RETRACTED ARTICLE: Penetrator strength effect in long-rod critical ricochet angle

Daneshjou, K.; Shahravi, Majid

doi:10.1007/s12206-008-0606-3

Cited by 2 publications

(3 citation statements)

References 29 publications

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“…In order to evaluate numerical efficiency, the bisection method and the secant method expressed in (7) and (8) are employed to find the CRA which meets the convergence criteria in the oblique angle range of 40 to 60 degree. Figures 13 and 14 show the input oblique angle and the projectile position at 3.2 ms after impact with respect to numerical iteration number for both methods, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…This phenomenon called the ricochet and especially critical oblique angle which represents the minimum oblique angle that will produce the ricochet behavior is essential to ensure the performance of the penetrator warhead. Many experimental, theoretical, and computational studies on the ricochet of various types of the projectiles and targets have been conducted at oblique angles [6][7][8][9]. Tate [6] first evaluated the ricochet of long-rod type projectiles using a simplified analytical model and extended the work [7] by modifying the analytic model to include the effect of target strength and deformation of the projectile.…”

Section: Introductionmentioning

confidence: 99%

“…However, due to the physical complexity of the oblique penetration, experimental and numerical methods have been conducted to evaluate the critical ricochet angle (CRA) of long-rod type projectile only [7]. Daneshjou and Shahravi [8] calculated CRA with a full 3D explicit finite element method for various impact velocities, strength of target plates, and projectiles. In addition, studies about CRA for bullet were established on different target materials [9].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Efficient Method to Evaluate Critical Ricochet Angle of Projectile Penetrating into a Concrete Target

Choi

Han

Park

et al. 2018

Mathematical Problems in Engineering

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In this study, we propose an efficient computation method to estimate the critical ricochet angle (CRA) for oblique penetration into concrete targets which is based on the spherical cavity-expansion theory. During penetrating event, the resistance force on the projectile nose is approximated by semi-empirical function from the spherical cavity-expansion theory and projectile motion of oblique penetration is predicted to verify the proposed numerical method with the aid of finite differential approach. In order to enhance the accuracy of projectile motion, the empirical constants of the semi-empirical function are obtained with respect to the oblique angle by conducting finite element analyses of the oblique penetration. CRA is then obtained by predicting the projectile motion at the various oblique angles and verified with results of finite element analysis. Our work presents that the reliable CRA can be estimated efficiently by employing a series of the numerical simulations. We believe that our proposed numerical method will provide a useful analysis platform for designing penetrator warhead which hits the target at an oblique impact angles.

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Section: Resultsmentioning

confidence: 99%