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<p>Continuous carbon fibre–reinforced aluminium matrix composites (C<sub>f</sub>/Al) possess superior properties including high strength and low density and are extensively used in fields including aerospace, defence, and industrial facilities. In this paper, simulation and experimental research on single-diamond-grain grinding of unidirectional C<sub>f</sub>/Al composites were carried out. The removal mechanism of carbon fibres under different fibre angles was analysed, and on this basis, the influence of fibre angles and grinding parameters on the machined surface roughness Sa was explored. The analysis shows that under different fibre angles, the main defect forms of fibres include fibre fracture, fibre exposure, and fibre debonding. Moreover, the difference in fibre angle <i>α</i> can also lead to differences in the fibre fracture surface. Further research on surface quality found that the closer the <i>α</i> angle is to 90°, the larger the Sa will be. With the grinding depth <i>a</i><sub><i>p</i></sub> increases, the Sa increases and the surface topography of C<sub>f</sub>/Al composites deteriorates. With the wheel speed <i>v</i><sub><i>s</i></sub> increases, the Sa decreases, and the surface topography of C<sub>f</sub>/Al composites improves.</p>

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Removal mechanism and damage evolution of Cf/Al composites based on single-diamond-grain grinding

  • 期刊论文

  • 发表日期：

    2025年5月24日

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  • Guoqiang Yin,
  • Hao Guo,
  • Dong Wang,
  • Wenguang Wang,
  • Xuyang Zhang,
  • Yunguang Zhou,
  • Ye Chen

摘要

Continuous carbon fibre–reinforced aluminium matrix composites (Cf/Al) possess superior properties including high strength and low density and are extensively used in fields including aerospace, defence, and industrial facilities. In this paper, simulation and experimental research on single-diamond-grain grinding of unidirectional Cf/Al composites were carried out. The removal mechanism of carbon fibres under different fibre angles was analysed, and on this basis, the influence of fibre angles and grinding parameters on the machined surface roughness Sa was explored. The analysis shows that under different fibre angles, the main defect forms of fibres include fibre fracture, fibre exposure, and fibre debonding. Moreover, the difference in fibre angle α can also lead to differences in the fibre fracture surface. Further research on surface quality found that the closer the α angle is to 90°, the larger the Sa will be. With the grinding depth ap increases, the Sa increases and the surface topography of Cf/Al composites deteriorates. With the wheel speed vs increases, the Sa decreases, and the surface topography of Cf/Al composites improves.