISSN 1743-355X (on-line) 18 Computational Ballistics III differences are due to Yaw angle effects which increase or decrease the petal area which is exposed to the flow field, causing the aerodynamic lift and drag force to discard the sabot at a slower or faster rate correspondingly. As may be seen, the interaction time between the sabot and the kinetic projectile rod does not exceed 2 ms for the specific sabot geometry and the given yaw angles.
Point decreases as the Yaw angle increase. com, ISSN 1743-355X (on-line) 18 Computational Ballistics III differences are due to Yaw angle effects which increase or decrease the petal area which is exposed to the flow field, causing the aerodynamic lift and drag force to discard the sabot at a slower or faster rate correspondingly. As may be seen, the interaction time between the sabot and the kinetic projectile rod does not exceed 2 ms for the specific sabot geometry and the given yaw angles. Figure 7 shows the aerodynamics force components exerted on the sabot during the discard process.
Integrating vZ from τ = 0 to τ 1 gives the deflection z1 of the projectile at the distance x1. com, ISSN 1743-355X (on-line) 26 Computational Ballistics III uniform wind of velocity wcm, defined with eqn (14). This deflection can be found by replacing in eqn (15) the variable velocity w1 ·x/x1 by the constant velocity f·w1. The solution leads to the known formula of Didion  z1 = f ⋅ w1 (v0 ⋅ τ 1 − x1 ) . v0 (18) Equating both deflections z1 and solving for f yields finally the implicit formulas for the determination of the correction factor f: m 1− 2 m V+ V − 1 m + V − V [1 + (1 − m)η ] 1− m ⋅ f (V , m) = V − 1 m ⋅η m(1 − m)(1 − 2m) ⋅ η 2 V = m ⋅η m 1 − [1 + (1 − m)η ]m −1 .