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首页> 外文会议>International Conference on Recent Advances in Space Technologies >Toroidal Sandwich Panels with Auxetic Core Under Impact Loads: Numerical Simulations
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Toroidal Sandwich Panels with Auxetic Core Under Impact Loads: Numerical Simulations

机译：冲击载荷下带有辅助芯的环形夹芯板：数值模拟

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In this work we examine the impact behavior of single and doubly curved structures with auxetic cores by using numerical methods. We have evaluated twelve different doubly and one single curved panels impacted by a spherical projectile at a velocity of 100 m/s. The results are firstly discussed by considering the effects of the curvature on the backplane displacement and the energy absorption of the panels. A selected toroidal configuration is then modeled as sandwich structure with an auxetic (re-entrant)core and a spherical projectile is shot on different locations from center to edge. The sandwich structure is made by carbon fiber/epoxy laminates, while the reentrant core is represented with ABSplus plastic. It is found that the damaged area of the auxetic core differs from a traditional honeycomb under impact loading, and this is mainly due to its negative Poisson's ratio.
机译：在这项工作中，我们使用数值方法研究了具有膨胀核心的单双弯结构的冲击行为。我们已经评估了十二个不同的双壁板和一个单弯曲板，它们以100 m / s的速度受到球形弹丸的冲击。首先通过考虑曲率对背板位移和面板能量吸收的影响来讨论结果。然后将选定的环形构型建模为具有膨胀（凹形）芯的夹心结构，并在从中心到边缘的不同位置射击球形弹丸。夹层结构由碳纤维/环氧树脂层压板制成，而凹入型芯则由ABSplus塑料制成。结果发现，在冲击载荷作用下，膨胀芯的受损区域与传统蜂窝不同，这主要是由于其负泊松比所致。

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