带有生物启发三相复合材料面层的四边形辅助夹芯夹层板的扑翼行为数值分析与实验验证

IF 2.5 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Vinay Kumar Prajapati, Jeyaraj Pitchaimani
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引用次数: 0

摘要

本文介绍了带有三相生物启发层压复合材料面层的辅助磁芯四边形夹层板的扑翼特性。板芯由铝制成,板面由分散在生物启发玻璃纤维/环氧层压板中的石墨烯纳米片制成。利用 Reissner-Mindlin 板理论和 Hamilton 方法获得了运动方程,然后借助微分正交法进行了求解。对各向同性和六边形蜂窝芯夹层板的自由振动进行了实验验证。研究探讨了夹芯参数(长宽比、倾斜角和厚宽比)、石墨烯纳米片和纤维的质量分数、各种石墨烯纳米片分布模式、板的几何形状和长宽比以及层压面的生物启发分层方案对扑翼特性的影响。临界气动压力对核心参数和石墨烯纳米片的分散模式并不敏感。随着纤维和石墨烯纳米片质量分数的增加,面板的临界气动压力显著增加。此外,板角的增加也会降低临界空气动力压力。与传统的单向层压、交叉层压和准各向同性层压相比,采用旋转角度较小的螺旋型生物启发层压方案制成的面层板可提高临界空气动力压力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Flutter behavior of quadrilateral auxetic core sandwich plate with bio-inspired three-phase composite facings numerical analysis and experimental verification
Flutter characteristics of auxetic core quadrilateral sandwich plates with three-phase bio-inspired laminated composite facings are presented. The core is made of aluminum, while the facings are made of graphene nanoplatelets dispersed in bio-inspired glass fiber/epoxy laminates. The equations of motion are obtained using Reissner-Mindlin plate theory and Hamilton’s approach and then solved with the help of differential quadrature method. Experimental verification of free vibration is done for isotropic and hexagonal honeycomb core sandwich panels. Influences of core parameters (aspect ratio, inclined angle, and thickness-to-width ratio), mass fraction of graphene nanoplatelets and fibers, various graphene nanoplatelet distribution patterns, the geometry and aspect ratio of the plate, and bio-inspired layup scheme of laminated facings on the flutter characteristic are explored. The critical aerodynamic pressure is not sensitive to the core parameters and the dispersion pattern of graphene nanoplatelets. Critical aerodynamic pressure of the panel increases significantly with increase in the mass fractions of fiber and graphene nanoplatelet. Furthermore, the increase in the plate angles results in reduced critical aerodynamic pressure. Facing laminate made of helicoidal type bio-inspired lay-up scheme with lower rotation angle enhances the critical aerodynamic pressure compared to the conventional uni-directional, cross-ply, and quasi-isotropic lay-ups.
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来源期刊
CiteScore
4.70
自引率
8.30%
发文量
166
审稿时长
3 months
期刊介绍: The Journal of Materials: Design and Applications covers the usage and design of materials for application in an engineering context. The materials covered include metals, ceramics, and composites, as well as engineering polymers. "The Journal of Materials Design and Applications is dedicated to publishing papers of the highest quality, in a timely fashion, covering a variety of important areas in materials technology. The Journal''s publishers have a wealth of publishing expertise and ensure that authors are given exemplary service. Every attention is given to publishing the papers as quickly as possible. The Journal has an excellent international reputation, with a corresponding international Editorial Board from a large number of different materials areas and disciplines advising the Editor." Professor Bill Banks - University of Strathclyde, UK This journal is a member of the Committee on Publication Ethics (COPE).
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