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首页> 外文期刊>Composites >The effects of matrix cracks on the nonlinear bending and thermal postbuckling of shear deformable laminated beams containing carbon nanotube reinforced composite layers and piezoelectric fiber reinforced composite layers
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The effects of matrix cracks on the nonlinear bending and thermal postbuckling of shear deformable laminated beams containing carbon nanotube reinforced composite layers and piezoelectric fiber reinforced composite layers

机译：基体裂纹对含碳纳米管增强复合材料层和压电纤维增强复合材料层的可剪切变形层合梁的非线性弯曲和热后屈曲的影响

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摘要

This paper investigates the effect of matrix cracks on the nonlinear bending and thermal postbuckling of a piezoelectric shear deformable laminated beam which contains both carbon nanotube reinforced composite (CNTRC) layers and piezoelectric fiber reinforced composite (PFRC) layers. Two matrix-cracked models, namely self-consistent model (SCM) and elasticity theory model (ETM), are selected to describe the degraded stiffness of carbon fiber reinforced composite (CFRC) layers. The beam rests on a two parameter elastic foundation in thermal environments. Based on a higher order shear deformation theory and von Karman nonlinear strain-displacement relationships, the governing equations are established and solved by means of a two-step perturbation approach. The beam-foundation interaction and thermal effects are also included. The material properties of all layers used are assumed to be temperature-dependent. The effects of the density of matrix crack, CNT volume fraction, temperature variation, the foundation stiffness as well as applied voltage on the nonlinear bending and thermal postbuckling behavior of hybrid laminated beams with multiple matrix cracks are discussed in detail. (C) 2016 Elsevier Ltd. All rights reserved.
机译：本文研究了基体裂纹对包含碳纳米管增强复合材料（CNTRC）层和压电纤维增强复合材料（PFRC）层的压电剪切可变形叠层梁的非线性弯曲和热后屈曲的影响。选择了两个矩阵裂化模型，即自洽模型（SCM）和弹性理论模型（ETM），以描述碳纤维增强复合材料（CFRC）层的退化刚度。在热环境中，梁位于两个参数的弹性基础上。基于高阶剪切变形理论和von Karman非线性应变-位移关系，通过两步摄动法建立并求解了控制方程。还包括梁基础相互作用和热效应。假定所使用的所有层的材料特性均取决于温度。详细讨论了基体裂纹密度，碳纳米管体积分数，温度变化，基础刚度以及施加电压对具有多个基体裂纹的混合层合梁的非线性弯曲和热后屈曲行为的影响。 （C）2016 Elsevier Ltd.保留所有权利。

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