تحلیل نفوذ پرتابه های صلب در اهداف بتنی بر مبنای تئوری انتشار موج شوک (علمی- ترویجی)
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Abstract:
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 brief explanation of extracting Gao’s method formulas is provided. Then, the validity of the model results is investigated. Considering the errors and contradictions observed in this method, a modified model is introduced. This modification is done by developing a relation for distance between shock front and surface of projectile. By exploiting this modified model, the penetration depths and the instantaneous deceleration curves are calculated. In addition numerical simulations are performed by using the finite element code AUTODYN. Good agreement between numerical, experimental and analytical results can be observed.
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تحلیل تجربی سرعت حد بالستیک اهداف بتنی هوادار سبک اتوکلاو شده تحت نفوذ پرتابه صلب
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full textتحلیل تجربی سرعت حد بالستیک اهداف بتنی هوادار سبک اتوکلاو شده تحت نفوذ پرتابه صلب
در این مقاله سرعت حد بالستیک بتن هوادار سبک اتوکلاو شده تحت نفوذ پرتابه های صلب مختلف به صورت تجربی بدست آمده است. برای این کار ابتدا بلوکهای صنعتی موجود در ابعاد 200*250*600 میلیمتر، به نمونههای 50*125*125میلیمتر برش داده شدند. پس از آن با استفاده از دستگاه تست شلیک، نمونه ها تحت شلیک سه نوع پرتابه با دماغهها و سرعتهای متفاوت قرار داده شدند. این سه نوع پرتابه شامل پرتابههای با دماغه سرتخت...
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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...
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Journal title
volume 9 issue 1
pages 51- 62
publication date 2013-09
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