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<p>This study presents a double-layer corrugated-core sandwich composite as a multifunctional structure that simultaneously delivers broadband radar absorption and hypervelocity impact (HVI) shielding for spacecraft. An optimized corrugated-core design achieved a measured 90% absorption across a broadband frequency range while maintaining an overall panel thickness of 27.6&#xa0;mm. Smoothed particle hydrodynamics (SPH) simulations of a 4&#xa0;mm Al-2017-T4 projectile at 3&#xa0;km/s revealed progressive projectile dissipation of more than 80% of the incident kinetic energy; residual debris velocities fell below 0.5&#xa0;km/s for both normal and 45° oblique impacts. The demonstrated integration of multiscale dielectric loss and controlled structural collapse offers a lightweight, scalable approach to stealth spacecraft shielding structures capable of withstanding the combined threats of broadband radar detection and HVI in low-Earth-orbit environments.</p>

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Hypervelocity Impact Shielding Sandwich RAS with Miura-Ori Core Composed of NCF/PEEK Thermoplastic Composites

  • 期刊论文

  • 发表日期：

    2025年9月9日

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  • Jae-Won Shim,
  • Geon-Gyu Lee,
  • Young-Woo Nam

摘要

This study presents a double-layer corrugated-core sandwich composite as a multifunctional structure that simultaneously delivers broadband radar absorption and hypervelocity impact (HVI) shielding for spacecraft. An optimized corrugated-core design achieved a measured 90% absorption across a broadband frequency range while maintaining an overall panel thickness of 27.6 mm. Smoothed particle hydrodynamics (SPH) simulations of a 4 mm Al-2017-T4 projectile at 3 km/s revealed progressive projectile dissipation of more than 80% of the incident kinetic energy; residual debris velocities fell below 0.5 km/s for both normal and 45° oblique impacts. The demonstrated integration of multiscale dielectric loss and controlled structural collapse offers a lightweight, scalable approach to stealth spacecraft shielding structures capable of withstanding the combined threats of broadband radar detection and HVI in low-Earth-orbit environments.