Wang Dongyao, He Xiaodong, Xu Zhonghai, Jiao Weicheng, Yang Fan, Jiang Long, Li Linlin, Liu Wenbo, Wang Rongguo
Center for Composite Materials and Structures, School of Astronautics, Harbin Institute of Technology, Harbin 150080, China.
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, China.
Materials (Basel). 2017 Feb 20;10(2):204. doi: 10.3390/ma10020204.
Owing to high specific strength and designability, unidirectional carbon fiber reinforced polymer (UD-CFRP) has been utilized in numerous fields to replace conventional metal materials. Post machining processes are always required for UD-CFRP to achieve dimensional tolerance and assembly specifications. Due to inhomogeneity and anisotropy, UD-CFRP differs greatly from metal materials in machining and failure mechanism. To improve the efficiency and avoid machining-induced damage, this paper undertook to study the correlations between cutting parameters, fiber orientation angle, cutting forces, and cutting-induced damage for UD-CFRP laminate. Scanning acoustic microscopy (SAM) was employed and one-/two-dimensional damage factors were then created to quantitatively characterize the damage of the laminate workpieces. According to the 3D Hashin's criteria a numerical model was further proposed in terms of the finite element method (FEM). A good agreement between simulation and experimental results was validated for the prediction and structural optimization of the UD-CFRP.
由于具有高比强度和可设计性，单向碳纤维增强聚合物（UD-CFRP）已在众多领域中用于替代传统金属材料。UD-CFRP始终需要进行后加工工艺以达到尺寸公差和装配规格。由于其不均匀性和各向异性，UD-CFRP在加工和失效机理方面与金属材料有很大不同。为了提高效率并避免加工引起的损伤，本文致力于研究UD-CFRP层压板的切削参数、纤维取向角、切削力和切削引起的损伤之间的相关性。采用扫描声学显微镜（SAM），然后创建一维/二维损伤因子以定量表征层压板工件的损伤。根据三维Hashin准则，进一步提出了基于有限元法（FEM）的数值模型。验证了模拟结果与实验结果之间的良好一致性，以用于UD-CFRP的预测和结构优化。
