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Structure Optimization of Projectile during Highspeed Normal Penetrating Considering Bending Failure

CHENG WU, XIAO-JUN SHEN, XIAO-MING WANG, WEI-BING LI, YU ZHENG

Abstract


In order to study the bending failure of projectile during high-speed normal penetration into concrete, a dimensionless bending factor is introduced according to the failure modes of projectile, and the dimensionless stress of dangerous cross section is calculated according to Forrestal’s resistance formula. Further, bending failure criterion of the normal penetrating projectile is proposed, i.e., when dimensionless bending factor is greater than 6.8 and dimensionless stress of dangerous cross section is greater than 0.70, the bending failure of the projectile occurs. According to the failure criterion and the no upsetting condition of hollow part, optimization of maximum charge volume and the corresponding projectile structure without bending failure are given, then, the bending failure criterion and the optimized structure of the projectile are verified by numerical simulation.

Keywords


mechanics of explosion; bending failure criteria; structure optimization; penetration; numerical simulation


DOI
10.12783/ballistics2017/16973

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