Stability, Paths, and Dynamic bending of a Blunt Body of Revolution Penetrating into an Elastoplastic Medium

Simonov, I. V.; Osipenko, K. Yu.

doi:10.1023/b:jamt.0000025026.52832.ea

Cited by 8 publications

(6 citation statements)

References 2 publications

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“…However, for certain positive yaw angles, the projectile is eventually pointing in the opposite direction (x=-) (Fig.10). This change in trajectory direction has been observed in penetration of blunt projectiles into geological media [ (Simonov and Osipenko(2004)]. Figure 12 shows the dependency of V cr on  1,  2 and L c /L.…”

Section: Surface Element I=0supporting

confidence: 54%

“…The former belongs to a stability problem, and the latter belongs to projectile reverse in a curvilinear motion. Simonov and Osipenko(2004) reported an analytical study on the trajectory instability of hard blunt projectiles in low density rock medium for normal impact. They found that projectile instabilities can occur for large yaw angles.…”

Section: Surface Element I=0mentioning

confidence: 99%

“…There are limited investigations on these issues [Bernard and Creighton(1979), Simonov and Osipenko(2004)], and many key questions remain inconclusive. A general 3-D model for rigid projectile dynamics will be presented and validated in this paper, which will then be used to analyse the trajectory and stability of the projectile.…”

Section: Introductionmentioning

confidence: 99%

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Hard projectile penetration and trajectory stability

Li¹,

Flores‐Johnson²

2011

International Journal of Impact Engineering

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Abstract:We present a general framework to describe the dynamics of a hard projectile penetrating into a solid target. Rigid-body dynamics, differential area force law and semi-empirical resistance function are used to formulate the motion of the hard projectile. The proposed model is capable of predicting the projectile trajectory under various oblique and yaw angles. Critical conditions for the occurrences of the instability and the reverse of the projectile trajectory are discussed. It was found that the relative location of mass centre of the projectile has strong influence on the control of the rotation of the projectile, and thus, the projectile stability and the change of trajectory direction. The validity of the proposed model is limited to deep penetration and when the wake separation and reattachment between projectile body and target have negligible influence on the target resistance to the projectile.

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Section: Surface Element I=0supporting

confidence: 54%

Section: Surface Element I=0mentioning

confidence: 99%

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Hard projectile penetration and trajectory stability

Li¹,

Flores‐Johnson²

2011

International Journal of Impact Engineering

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“…The trajectory instability and convergence of the curvilinear motion of projectile is driven by increase in impact velocity, projectile geometry, uniformity of grain size distribution within the soil mass, increase in grain size and porosity, and other striking parameters [66]. Analytical model for rigid projectile dynamics is proposed by Simonov and Osipenko [67] to analyze the trajectory and stability of the projectile during deep penetration in an elasto-plastic medium. A "differential area force law (DAFL)"-based analytical method, proposed by the AVCO Corporation [16] in which the projectile surface resistance is written as a quadratic function of velocity, is most effective in studying the projectile's curvilinear motion and stability during non-deformable projectile deep penetration into hard soil media [65].…”

Section: Projectile Non-normal Impact and Stabilitymentioning

confidence: 99%

Advances in Projectile Penetration Mechanism in Soil Media

et al. 2020

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The penetration to geological shield occurs in many situations at various velocities and scales, for example, meteor-cratering, pile driving, falling of objects from high-rise building construction, and debris/fragments from failed components. The soil media is an efficient energy dissipation system and effective shock protection shield. Impact circumstances are currently getting widespread attention. A lot of research has been done on soil media for impact and penetration. The phenomenon of dynamic penetration in heterogeneous particulate soil medium is very complex and the target soil media under dynamic impact especially under high speed and deep penetration neither behave completely as solid nor as liquid. The topics of recent research interest in the field of penetration to soil media and their significant findings are critically reviewed in the present study. The dedicated review of analytical, empirical, experimental, and computational methods to predict the response of soils media-impacting objects to penetration is presented. The emerging challenges in fundamental research of penetration into soil media are outlined and it is an attempt to formulate the future research directions in the field of soil media penetration.

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“…A general framework of non-linear differential equations describing the projectile penetration has been established in previous studies (e.g. [17][18][19][20][21]) based on DAFL approach and semi-empirical resistance function. It has been found that the projectile trajectory may change abruptly around a critical impact velocity, which was considered as a trajectory instability problem [17].…”

Section: Waterways Experiments Station (Wes) To Develop 2-d (Penco2d) mentioning

confidence: 99%

Trajectory instability and convergence of the curvilinear motion of a hard projectile in deep penetration

Gao

2017

International Journal of Mechanical Sciences

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Stability, Paths, and Dynamic bending of a Blunt Body of Revolution Penetrating into an Elastoplastic Medium

Cited by 8 publications

References 2 publications

Hard projectile penetration and trajectory stability

Hard projectile penetration and trajectory stability

Advances in Projectile Penetration Mechanism in Soil Media

Trajectory instability and convergence of the curvilinear motion of a hard projectile in deep penetration

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