Fabrication and mechanical properties of CFRP composite three-dimensional double-arrow-head auxetic structures
Fabrication and mechanical properties of CFRP composite three-dimensional double-arrow-head auxetic structures
复制标题
CFRP复合材料三维双箭头拉胀结构的制备及力学性能
DOI：
10.1016/j.compscitech.2018.05.014
复制
发表时间：
2018-08-18
影响因子：
9.1
通讯作者：
Ma, Li
中科院分区：
文献类型：
--
作者：
Wang, Xin-Tao;Wang, Bing;Ma, Li
近年来，具有负泊松比（拉胀）的3D结构引起了人们的极大兴趣。许多聚合物和金属3D拉胀结构已经使用增材制造技术制造，然而复合3D拉胀结构很少报道。弹性结构的刚度通常较低，这限制了其在结构上的应用。拉胀结构的比刚度和强度可以通过由高性能纤维增强聚合物（FRP）复合材料制成而显著提高。因此，应开展FRP复合材料三维拉胀结构的研究。提出了一种碳纤维增强复合材料（CFRP）三维双箭头（DAH）拉胀结构。采用实验、有限元和理论分析相结合的方法，研究了复合材料三维DAH拉胀结构的力学性能。结果表明，复合材料三维DAH拉胀结构的泊松比和有效压缩模量随压缩应变幅值的变化而变化，且随着压缩应变的增加，结构的拉胀性增强，刚度增加.复合材料三维DAH结构的比刚度远高于金属结构。此外，给出了结构泊松比和有效压缩模量与几何参数的关系。用高性能FRP复合材料制造拉胀结构可以显著提高其力学性能，使其具有更广泛的应用。
In recent years, 3D structures with negative Poisson's ratio (auxetic) have attracted great interest. Many polymer and metal 3D auxetic structures have been manufactured using additive manufacturing technology, however composite 3D auxetic structures are rarely reported. Auxetic structures are normally of low stiffness which causes limitations on the structural applications of them. The specific stiffness and strength of auxetic structures can be significantly improved by making them from high-performance fibre reinforced polymer (FRP) composites. Consequently, research of composite 3D auxetic structures made from FRP should be conducted. This paper presents the composite 3D double-arrow-head (DAH) auxetic structure made from carbon fibre reinforced polymer (CFRP) using an assembly method. Experimental, finite element and theoretical methods are adopted to study the mechanical properties of the composite 3D DAH auxetic structures. Results show that the Poisson's ratios and effective compression moduli of the composite 3D DAH auxetic structures vary depending on the compression strain amplitude, and the structures become more auxetic and stiffer with the increase of the compression strain. The specific stiffness of the composite 3D DAH structure is much higher than that of the metal structure. In addition, the dependences of the structures Poisson's ratio and effective compression modulus on the geometry parameters have also been given. Making auxetic structures from high-performance FRP composites can significantly improve their mechanical properties which will enable them to have a much wider variety of applications.