为了揭示激光切割碳纤维复合材料(CFRP)时材料对激光能量的吸收和传递机理,分别建立了激光同向切割单丝排列CFRP的三维有限元模型、丝-束直径比例三维模型和纤维-树脂两相三维模型。模拟结果表明,随着丝-束直径比例的减小,切缝宽度从229.45μm降至95.60μm,热影响区(HAZ)宽度从172.08μm降至156.79μm。试验与模拟结果基本一致,切缝宽度和HAZ宽度的误差分别为5.97%和1.13%。 In order to reveal the mechanism of laser energy absorption and transmission in the process of laser cutting carbon fiber composite (CFRP), the three-dimensional finite element model of CFRP with laser co-axial cutting was established. The three-dimensional model of fiber bundle- Phase three-dimensional model. The simulation results show that the width of kerf decreases from 229.45μm to 95.60μm and the heat affected zone (HAZ) width decreases from 172.08μm to 156.79μm as the ratio of wire diameter to beam diameter decreases. The experimental results are basically the same as the simulation results. The errors of kerf width and HAZ width are 5.97% and 1.13% respectively.