Hypervelocity Impact Response of Ti-6Al-4 V and Commercially Pure Titanium

Iyer, Kaushik A.; Poormon, Kevin L.; Deacon, Ryan M.; Mehoke, Douglas S.; Swaminathan, P. K.; Brown, Robert C.

doi:10.1016/j.proeng.2013.05.016

Cited by 15 publications

(6 citation statements)

References 16 publications

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“…This level of resolution was determined to be more than adequate following consideration of the need for adequate resolution of the rear wall and bumper in the through-thickness directions [4,16] and accuracy in reproducing images of particulate debris clouds obtained at 6.64 km∕s using flash radiography [12], as well as prior experience in developing grids suitable for obtaining excellent predictions of incipient spall in relatively thick titanium alloy shielding plates [21]. As presented in the validation analyses that follow, adequacy of mesh resolutions used were ultimately determined by the capability to predict rear wall failure modes observed in experiments.…”

Section: Extension Of Whipple Shield Damage Computations Up To 150mentioning

confidence: 99%

“…An analytical EOS was used for Kapton, and tabular equations of state were used for the remaining materials [22,23]. Johnson-Cook strength and failure models, along with spall strength values, were used for the aluminum alloy bumper, rear wall, and particle [21,22]. No strength model was used for fused silica and Kapton because these are considered to be of negligible importance at the impact speeds and shock pressures of interest (i.e., the response of the bumpers and small dust particles at the extreme impact speeds of interest will be determined primarily by the shock-induced phase changes governed by their respective equations of state, and the opportunity for the development of low hydrostatic pressure or strength-relevant states is limited owing to relatively small through-thicknesses or diameters).…”

Section: Extension Of Whipple Shield Damage Computations Up To 150mentioning

confidence: 99%

“…Tabular equations of state were used for cadmium and aluminum [22]. Johnson-Cook strength and failure models, along with spall strength values were used for the aluminum alloy rear wall [21,22]. The Whipple shield configuration consisted of a 0.127-cm-thick cadmium bumper, 10.2 cm standoff, and 0.318-cm-thick aluminum alloy 2219-T87 rear wall, and cadmium particles.…”

Section: Extension Of Whipple Shield Damage Computations Up To 150mentioning

confidence: 99%

“…Adaptive mesh refinement with square cells as small as 7.5 × 7.5 μm was used for these calculations. Johnson-Cook strength and failure models, along with spall strength values were used for the titanium alloy rear wall [21,22]. The data differ from existing BLEs obtained by representing the MLI blanket as an aluminum alloy or Kapton monolithic bumper, which are also shown for comparison.…”

Section: Dust Hvi Shielding Capability Of MLImentioning

confidence: 99%

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Interplanetary Dust Particle Shielding Capability of Spacecraft Multilayer Insulation

Iyer

Mehoke

Batra

2015

Journal of Spacecraft and Rockets

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Definition of interplanetary dust particle hypervelocity impact protection levels provided by spacecraft multilayer insulation/thermal blankets is provided for the first time. Development of a new data-anchored shock-hydrocodecomputations-derived ballistic limit equation in the 7-150 km∕s hypervelocity impact range for representative twowall Whipple shields, in which spacecraft multilayer insulation is the bumper material impacted by fused silica dust, is presented. A baseline configuration was adopted for analysis: 0.0176-cm-thick Kapton bumper (monolithic and layered), 2.54 cm standoff, and 0.0762-cm-thick titanium alloy Ti-6Al-4V rear wall. Significant efforts made to verify and validate the computational methodology with hypervelocity impact test data are also described. With a solid Kapton bumper, the critical particle diameter for causing incipient spall in the rear wall, which is chosen to be the failure criterion, is found to be in the ∼650-1100 μm range, with the largest and the smallest sizes corresponding to 30 and 150 km∕s hypervelocity impact, respectively. When the bumper is layered in a manner similar to that found in actual blankets (140 μm spacing), the critical particle diameter is indicated to be in the ∼450-600 μm range.

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Section: Extension Of Whipple Shield Damage Computations Up To 150mentioning

confidence: 99%

Section: Extension Of Whipple Shield Damage Computations Up To 150mentioning

confidence: 99%

Section: Extension Of Whipple Shield Damage Computations Up To 150mentioning

confidence: 99%

Section: Dust Hvi Shielding Capability Of MLImentioning

confidence: 99%

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Interplanetary Dust Particle Shielding Capability of Spacecraft Multilayer Insulation

Iyer

Mehoke

Batra

2015

Journal of Spacecraft and Rockets

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“…[15] qualitatively described the crushing process of a hypervelocity projectile hitting a thin plate and considered that the crushing of target material is caused by the net tensile stress at a certain position of the material exceeding the dynamic breaking strength of the material caused by the sparse wave. Iyer et al [16] studied the impact of a 2017-T4 aluminum ball with a diameter of 2.35 mm on the Ti-6Al-4V shield at a speed of 7 km/s. e results showed that the damage modes at the bottom of the crater included microcracks, shear bands, large grain deformation, and recrystallization.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Response of the Steel Plate Under the Impact of High-Speed Coal Projectile

Zhu

et al. 2022

Shock and Vibration

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The coal-rock projectiles induced by gas explosions in coal mines have a strong destructive effect on mine facilities and equipment, which are mostly made of steel. The LS-DYNA is used to simulate the process of coal projectile striking the steel plate. The results show that during the failure process, the morphological change of the projectile consists of three stages including plastic deformation, partial crushing, and complete crushing, and the steel plate pits at the impact point. The duration of the stress peak value of the steel plate increases as the impact velocity increases. The farther away from the center point, the smaller the stress peak value is, and the shorter the duration is. When the impact velocity is 100 m/s and 300 m/s, the axial velocity curve at the impact point of the projectile is pulsating. When the impact velocity reaches 500 m/s, the axial velocity of the projectile rapidly increases and then tends to be stable. As the impact velocity increases, the energy absorbed by the steel plate increases, and the rate of increase also increases. However, the proportion between the absorbed energy of the steel plate and the initial kinetic energy of the projectile decreases. The projectile conversion energy of the 1 mm steel plate is slightly larger than that of 1.5 mm and 2 mm steel plates, and the energy absorbed by the steel plate decreases with the increase in thickness of the steel plate. When the thickness of the steel plate is more than 2 mm, the thickness of the steel plate has little effect. The results of the study have a direct sense for the antiknock design of coal mine facilities and equipment.

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Research and development on hypervelocity impact protection using Whipple shield: An overview

Wen

Chen

2021

Defence Technology

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Hypervelocity Impact Response of Ti-6Al-4 V and Commercially Pure Titanium

Cited by 15 publications

References 16 publications

Interplanetary Dust Particle Shielding Capability of Spacecraft Multilayer Insulation

Interplanetary Dust Particle Shielding Capability of Spacecraft Multilayer Insulation

Dynamic Response of the Steel Plate Under the Impact of High-Speed Coal Projectile

Research and development on hypervelocity impact protection using Whipple shield: An overview

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