刀具织构轮廓对碳纤维增强复合材料面下损伤影响的切削仿真研究

Effect of Different Surface Micro-Textured Tool on Subsurface Damage in Carbon Fiber Reinforced Plastic Cutting Simulation

为减小碳纤维增强复合材料(CFRP)加工时的面下损伤深度,创建了基于二维Hashin准则的宏观连续动态切削CFRP有限元模型,分析了切削力和面下损伤深度与纤维方向角之间的变化趋势,通过引入织构刀具来降低切削力及面下损伤深度,比较了沟槽形织构刀具、圆形织构刀具、三角形织构刀具切削CFRP的切削力和面下损伤。结果表明,不同织构刀具的切削力和面下损伤深度随纤维方向角变化趋势一致,均在0°时最小,90°达到最大值;织构刀具相对传统无织构刀具切削CFRP时均降低了切削力和面下损伤深度,其中圆形织构刀具降低程度最大;仿真模型经实验验证准确有效。

In order to reduce the depth of subsurface damage during processing of carbon fiber reinforced plastic(CFRP),a macro continuous dynamic cutting CFRP finite element model was established based on the Hashin failure criterion.The variation law of cutting force and subsurface damage depth with the fiber direction angle was analyzed.The cutting force and subsurface damage were reduced by introducing a textural tool.The effects of grooved textured tool,circular textured tool and triangular textured tool on CFRP cutting simulation were compared.The results showed that consistent fiber orientation with the change in the cutting force and damage depth at a different surface texture tool trend,with the minimum value at 0°and the maximum value at 90°.Compared with the conventional non-textured tool,both the cutting force and the subsurface damage depth are reduced when the textured tool is cutting CFRP,and the reduction degree of the circular textured tool is the largest.The simulation models are experimentally proven to be accurate and efficient.