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首页> 外文期刊>Composite Structures >Examination of thermal postbuckling of temperature dependent FG-GRMMC laminated beams with negative Poisson's ratio on elastic foundations
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Examination of thermal postbuckling of temperature dependent FG-GRMMC laminated beams with negative Poisson's ratio on elastic foundations

机译：温度依赖性FG-GRMMC层压梁与负泊松比率的热出版物的检查

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摘要

This paper examines the in-plane negative Poisson's ratio (NPR) effect on the thermal postbuckling of graphene-reinforced metal matrix composite (GRMMC) laminated beams subjected to a uniform temperature rise and supported by an elastic foundation. GRMMC layers having different graphene volume fractions can facilitate the formation of functionally graded (FG) patterns of the beams. The temperature-dependent material properties of GRMMC layers can be estimated by a nonlinear function of temperature from the results of the molecular dynamics simulations. The governing equations for the beam thermal postbuckling problem can be derived based on a higher order shear deformation beam theory and solved by applying the two-step perturbation approach. The von Karman geometric nonlinearity, the elastic foundation support and the thermal effect are considered in the modeling. Numerical investigations are carried out for (10/-10/10/-10/10)S and (10/-10/10)S GRMMC beams with in-plane NPR. The results show that the buckling temperature of (10/10/10)S UD beam is slightly higher than that of (10/-10/10/-10/10)S UD beam. The thermal postbuckling capacity for the (10/-10/10)S FG-X beam becomes much higher than that of the (10/-10/10/-10/10)S FG-X beam, when the beam deflection is sufficiently large.
机译：本文研究了石墨烯增强金属基质复合材料（GRMC）层压光束对经受均匀温度升高并由弹性地基支撑的均多的泊松比率（NPR）效应。具有不同石墨烯体积级分的GRMMC层可以促进梁的功能梯度（FG）图案的形成。 Grmc层的温度依赖性材料特性可以通过来自分子动力学模拟结果的温度的非线性函数来估计。基于更高阶剪切变形光束理论，可以通过应用两步扰动方法解决的梁热后射出问题的控制方程。在建模中考虑了von Karman几何非线性，弹性基础支持和热效果。对（10 / -10 / 10 / -10 / 10）S和（10 / -10 / 10）S GRMMC梁进行数值研究，其中包含内部NPR。结果表明，（10/10/10）S UD光束的屈曲温度略高于（10 / -10 / 10 / -10 / 10）的UD光束。 （10 / -10 / 10）FG-X梁的热后置出容量远高于（10 / -10 / 10 / -10 / 10）S FG-X光束的容量，当光束偏转时足够大。

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  • 来源
    《Composite Structures》 |2021年第9期|114066.1-114066.10|共10页
  • 作者

    Shen Hui-Shen; Xiang Y.;

  • 作者单位

    Shanghai Jiao Tong Univ Sch Aeronaut & Astronaut Shanghai 200240 Peoples R China|Shanghai Jiao Tong Univ Sch Ocean & Civil Engn Shanghai 200240 Peoples R China;

    Western Sydney Univ Sch Engn Design & Built Environm Locked Bag 1797 Penrith NSW 2751 Australia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Auxetic composites; Functionally graded; Temperature-dependent; Thermal buckling; Beam;

    机译：辅助复合材料;功能渐变;温度依赖性;热屈曲;梁;

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