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Structural Integrity of a Medium Caliber Ogive Shaped Projectile During Concrete Penetration

KAMLESH KUMAR, S. HARIKRISHNAN, K.K. KULHARE, K.P.S. MURTHY

Abstract


Projectiles experience severe stress conditions during impact and subsequent penetration in concrete due to target resistance. Structural integrity of projectile needs to be maintained during penetration for ensuring the operation of fuzing/initiating mechanism as well as preventing any unintended initiation of explosive during impact or penetration. This paper presents a methodology to use Forrestal formulations to arrive at initial design of an ogive nosed penetrator. Forrestal formulae necessitate experiments to obtain total penetration. A methodology is presented in which total penetration obtained from Conventional Weapon formula has been used in Forrestal formulations to estimate the resistive force offered by the concrete target. This resistive force is used to estimate the axial stress condition of penetrating projectile. These formulations have been used to design a 14 kg ogive nosed penetrator impacting with 500 m/s velocity against concrete target having compressive strength of 35 MPa.

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