Virtual tests of elastodynamic response of natural fiber-reinforced orthotropic plates
Virtual tests of elastodynamic response of natural fiber-reinforced orthotropic plates
复制标题
天然纤维增强正交各向异性板弹动力响应虚拟试验
DOI：
10.1016/j.compstruct.2018.02.093
复制
发表时间：
2018-05
影响因子：
6.3
通讯作者：
Jin-Yang Zheng
中科院分区：
文献类型：
--
作者：
Li Ma;Chuan-Chuan Shen;An-Da Zhang;Xiao-Gui Wang;Li-Hua Liang;Jin-Yang Zheng
天然纤维增强复合材料（NFRC）是一种新型的环保材料，具有优良的自然降解性能，成本低，来源丰富。针对NFRC材料弹性模量等力学参数的不均匀性，建立了NFRC板弹性模量正态分布模型，并结合有限元法对NFRC板的弹性动力响应进行了分析。采用非均质材料模型的有限元法，每次计算得到的结果都不相同，因此可以将非均质材料有限元法作为一种虚拟试验，通过多次计算得到统计结果。研究发现，当考虑天然纤维弹性模量的不均匀性时，即使对于NFRC薄板，板的面内位移也会急剧增加，且不能合理忽略。在冲击响应过程中，观察到了明显的位移振荡和挠度畸变，挠度曲线的高曲率表明了高的变形梯度，并可能导致潜在的局部损伤。研究还发现，材料的非均匀性是引起板动力节律响应的另一个重要因素。
Natural fiber-reinforced composite (NFRC) is a new type of environmental-friendly material for the excellent performance in natural degradation, low cost and rich sources. The mechanical parameters such as elastic modulus of NFRC material is intrinsically inhomogeneous, and a normal distribution model of Young's modulus of natural fibers combined with finite element method (FEM) was developed to investigate the elastodynamic response of NFRC plates. The FEM with heterogeneity material model allows every computation produces a different result, which thus can be taken as a virtual test for NFRC structures, and the statistical result can be obtained according to multiple computations. It is found that in-plane displacements of plate increase dramatically and cannot be rationally neglected even for a thin NFRC plate when the inhomogeneity of Young's modulus of natural fibers was considered. The displacement oscillation and deflection distortion were clearly observed during the impact response, where the high curvature of deflection contours indicated high deformation gradient and may cause the potential local damage. Also it is found that material inhomogeneity is the other important factor to excite dynamical rhythm response of NFRC plates.
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影响因子：
9.1
作者：
Joseph, PV;Joseph, K;Thomas, S
通讯作者：
Thomas, S
影响因子：
6.4
作者：
Hao-Jie Jiang;Xiaogui Wang;L. Liang;H. Dai
通讯作者：
Hao-Jie Jiang;Xiaogui Wang;L. Liang;H. Dai
影响因子：
9.1
作者：
Bledzki, A. K.;Jaszkiewicz, A.
通讯作者：
Jaszkiewicz, A.
DOI：
10.1007/978-1-4613-8865-4_29
发表时间：
1951
影响因子：
2.6
作者：
R. D. Mindlin
通讯作者：
R. D. Mindlin
影响因子：
11.2
作者：
D. Mulinari;H. Voorwald;M. Cioffi;M. I. P. D. Silva;S. Luz
通讯作者：
D. Mulinari;H. Voorwald;M. Cioffi;M. I. P. D. Silva;S. Luz