محاسبه عمق نفوذ پرتابه ها در اهداف بتنی پوشش دار (علمی-پژوهشی)

بررسی تحلیلی و عددی نفوذ پرتابه میله‌ای بلند در اهداف بتنی و بتن- فولادی (علمی-پژوهشی)

Penetration into non-homogeneous concrete- steel target is of prime importance to applied scients and civilian analyzers. Due to complexly of the problem, most of the work done in this experimental in nature. In this Study, an analytical solution of long rod projectile penetrating depth into concrete targets with applying the analytical model of Alekseeveskiis-Tate, and for concrete/steel targe...

تحلیل نفوذ پرتابه های صلب در اهداف بتنی بر مبنای تئوری انتشار موج شوک (علمی- ترویجی)

Due to the importance of concrete structures, the field of projectile penetration into concrete targets has attracted increasing research efforts. Gao et al. presented a new method for penetration analysis into concrete targets. Propagation of shock waves due to impact is the base of this method. The aim of the present study is to investigate and modify this model. In this research, first a bri...

تحلیل نفوذ مایل پرتابه های مخروطی شاخکدار در اهداف فلزی نازک (علمی-پژوهشی)

بررسی تأثیر چرخش محوری پرتابه اجایو کالیبر کوچک بر پارامترهای نفوذ در اهداف بتنی به‌روش المان‌محدود

In the field of the penetration of kinetic energy projectiles into concrete slabs, scientists have focused on using gas guns. As most of the projectiles have a rotation because they fired from grooved barrels, the penetration theory of them into concrete targets has not to be mentioned. Knowing the residual velocity of the rotating projectiles is important in designing of the civil and military...

تحلیل تجربی و عددی نفوذ سرجنگی پیشرو پرتابه های دو مرحله ای در اهداف بتنی محدود

In this paper, the penetration process of the follow warhead in anti structure tandem projectiles is investigated by numerical and experimental methods. These projectiles are usually shaped charge or EFP. In the follow projectile, geometry and material are considered as the two main parameters. Numerical modeling of the problem has been performed in AUTODYN code. The numerical results have ...

بررسی عددی و تجربی اثر زوایای الیاف در نفوذ پرتابه های با دماغه نیم کروی در اهداف کامپوزیتی (علمی-پژوهشی)

The aim of this study is to investigate the influence of fiber stacking sequence on the penetration and perforation of glass/epoxy composite hat shapes under high velocity impact loading by projectile with semi-spherical nose shape with three different initial velocities using numerical and experimental methods. Four layered unidirectional (UD) E-glass fiber/polyester resin was used to construc...