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CFRP钻削制孔分层的形态研究
苏飞1, 陈娟2, 邱新义1, 邓朝晖1, 郑雷3
1.湖南科技大学智能制造研究院, 湘潭 411201;2.昆明医科大学海源学院, 昆明 650106;3.盐城工学院机械工程学院, 盐城 224051
摘要:
针对单向碳纤维增强复合材料(UD-CFRP)钻削制孔分层的各向异性行为,以UD-CFRP板的孔出口表层分层缺陷为研究对象,研究制孔分层的形状和大小。结果表明:UD-CFRP板的分层形状呈近椭圆形;随着主轴转速的增大,分层尺寸呈减小趋势,以主刚度方向最为明显,但减小幅度最大仅为0.14 mm;随着进给速度的增大,在主刚度方向极易产生整束纤维的撕裂,尺寸呈增大趋势,以主刚度方向最为明显,增大幅度达0.81 mm,以及由于主刚度方向整束纤维的撕裂,分层形状在主刚度方向出现突变。
关键词:  碳纤维复合材料(CFRP)  钻削  分层形状  评价方法
DOI:10.12044/j.issn.1007-2330.2018.05.016
分类号:TQ327;V258+.3
基金项目:国家自然科学基金(51575470);博士启动基金(E56122);难加工材料高效精密加工重点实验室开放基金(E21753)
Shape-Size of CFRP Delamination During Drilling
SU Fei1, CHEN Juan2, QIU Xinyi1, DENG Zhaohui1, ZHENG Lei3
1.Intelligent Manufacturing Institute, Hunan University of Science and Technology, Xiangtan 411201;2.Haiyuan College, Kunming Medical University, Kunming 650106;3.School of Mechanical Engineering, Yancheng Institute of Technology, Yancheng 224051
Abstract:
In order to reveal the anisotropic behavior of the unidirectional carbon fiber reinforced plastics (UD-CFRP) delamination during the drilling, the shape and size of the delamination on the top layer of the hole exit are investigated. The results indicated that the shape of the UD-CFRP delamination was suborbicular rather than smooth elliptical. The size of the delamination decreased with increasing the spindle speed, and the most obvious was in the direction of principal stiffness, but the max decrement was only 0.14 mm. Large area of the fiber bundle tears would easy to occur in the direction of principal stiffness with increasing the feed speed. And the size increased with increasing of the feed speed, the most obvious was also in the direction of principal stiffness, the max decrement was 0.81 mm. The shape of the delamination appeared suddenly change in the direction of principal stiffness due to the large area of the fiber bundle tears.
Key words:  Carbon fiber-reinforced plastics (CFRP)  Drilling  Shape of delamination  Evaluation method