Low-velocity impact response of geometrically nonlinear functionally graded graphene platelet-reinforced nanocomposite plates
Low-velocity impact response of geometrically nonlinear functionally graded graphene platelet-reinforced nanocomposite plates
复制标题
几何非线性功能梯度石墨烯片增强纳米复合材料板的低速冲击响应
DOI：
10.1007/s11071-018-4695-y
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发表时间：
2018-12
影响因子：
5.6
通讯作者：
Yang Jie
中科院分区：
文献类型：
--
作者：
Song Mitao;Li Xiaoqian;Kitipornchai Sritawat;Bi Qinsheng;Yang Jie
本文研究了低含量石墨烯纳米片(GPL)增强功能梯度多层纳米复合板的低速冲击响应。在GPL中，GPL随机取向并均匀分散在聚合物基质中的每一层中，GPL的质量分数沿板厚呈层状变化。采用基于细观力学的Halpin-Tsai模型计算玻璃纤维增强复合材料(GPLRC)的有效材料性能，采用修正的非线性Hertz接触理论定义球形冲击器与GPLRC靶板之间的接触力。在一阶剪切变形板理论和von Kármán非线性运动学的框架下，推导了板的运动方程，并采用两步摄动法进行求解。通过与开放文献的直接比较，验证了本分析的正确性。在此基础上，研究了GPL分布方式、质量分数、几何尺寸、温度变化以及冲击器半径和初始速度对功能梯度GPLRC板低速冲击响应的影响。
This paper investigates the low-velocity impact response of functionally graded multilayer nanocomposite plates reinforced with a low content of graphene nanoplatelets (GPLs) in which GPLs are randomly oriented and uniformly dispersed in the polymer matrix within each individual layer with GPL weight fraction following a layer-wise variation along the plate thickness. The micromechanics-based Halpin–Tsai model is used to evaluate the effective material properties of the GPL-reinforced composite (GPLRC), and the modified nonlinear Hertz contact theory is utilized to define the contact force between the spherical impactor and the GPLRC target plate. The equations of motion of the plate are derived within the framework of the first-order shear deformation plate theory and von Kármán-type nonlinear kinematics and are solved by a two-step perturbation technique. The present analysis is validated through a direct comparison with those in the open literature. A parametric study is then performed to study the effects of GPL distribution pattern, weight fraction, geometry and size, temperature variation as well as the radius and initial velocity of the impactor on the low-velocity impact response of functionally graded GPLRC plates.
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