But relatively speaking,the sensitivity of strength of projectile to mass abrasion is higher,which indicates that the effect of projectile material on mass abrasion is more dramatic than the

The penetration behavior of a high-velocity projectile depends on the strength of MMC because it is an important factor for penetration depth [2].On the other hand,length-to-diameter ratio (D/d) and ductility of penetrators,target thickness,pene- trator nose shape and also hydrodynamic nature of penetration process effects penetration 1.IntroductionNose mass is approximately 10% of the entire projectile,and a slight change in mass likely causes a significant variation in nose shape; therefore,nose abrasion must be considered.We introduced ,which is the ratio of nose mass loss to projectile mass loss expressed as 0,1.

The projectiles recovered from the targets had small mass Iosses due to abrasion,but the overall nose shapes prior to and after penetration looked very similar.We previously in which the ogive-nose rod projectile is described by mass m,shank radius a,and caliber-radius-head ~.The target is described by density p and the target strength A Mass Loss Penetration Model to Investigate the Dynamic Nose mass is approximately 10% of the entire projectile,and a slight change in mass likely causes a significant variation in nose shape; therefore,nose abrasion must be considered.We introduced ,which is the ratio of nose mass loss to projectile mass loss expressed as .2.2.Derivation of Basic Equations 2.2.1.Projectile Mass Abrasion Equation

An engineering model on mass abrasion of kinetic energy penetrator is presented to predict the nose shape and mass loss of the residual projectile after high-speed penetration into concrete.An Investigation on the Grooved-Tapered Projectile Based on the dynamic spherical cavity expansion (SCE) theory of the concrete materials and the analysis of the experimental data,both the model of the petaling penetration with low speed and the model of the round hole penetration with high speed are constructed to describe the penetration of the grooved-tapered projectile in this paper.The penetration depth and the mass abrasion are

Based on the dynamic spherical cavity expansion (SCE) theory of the concrete materials and the analysis of the experimental data,both the model of the petaling penetration with low speed and the model of the round hole penetration with high speed are constructed to describe the penetration of the grooved-tapered projectile in this paper.The penetration depth and the mass abrasion are An Investigation on the Nose Mass Abrasion of Projectile Based on the dynamic spherical cavity expansion theory of concrete and the analysis of experimental data,a mass abrasion model of projectile considering the hardness of aggregates,the relative strength of target and projectile and the initial impact velocity is constructed in this paper.The initial impact velocity is the most important factor of mass abrasion.

But relatively speaking,the sensitivity of strength of projectile to mass abrasion is higher,which indicates that the effect of projectile material on mass abrasion is more dramatic than the hardness ofCited by 5Publish Year 2012Author Haijun Wu,Fei Qian,Fenglei Huang,Yinan WangProjectile Nose Mass Abrasion of High-SpeedThe mass abrasion of projectile would occur in high-speed penetration.With the increasing of impact velocity (pene-tration velocity >800m/s),the mass abrasion of projectile is more and more obvious,so the rigid-body penetration model would be inapplicable.The nose sharp of projectile and the penetration property of projectile would be changed

In this study,two different scale projectile high velocity penetration experiments with concrete targets that had an average compressive strength of 35 MPa were conducted in order to find the velocity limits and nose erosion properties.We conducted the penetration experiments for the small-scale (48 mm diameter,195 mm long,2 kg) and the EFFECT OF PROJECTILE NOSE SHAPE ON BALLISTICCorran et al.[5] investigated the effect of projectile mass,nose shape and hardness on the penetration of steel and aluminum alloy plates.Blunt and conical projectiles of 12.5 mm diameter were impacted on plates 1.3 to 5.9 mm thick and considering a velocity ranging from 50 to 250 m/s.The mass of the projectile varied from 15 to 100 g.

More recently,Silling and Forrestal [13] proposed a new abrasion model in which the rate of mass loss is proportional to local sliding velocity.Thus,the projectile tip has minimum velocity and the model maximum abrasion toward the projectile shank rather than the nose tip.Effects of abrasion on the penetration of ogival-nosed More recently,Silling and Forrestal [13] proposed a new abrasion model in which the rate of mass loss is proportional to local sliding velocity.Thus,the projectile tip has minimum velocity and the model maximum abrasion toward the projectile shank rather than the nose tip.

The erosion of the nose surface in both steel and WHA cases of high velocity,non-ballistic warheads is the result of mechanical abrasion,hot shearing,and/or melting of the nose material.In order to eliminate this,the surface and near surface material of the nose must be composed of materials that have certain mechanical and thermal properties.Failure behavior of projectile abrasion during high-speed Sep 01,2020·The mass abrasion of projectile is an obvious failure phenomenon because of mass loss and nose blunting during the high-speed projectile deep penetration into concrete target.The thermal melting and cutting by aggregate on projectile outer surface are the main mechanisms of mass abrasion according to the experimental observation.

images12345NextStability analyses of the mass abrasive projectile high Dec 12,2014·The mass loss and nose blunting of a projectile during high-speed deep penetration into concrete target may cause structural destruction and ballistic trajectory instability of the penetrator,obviously reducing the penetration efficiency of penetrator.Provided that the work of friction between projectile and target is totally transformed into the heat to melt penetrator material at its nose Mass Loss and Nose Shape Change on Ogive-nose Steel Aug 08,2012·Abstract The mass loss of the nose of projectile is an obvious phenomenon in high-speed penetration into concrete target.The mass loss percentage depends linearly on the impact velocities of projectile according to experimental data fitting results.A semi-empirical model,which can calculate the ogive-nose shape change due to mass loss,is developed in this paper.The modified

Aug 08,2012·Abstract The mass loss of the nose of projectile is an obvious phenomenon in high-speed penetration into concrete target.The mass loss percentage depends linearly on the impact velocities of projectile according to experimental data fitting results.A semi-empirical model,which can calculate the ogive-nose shape change due to mass loss,is developed in this paper.The modifiedMaterials Free Full-Text Theoretical Investigation on Experimental and theoretical investigations on the failure behaviors of projectile during high-speed impact into concrete slabs were performed in this study.The ogive-nose projectiles after impact experiments were recovered and their microstructures were observed by scanning electron microscope and metallographic microscope.Mass abrasion and nose blunting are the typical failure models of

Experimental and theoretical investigations on the failure behaviors of projectile during high-speed impact into concrete slabs were performed in this study.The ogive-nose projectiles after impact experiments were recovered and their microstructures were observed by scanning electron microscope and metallographic microscope.Mass abrasion and nose blunting are the typical failure models of Modeling and Simulation of Ballistic Penetration of Numerical simulations and analysis of ballistic impact and penetration by tungsten alloy rods into composite targets consisting of layers of aluminum nitride ceramic tile(s),polymer laminae,and aluminum backing are conducted over a range of impact velocities on the order of 1.0 to 1.2 km/s.Computational results for ballistic efficiency are compared with experimental data from the literature.

Jan 01,2010·Obviously,the total mass abrasion of projectile is consistent with the mass loss of ogive-nose,i.e.,(6) M n = M It is further confirmed that,the mass loss on projectile shank due to high-speed friction is much less than the mass erosion on the ogive-nose due to flow erosion under extreme high temperature and pressure.The mass Previous123456NextStability analyses of the mass abrasive projectile high The initial oblique and attacking angles as well as the asymmetrical nose abrasion may lead to bending or even fracture of a projectile,and the penetration efficiency decreases distinctly.The structural stability of a high-speed projectile non-normally penetrating into concrete and the parametric influences involved are analyzed with the mass abrasion taken into account.

Projectile Nose Mass Abrasion of High-Speed Penetration into Concrete .By Haijun Wu,Fei Qian,Fenglei Huang and Yinan Wang.Cite .BibTex; Full citation Abstract.Based on the dynamic spherical cavity expansion theory of concrete and the analysis of experimental data,a mass abrasion model of projectile considering the hardness of aggregates Projectile Nose Mass Abrasion of High-Speed Penetration Projectile Nose Mass Abrasion of High-Speed Penetration into Concrete .By Haijun Wu,Fei Qian,Fenglei Huang and Yinan Wang.Cite .BibTex; Full citation; Abstract.Based on the dynamic spherical cavity expansion theory of concrete and the analysis of experimental data,a mass abrasion model of projectile considering the hardness of aggregates

During the high-speed penetration of projectiles into concrete targets (the impact velocity ranges from 1.0 to 1.5 km/s),important factors such as the incident oblique and attacking angles,as well as the asymmetric abrasions of the projectile nose induced by the target-projectile interactions,may lead to obvious deviation of the terminal ballistic trajectory and reduction of the penetration Stability analyses of the mass abrasive projectile high The initial oblique and attacking angles as well as the asymmetrical nose abrasion may lead to bending or even fracture of a projectile,and the penetration efficiency decreases distinctly.The structural stability of a high-speed projectile non-normally penetrating into concrete and the parametric influences involved are analyzed with the mass abrasion taken into account.

2.1 Projectile.The projectile ( Fig.1) consisted of solid projectile body and obturator ring with a total mass of 0.976 kg.The mass of the obturator ring was 0.0072 kg.The projectile diameter was 0.0299 m,the ratio of the projectile length to diameter was 7,the caliber-radius-head was 4,material was 35CrMnSiA,and Rockwell hardness was 44.The mass abrasion of projectile is an obvious failure phenomenon because of mass loss and nose bluntingduring the high-speed projectile deep penetration into concrete target.The thermal melting and cutting by aggregate on projectile outer surface are the main mechanisms of mass abrasion according to the experimental observation.Author:Jianguo Ning,Zhao Li,Tianbao Ma,Xiangzhao XuPublish Year:2020Failure behavior of projectile abrasion during high-speed Was this helpful?Projectile Nose Mass Abrasion of High-Speed Penetration Jan 26,2015·The mass abrasion of projectile would occur in high-speed penetration.With the increasing of impact velocity (penetration velocity > 800 m/s),the mass abrasion of projectile is more and more obvious,so the rigid-body penetration model would be inapplicable.

Mass abrasion and nose blunting are the typical failure models of steel projectile.Furthermore,thermal melting and cutting are the two main failure mechanisms.Based on the microscopic experimental results,a theoretical model of ogive-nose projectile subjected to impact loading considering the melting and cutting mechanisms was proposed.WOUND BALLISTICS - Motion and Effects of Projectiles in Shored exit wounds may mimic the marginal abrasion of entrance wounds; Wounds Caused by High-Velocity Rifle Bullets.High velocity rifle bullets produce tail splash which is the rearward propulsion of injured tissue and a large temporary cavity 11 to 12.5 times the diameter of the projectile.

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