Optical techniques for the investigation of the ballistic impact of thin plates

Prentice, H. J.; Proud, W. G.; Walley, S. M.; Field, J. E.

doi:10.1016/j.ijimpeng.2011.06.007

Cited by 12 publications

(12 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, 3D DIC has also been used to characterise the response of low velocity impacts on thin plates [19]. The purpose of the research conducted by Prentice et al [19] was to assist in the design of explosive reactive armour (ERA). ERA consists of an explosive material sandwiched between two metal plates.…”

Section: Dic Used In Impact Studies To Measure Target Deformationmentioning

confidence: 99%

“…Prentice et al attempted to use two thin layers of electrically insulated brass on the point of impact as a trigger, but found that it had a significant effect on the plate response, highlighting the importance of non-invasive camera triggering mechanisms. The authors did report that while larger sub-image sizes gave smoother results, due to better signal-to-noise ratio and larger overlap between adjacent sub-images, it did reduce the spatial resolution, leading to under-or over-predicted displacements where the strain is non-uniform across the sub-image [19].…”

Section: Dic Used In Impact Studies To Measure Target Deformationmentioning

confidence: 99%

See 1 more Smart Citation

Visual Methods to Assess Strain Fields in Armour Materials Subjected to Dynamic Deformation—A Review

Ellis

Hazell

2020

Applied Sciences

View full text Add to dashboard Cite

When impacted by a projectile, ballistic protection undergoes very large strain rates over very short periods of time. During these impact events, materials will undergo a very short region of elastic deformation, before undergoing significant plastic deformation. Due to the high levels of plastic deformation the samples undergo, strain gauges and other embedded sensors are often ineffective or become damaged before useful data can be obtained. Three-dimensional digital image correlation (3D DIC) is a non-invasive measurement method that uses two high-speed cameras, offset from each other by 15–45° to observe a speckle pattern on the sample material. As the material, and by extension the speckle pattern, deforms, the images taken throughout the deformation can be compared in sequence, to determine the motion and deformation of the sample. Recent advances in camera technology have allowed for frame rates in the hundreds of thousands of frames per-second, allowing for the measurement of very high-strain rate impact events. This paper will describe the premise of 3D DIC and provide a review of the current applications and research into high-speed impact testing using 3D DIC.

show abstract

Section: Dic Used In Impact Studies To Measure Target Deformationmentioning

confidence: 99%

Section: Dic Used In Impact Studies To Measure Target Deformationmentioning

confidence: 99%

Visual Methods to Assess Strain Fields in Armour Materials Subjected to Dynamic Deformation—A Review

Ellis

Hazell

2020

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…In the same way, research about pendulum impact testing was applied to evaluate a specific section of a barrier [17]; tests allowed them to understand the performance of the barrier and when it attained considerable damage. Additionally, research using optical techniques was used to understand the behavior during the impact test of chrome steel spheres over steel and copper plates [18]; they applied stereo digital speckle photography.…”

Section: Introductionmentioning

confidence: 99%

Optical Characterization of a Pendular Impact

et al. 2020

View full text Add to dashboard Cite

We present a simple but accurate correlation between an experimental characterization and a simple analytical prediction of a wave propagation induced by the impact of a pendulum in a box filled with fine sand; this research is based on optical measurements and was carried out using the digital image correlation technique to determine the motion on the surface of the box visually observed by the reflection of the laser. We suggest that the reaction to the impact in the body will be similar to an equivalent damped mass-spring system, obtaining an average error of 3.67208 × 10 −4 .

show abstract

“…Direct detonation of the warhead is the best . However, most of these anti‐missile warheads are designed and studied for thin‐shell charge, so the damage effect caused by these fragments is very limited, and generally only 10–20 mm steel plate can be penetrated . Another type of Multi‐EFPs (MEFPs)warhead, which produces several small EFPs of penetration power of only 20–30 mm after an explosion .…”

Section: Introductionmentioning

confidence: 99%

Study on Interaction Mechanism between the Shaped Charge Jet and Thick Moving Target

Jia

Huang

et al. 2019

Propellants Explo Pyrotec

View full text Add to dashboard Cite

The traditional anti‐aircraft and anti‐missile warhead mainly hit the target by fragments or MEFPs. However, these killing elements are only effective for thin‐shell ammunition (10–30 mm), but not for thick‐shell ammunition (>100 mm). This paper proposes an attacking method towards thick moving target by shaped charge jet. Through the analysis of the whole penetrating process between the shaped charge jet and the thick moving target, the paper divides the process into two stages: undisturbed jet penetration and disturbed jet penetration. Based on virtual origin theory, this paper carried out detailed theoretical analysis for each stage and established theory algorithms of changes of cavity when shaped charge jet penetrates the thick moving target, penetration depth of undistributed jet, the lateral velocity of jet and penetration depth contributed by distributed jet. Since the current experimental method cannot accurately analyze the dynamic penetration process of each jet element, in order to verify the theoretical model, a diameter of 66 mm shaped charge was designed, and through the LS‐DYNA software, the jet penetrates steel target with the transverse velocity of 0∼600 m/s was calculated. The study also carried out detailed analysis of the jet tip and tail velocity, the shape of the penetration hole, the lateral velocity of the disturbed jet and the total depth of penetration. At the same time, we combine with the experimental data of E. Marmor et al.[22], to compare with the theoretical results. The calculations are in good agreement with the E. Marmor's experimental datas. The results indicate that shaped charge warhead is an effective method to tackle high speed thick moving target. The theoretical model established in this paper can effectively guide the structural design of the warhead.

show abstract

Optical techniques for the investigation of the ballistic impact of thin plates

Cited by 12 publications

References 48 publications

Visual Methods to Assess Strain Fields in Armour Materials Subjected to Dynamic Deformation—A Review

Visual Methods to Assess Strain Fields in Armour Materials Subjected to Dynamic Deformation—A Review

Optical Characterization of a Pendular Impact

Study on Interaction Mechanism between the Shaped Charge Jet and Thick Moving Target

Contact Info

Product

Resources

About