Effects of spinning on residual velocity of ogive-nosed projectile undergoing ordnance velocity impact

Pranay, V.; Panigrahi, S. K.

doi:10.1177/09544062211020030

Cited by 8 publications

(15 citation statements)

References 22 publications

(22 reference statements)

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“…Observing the simulation results published earlier (Pranay and Panigrahi, 2022) for the ogive nose projectiles for steel 4340 and tungsten alloy, the spinning of the projectile provides additional energy to the projectile due to the rotational energy of the projectile. So, at the beginning of penetration in the target, the projectile consists of translational and rotational energies, which generally means more energy is available for penetration.…”

Section: Discussionmentioning

confidence: 67%

“…the basic ogive nose numerical model with only translational energy, is well validated with penetration theory (Carlucci and Jacobson, 2008). A detailed explanation is given in reference (Pranay and Panigrahi, 2022).…”

Section: Discussionmentioning

confidence: 99%

“…Hexahedral and tetrahedral elements are used to discretize the target plates and projectile, respectively. A convergence study of residual velocity has been carried out and explained in the earlier work of the same authors to establish the required mesh in terms of element size (Pranay and Panigrahi, 2022).…”

Section: Numerical Simulations Of Ogive Nose and New Spiral Head Proj...mentioning

confidence: 99%

“…A numerical study based on explicit dynamics has been performed with no spinning (0x) and with spinning velocity of 1x, 2x, 4x to each impact velocity for ogive nose projectile (Pranay and Panigrahi, 2022). The residual velocities are evaluated for different projectile materials New Spiral head projectiles when impacted with and without a spin on the target plate with different thicknesses, which are presented in Tables 4 and 5.…”

Section: Ogive Nose Projectile Penetration With Spinningmentioning

confidence: 99%

“…After Mesh sensitivity analysis (Pranay and Panigrahi, 2022), the target has meshed with hexahedral elements using the multi-zone method. An inner square region of 30 mm on each side is given with an element size of 1 mm, and the remaining outer zone is given with a maximum element size of 6 mm.…”

Section: Numerical Simulations Of Ogive Nose and New Spiral Head Proj...mentioning

confidence: 99%

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Design and development of new spiral head projectiles undergoing ballistics impact

Pranay

Panigrahi

2022

IJSI

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PurposeThe purpose of this study is to design and develop new spiral head projectiles undergoing ballistics impact.Design/methodology/approachThe introduction of the rifled barrel in firearms made projectile spin during its flight path. The central translational velocity (impact velocity) is one parameter to defeat/penetrate the target in the penetration process. Another important parameter considered to be the shape of the projectile. Many types of projectile shapes have been designed to defeat the target. In the recent years, ogival nose shape is one of the well-known projectile shapes in use abundantly. The present research is made to design the nose shape so as to use the spin during the penetration of target effectively. In this study, a new spiral head projectile shape is proposed and designed, which uses the rotation of projectile (spin) for penetrating the Al7075-T6 target. When the ogive and new spiral head projectile is impacted on Al 7075-T6 target of 12.5 mm, 18 mm thicknesses at ordnance velocities, the residual velocity is evaluated numerically using ANSYS/Explicit Dynamics at normal impact condition. Two projectile materials, steel 4340 and tungsten alloy, are used as projectile materials. Along with the translational velocity, rotation velocities (spin rate) 13,000, 26,000 and 52,000 rad/s also provided to projectile. The residual velocities verses spin rate are plotted for different spiral angle projectiles for impact velocities 1,000–1,500 m/s, at normal impact conditions on the Al 7075-T6 target. Compared with the ogive nose projectile, the proposed new spiral head projectile made of tungsten alloy is significantly effective.FindingsSpiral head projectile having tungsten alloy material gives encouraging results at 12.5 mm target thickness. The new spiral head projectile is damaged partially. At 18 mm target thickness impact conditions, it is observed that the projectile head is completely damaged. The effectiveness of spiral head projectile on a target plate thickness of 18 mm is considered to study the impact condition.Research limitations/implicationsAll the above results need to be experimentally verified. However, the basic numerical model used in the present study, i.e. the basic ogive nose numerical model with only translational energy, is well validated with penetration theory available in literatures.Practical implicationsThe designed new spiral head projectile is only effective with tungsten alloy material within considered design parameters. For steel 4340 material, the spiral head projectile is less effective than the ogive nose projectile. In tungsten alloy projectiles, by observing all considered spiral angles, 30-degree spiral angle projectile gives the best performance at most of the considered impact velocity conditions.Originality/valueThe proposed research outputs are original, innovative and, have lot of importance in defence applications particularly in arms and ammunitions.

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Section: Discussionmentioning

confidence: 67%

Section: Discussionmentioning

confidence: 99%

Section: Numerical Simulations Of Ogive Nose and New Spiral Head Proj...mentioning

confidence: 99%

Section: Ogive Nose Projectile Penetration With Spinningmentioning

confidence: 99%

Section: Numerical Simulations Of Ogive Nose and New Spiral Head Proj...mentioning

confidence: 99%

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Design and development of new spiral head projectiles undergoing ballistics impact

Pranay

Panigrahi

2022

IJSI

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Numerical Study on the Effect of Spinning for 7.62 APM2 Projectile Impacting on Al 7075-T651 Target

Pranay,

Panigrahi

2024

MATEC Web Conf.

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When a projectile launches from a rifled barrel, it undergoes rotation around its longitudinal axis, commonly referred to as spinning, to maintain stability during its flight through the air. Upon reaching the target, the projectile possesses both rotational and translational energies. This study examines the impact of rotational energy on the penetration of 7.62 APM2 projectiles by using Finite Element Analysis(FEA). Al 7075-T651 alloy with a thickness of 20mm is considered as target material. Initially, the model is validated using the experimental results available in the literature. The validated model has been extended to study the effect of the projectile’s spinning by using the Recht-Ipson parameters. Based on the results, it is observed that the rotation of the projectile leads to an enhancement in penetrating energy and a reduction in ballistic limit velocity.

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Effect of spinning for different nose shape projectiles undergoing normal impact on Al 7075-T651 target

Vaggu,

Panigrahi

2024

IJSI

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PurposeThe effect of spinning has been studied and analysed for different projectile shapes such as ogive, blunt, cylindrical and conical by using numerical simulations.Design/methodology/approachProjectile shape is one of the important parameters in the penetration mechanism. The present study deals with the failure mechanisms and ballistic evaluation for different nose-shaped projectiles undergoing normal impact with spinning. Materials characterization has been made by Johnson–Cook strength and failure models, and LS-DYNA simulations are used to analyse the impact of steel projectiles on an Al 7075-T651 target at different impact velocities under normal impact conditions. The experimental results from the literature are used to validate the model. Based on the residual velocity values, the Recht-Ipson model has been curve-fitted and approximate ballistic limit velocity has been evaluated. The approximated ballistic limit velocity is found to be 3.4% higher than the experimental results and compared well with the experimental results. Subsequently, the validated model conditions are used to study and analyse the effect of spinning for different nose-shaped projectiles undergoing normal impact conditions.FindingsThe ductile hole failure is observed for the ogive nose projectile, petals are formed and fragmented for the conical projectile, and plugging is observed for cylindrical projectiles. A Recht-Ipson curve is presented for each spinning condition for each projectile shape and the ballistic limit has been evaluated for each condition.Originality/valueThe proposed research outputs are original and innovative and, have a lot of importance in defence applications, particularly in arms and ammunition.

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Effects of spinning on residual velocity of ogive-nosed projectile undergoing ordnance velocity impact

Cited by 8 publications

References 22 publications

Design and development of new spiral head projectiles undergoing ballistics impact

Design and development of new spiral head projectiles undergoing ballistics impact

Numerical Study on the Effect of Spinning for 7.62 APM2 Projectile Impacting on Al 7075-T651 Target

Effect of spinning for different nose shape projectiles undergoing normal impact on Al 7075-T651 target

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