Interplanetary Dust Particle Shielding Capability of Spacecraft Multilayer Insulation
| Autor: | Kaushik A. Iyer, Romesh C. Batra, Douglas S. Mehoke |
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| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Journal of Spacecraft and Rockets. 52:584-594 |
| ISSN: | 1533-6794 0022-4650 |
| Popis: | 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-hydrocode-computations-derived ballistic limit equation in the 7–150 km/s hypervelocity impact range for representative two-wall 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 size... |
| Databáze: | OpenAIRE |
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