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首页> 外文期刊>Journal of applied statistics >Response Surface Characterization of the Mechanical Behavior of Impact-damaged Sandwich Composites
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Response Surface Characterization of the Mechanical Behavior of Impact-damaged Sandwich Composites

机译：冲击损伤三明治复合材料力学行为的响应面表征

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摘要

In this research, Response Surface Methodology (RSM) is employed to characterize the influence of material configuration on the damage tolerance and residual strength characteristics of sandwich composites. Test specimens used were comprised of carbon-epoxy woven fabric facesheets, and Nomex honeycomb cores. The ranges of the material configuration used are typical of those employed in aircraft applications. A series of carefully selected tests were used to isolate the coupled influence of various combinations of the number of facesheet plies, core density, and core thickness on the damage formation and residual strength degradation due to normal impact. Response surface estimates suggest that impact damage development and residual strength degradation are highly material and lay-up configuration dependent. Increasing the core thickness for a specific number of facesheet plies resulted in decreasing the impact damage, whereas increasing the number of facesheet plies for a given core thickness resulted in enhancing the residual strength. The derived damage tolerance and residual strength models can lead to a better understanding of the mechanical behavior of the impact-damaged sandwich composites, and hence improve their design and expand their applications.
机译：在这项研究中，采用响应表面方法（RSM）来表征材料结构对夹心复合材料的损伤耐受性和残余强度特性的影响。所使用的测试样品由碳环氧机织面料面板和Nomex蜂窝芯组成。所使用的材料配置范围是飞机应用中所采用的典型范围。使用一系列精心选择的测试来隔离面板层数，芯密度和芯厚度的各种组合对由于正常冲击而导致的损伤形成和残余强度降低的耦合影响。响应面估计表明，冲击损伤的发展和残余强度的降低在很大程度上取决于材料和铺层结构。对于特定数量的面板层，增加芯厚度可减少冲击损伤，而对于给定的芯厚度，增加面板层的数量可提高残余强度。推导的损伤容限和残余强度模型可以使人们更好地了解冲击破坏的三明治复合材料的机械性能，从而改善其设计并扩展其应用范围。

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