Transactions of Nanjing University of Aeronautics & Astronautics
Milling Performance of Cf/SiC Composites: Three-Dimensional Finite Element Analysis and Experimental Validation
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Abstract:
Carbon fiber reinforced silicon carbide （Cf/SiC） composite materials possess high strength， wear resistance， and anisotropy， thus their machining is very difficult and demands extra precautions. In this research， finite element analysis （FEA） simulations and experiments of the slot milling process have been carried out to analyze the cutting performance of Cf/SiC with a polycrystalline diamond （PCD） tool. Effects of machining parameters on cutting forces are studied and material removal mechanisms at different fiber cutting angles have been investigated. The finite element model has been generated in ABAQUS/CAE software and the machining is performed. by using user-defined material subroutine. Effects of machining parameters on cutting forces are calculated through FEA simulations and compared with experimental results to authenticate the finite element model. Cutting forces in x-axis and y-axis directions obtained from experiments and simulations have been analyzed and a good agreement is found between them. The resultant cutting forces decrease with the increase in cutting speed. However， with the increase of feed per tooth the resultant cutting forces increase. When the machining is performed along the fiber direction， stresses generated near the tool edge are minimum. The stresses rise with the increase of the fiber cutting angle. This research provides an efficient way to analyze the cutting performance of Cf/SiC composite materials.
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This work was supported by the National Natural Science Foundation of China （No. 52075255）.
Clc Number:
TG51
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