The Measurement of Forces Resisting Armor Penetration

Masket, A. V.

doi:10.1063/1.1698324

Cited by 21 publications

(9 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, penetration duration dependence on projectile length is suggested to be described by Eq. (19). The prediction from this relation is in good agreement with the experimental data under different projectile length.…”

Section: Discussionsupporting

confidence: 78%

“…Therefore, Eq. (19) approximately gives the scaling rule of penetration duration under the present experimental conditions.…”

Section: Penetration Time Historymentioning

confidence: 99%

“…Therefore, it is difficult to determine which relation is more reasonable than the others. In order to study penetration dynamics, a number of researchers ( [19], [22], [15], [28], [8], and [32]) have attempted to measure penetration depth, velocity, and deceleration time history during penetration. The measurement methods employed include: High-speed photography to measure penetration depth-time history ([19], [22] and [32]); Laser Doppler anemometry to determine projectile velocity-time history ( [31]); On-board accelerometers to record deceleration time history ( [15], [28], and [8]); and Reversed experiments to measure strain, stress and particle velocity in projectile materials ( [5]).…”

Section: List Of Figuresmentioning

confidence: 99%

See 2 more Smart Citations

Shock-Induced Damage in Rock and Concrete

Liu¹,

Ahrens²

1999

View full text Add to dashboard Cite

REPORT DOCUMENTATION PAGE &ik>fcTh. r*M\r r»nnrtino burden tor this collection of informetion is estlmeted to «verso» 1 hour par response. Indui J«h.ÄÄÄ «»",, """. ,", , 2302/CX5f. WORK UNIT NUMBER PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)California Institute DISTRIBUTION/AVAILABILITY STATEMENTApproved for public release J distribution unlimited. PERFORMING ORGANIZATION REPORT NUMBER SPONSOR/MONITOR'S ACRONYMIS) SPONSOR/MONITOR'S REPORT NUMBER(S) SUPPLEMENTARY NOTES14 ABSTRACT We have developed a technique for measuring the depth time history of rigid body penetration into brittle • materials under a deceleration of -10 5 g. A series of 4140 steel projectile penetrations into G-mixture mortar targets has been conducted in the velocity range of 100 to 500 m/s. Based on the experimental results, the target materials are damaged via compacting and brittle radial and lateral crack propagation in front of and surrounding the penetration path. The projectiletarget contact length on the projectile lateral surface is <20% of final penetration depth. This suggests that the effect of lateral friction on the penetration process can be ignored. Final penetration depth is found to be linearly scaled with initial projectile energy per unit cross-section area. Based on the fact that the penetration duration increases slowly with impact velocity, does not approximately depend on projectile. Deduced penetration velocity-time histories suggest that the whole penetration is divided into three stages: an initial stage, a steady penetration stage and a penetration stop stage. The average deceleration m the steady penetration stage for projectiles with the same dimensions is found to be linearly proportional to initial impact velocity. The average resistance pressure during penetration is estimated to be comparable to shock wave pressure. The present data demonstrate that a very strong similarity of penetration depth-time history is described by a relation between normalized penetration depth and normalized penetration time. This similarity can be used to predict penetration depth-time history under different initial projectile conditions.

show abstract

Section: Discussionsupporting

confidence: 78%

“…Therefore, Eq. (19) approximately gives the scaling rule of penetration duration under the present experimental conditions.…”

Section: Penetration Time Historymentioning

confidence: 99%

Section: List Of Figuresmentioning

confidence: 99%

See 1 more Smart Citation

Shock-Induced Damage in Rock and Concrete

Liu¹,

Ahrens²

1999

View full text Add to dashboard Cite

show abstract

“…5,17,.23,26,27), with the frictional forces developed during armor penetration (Ref. 29,30), and with elastic wave effects produced in remote regions (Ref. 31).…”

Section: Previous Studiesmentioning

confidence: 99%

“…5,30) and expectation, the shape of the force-time curves should peak during the first half of the contact duration, requiring the construction outlined above.…”

Section: Data Reduction Processmentioning

confidence: 99%

High-Velocity Impact of Steel Spheres of Metallic Targets

Goldsmith¹,

Finnegan²,

Rinehart³

1971

View full text Add to dashboard Cite

ABSTRACT.A study was made of the penetration, perforation, and fragmentation of 0.05 to 0.25-inch-thick 2024 aluminum, SAE 1020, and 4130 steel alloy plates impacted normally by 0.125-, 0.25-, and 0.375-inch-diameter AISI 52-100 hard steel spheres at velocities from 2,800 to 8,800 fps. The drop in projectile velocity was found to decrease just above the ballistic limit, then steadily rise with increasing initial bullet speed in all target-projectile configurations.The first trend was predicted by a relation based on a simple momentum balance, whereas a more precise analysis provided reasonable correspondence with the data over the entire veloL.ity range. Strain gage results showed a decrease of dishing relative to radial target motion with increasing impa.t velocity. Displacement-time curves were constructed using measured initial and terminal projectile velocities, fragment dimensions, and Kerr cell records.Force histories of the projectiles were then computed from these data using an empirical relation developed previously. Peak forces obtained were in reasonable agreement with calculations from a triangular impulse of the proper duration and of magnitude equal to the measured change in momentum. * NAVAL WEAPONS CENTER Aa4, I IltaNaval Air Systems Command Department of the Navy Washington, D. C. 20360A study was made of the penetration, perforation, and fragmentation of 0.05 to 0.25-inch-thick 2024 aluminum, SAE 1020, and 4130 steel alloy plates impacted normally by 0.125-, 0.25-, and 0.375-inch-diameter AISI 52-100 hard steel spheres at velocities from 2,800 to 8,800 fps.The drop in projectile velocity was found to decrease just above the ballistic limit, then steadily rise with increasing initial bullet speed in all target-projectile configurations.The first trend was predicted by a relation based on a simple momentum balance, whereas a more precise analysis provided reasonable correspondence with the data over the entire velocity range.Strain gage results showed a decrease of dishing relative to radial target motion with increasing impact velocity.Displacement-time curves were constructed using measured initial and terminal projectile velocities, fragment dimensions, and K,,rr cell records.Force histories of the projectiles were then computed from these data using an empirical relation developed previously. Peak forces obvained were in reasonable agreement with calculations from a triangular impulse of the proper duration and of magnitude equal to the measured change in momentum.

show abstract

Penetration force measurement of thin plates by laser doppler anemometry

Sheen

Chen

et al. 1994

Experimental Mechanics

View full text Add to dashboard Cite

The Measurement of Forces Resisting Armor Penetration

Cited by 21 publications

References 0 publications

Shock-Induced Damage in Rock and Concrete

Shock-Induced Damage in Rock and Concrete

High-Velocity Impact of Steel Spheres of Metallic Targets

Penetration force measurement of thin plates by laser doppler anemometry

Contact Info

Product

Resources

About