Unveiling the cutting force of multiphase fibers and particle reinforced polymer matrix composites based on multiphase microstructure: An experimental and theoretical study

To prevent excessive damage caused by high cutting forces during the processing of multiphase fibers and particle reinforced polymer matrix composites (MFPRP), it is essential to accurately predict their cutting force. This paper introduces a novel cutting force model for multiphase fibers and particle reinforced polymer matrix composites based on multiphase microstructural characteristics. A series of models are established based on the unique distribution patterns of fiber bundles, particles, and matrix: including models for the matrix and glass particle cutting forces. Simultaneously, cutting force models for microscopic representative volume element (MRVE) are established based on fibers oriented in different directions. The overall cutting force model is derived by incorporating the longitudinal arrangement of materials and tool conditions. Finally, comparing predicted cutting forces with experimental data yields an average error of 6.17%, effectively predicting the magnitude of cutting forces in MFPRP and laying a foundation for cutting force regulation.