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<p>CFRP (carbon fiber–reinforced polymer) exhibits anisotropy and low interlaminar shear strength, which makes it prone to inducing defects, especially at the fiber cutting angle of 135°, where subsurface damage is especially severe. This article constructs a 3D microscopic finite element model for CFRP cutting, analyzes the cutting mechanism of micro-textured tools at a 135° fiber cutting angle, and proposes used micro-textured tools with varying depths for cutting. Concurrently, incorporating the “crescent-shaped depression” morphology of bamboo rats” incisors, the subsurface damage under different fiber cutting angles during the cutting process of CFRP can be improved. The biomimetic gradient micro-textured tools proposed in this study can effectively reduce the overall subsurface damage during CFRP processing at various angles. Compared to non-textured and equal-depth micro-textured tools, the overall maximum subsurface damage is reduced by 44.92% and 21.99%, respectively, providing an effective solution to reduce subsurface damage.</p>

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Research on subsurface damage of CFRP cutting with biomimetic gradient micro-textured tools

  • 期刊论文

  • 发表日期：

    2025年8月20日

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  • Mengxue Gao,
  • Xu Zhang,
  • Liangfei Hu,
  • Yue Song,
  • Peiwei Yao,
  • Liqiang Zhang,
  • Xuechang Zhang

摘要

CFRP (carbon fiber–reinforced polymer) exhibits anisotropy and low interlaminar shear strength, which makes it prone to inducing defects, especially at the fiber cutting angle of 135°, where subsurface damage is especially severe. This article constructs a 3D microscopic finite element model for CFRP cutting, analyzes the cutting mechanism of micro-textured tools at a 135° fiber cutting angle, and proposes used micro-textured tools with varying depths for cutting. Concurrently, incorporating the “crescent-shaped depression” morphology of bamboo rats” incisors, the subsurface damage under different fiber cutting angles during the cutting process of CFRP can be improved. The biomimetic gradient micro-textured tools proposed in this study can effectively reduce the overall subsurface damage during CFRP processing at various angles. Compared to non-textured and equal-depth micro-textured tools, the overall maximum subsurface damage is reduced by 44.92% and 21.99%, respectively, providing an effective solution to reduce subsurface damage.