碳纤维增强复合材料超声振动辅助车削有限元仿真

摘要

采用 Hashin-Damage 失效准则建立碳纤维增强复合材料超声振动辅助车削有限元模型，预测超声振动切削过程中切削力变化，将仿真所得切削力平均值与同条件下实验所得切削力平均值比较，验证有限元模型的有效性。将超声振动辅助车削切削力平均值与普通车削切削力平均值比较，采用超声振动辅助加工手段可明显降低切削力，且随超声振动振幅、频率增加切削力降低。研究超声振幅及频率对复合材料基体破坏及损伤影响表明，随超声振幅及频率增加基体破坏、压溃损伤、开裂损伤程度均降低。%The finite element model of ultrasonic vibration assisted turning of carbon fiber reinforced polymer (CFRP)composite was developed based on the Hashin damage failure criterion.The cutting forces were predicted by using the finite element model.The model was validated by comparing the principle cutting force of simulation results with experimental ones.The cutting forces in ultrasonic vibration assisted turning decrease obviously compared with those in conventional turning process.And the cutting forces decrease with the increase of the vibration amplitude and vibration frequency.Furthermore,the degrees of matrix damage,matrix cracking,and matrix crushing decrease with the increase of the vibration amplitude and vibration frequency.