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首页> 外文期刊>Journal of aerospace engineering >Simulating the Response of a Composite Honeycomb Energy Absorber. Ⅰ: Dynamic Crushing of Components and Multiterrain Impacts
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Simulating the Response of a Composite Honeycomb Energy Absorber. Ⅰ: Dynamic Crushing of Components and Multiterrain Impacts

机译：模拟复合蜂窝能量吸收器的响应。 Ⅰ：部件的动态破碎和多地形影响

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摘要

This paper describes the experimental and analytical evaluation of an externally deployable composite honeycomb structure that is designed to attenuate impact energy during helicopter crashes. The concept, designated the deployable energy absorber (DEA), uses an expandable Kevlar honeycomb to dissipate kinetic energy through crushing. The DEA incorporates a unique flexible-hinge design that enables the honeycomb to be packaged and stowed efficiently until needed for deployment. Experimental evaluation of the DEA included dynamic crush tests of multicell components and vertical drop tests of a composite fuselage section retrofitted with DEA blocks onto multiterrain. Finiteelement models of the test articles were developed and simulations were performed using the transient dynamic code LS-DYNA. In each simulation, the DEA was represented using shell elements assigned two different material properties: Mat 24, an isotropic piecewise linear plasticity model, and Mat 58, a continuum damage mechanics model used to represent laminated composite fabrics. DEA model development and test analysis comparisons are presented.
机译：本文介绍了一种可外部展开的复合蜂窝结构的实验和分析评估，该结构旨在减少直升机坠毁时的冲击能量。该概念称为可展开式能量吸收器（DEA），它使用可膨胀的凯夫拉蜂窝材料通过粉碎来散发动能。 DEA结合了独特的柔性铰链设计，使蜂窝能够高效包装和存放，直到需要部署为止。 DEA的实验评估包括对多单元组件的动态压溃测试，以及将DEA块改装到多地形上的复合机身截面的垂直跌落测试。开发了测试项目的有限元模型，并使用瞬态动态代码LS-DYNA进行了仿真。在每个模拟中，DEA均使用具有两种不同材料属性的壳体元素表示：垫24，各向同性的分段线性可塑性模型和垫58（用于表示层压复合织物的连续损伤力学模型）。介绍了DEA模型开发和测试分析比较。

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