Damage mechanism of carbon fiber reinforced plastic pipe based on reverse and forward curvature drilling. (15th July 2022)

• Record Type: Journal Article
• Authors: Li, Shujian; Zou, Shi; Dai, Longyu; Zhou, Yongchao; Qiu, Xinyi; Li, Changping; Li, Pengnan; Ko, Tae Jo
• Is Part Of: Composite structures. Volume 292(2022)
• Publication Date: 2022-07-15
• Subjects: CFRP pipe -- Drilling -- Reverse and forward curvature drilling -- Damage analysis -- Axial force; Composite construction -- Periodicals; Composites -- Périodiques; 624.18
• DOI: 10.1016/j.compstruct.2022.115700
• Languages: English
• ISSNs: 0263-8223

Abstract

Highlights: The reverse and forward curvature drilling is adopted for drilling small-diameter CFRP pipes. The damage behavior of CFRP pipe is studied. The contact mode between cutting edge of drill and arc surfaces of CFRP pipe is different. The machining quality of CFRP pipe is better at the low speed and feed rate. Abstract: Metal-composite shaft parts composed of metal joints and composite pipes have attracted extensive attention in the fields of unmanned aerial vehicles (UAVs) and new energy vehicles because of their advantages of light weight, high strength, and stable axial load transmission. Hole making is a necessary process to ensure connections between metal joints and composite pipes. For the drilling of a small-diameter composite pipe, the one-time drilling method which includes reverse and forward curvature drilling is usually used to ensure the stability of axial load transmission of the metal-composite shaft. An in-depth understanding of the damage mechanism of hole making in a composite pipe can help to guide hole making technology for composite pipes. In this study, the material damage mechanism of reverse and forward curvature drilling of the carbon fiber reinforced plastic (CFRP) pipe was analyzed by theoretical analysis and finite element modeling and simulation. Verification experiments were designed to capture the cutting force and damage morphology of the entrance and exit of holes. The effect of machining parameters on material damage was revealed, and reasonable suggestions were given for the selection of machining parameters in reverse and forward curvature drilling.