CFRP铣削有限元模型建立及切削力仿真分析

为探索碳纤维增强树脂基复合材料(CFRP)铣削加工过程中切削力与工艺参数之间的映射关系,建立CFRP铣削加工有限元仿真模型并对切削力进行分析。基于ABAQUS软件通过定义材料属性、材料失效模型、纤维铺层数和纤维方向建立了CFRP铣削加工二维有限元仿真模型,并对该模型进行了实验验证。基于该模型,分析了切削力与纤维方向角、铣削速度、每齿进给量和刀具前角等工艺参数之间的映射关系。仿真结果表明:纤维方向角从0°增大到90°,切削力呈现降低趋势,而纤维方向角从90°增大到180°,切削力呈现增大趋势。随着切削速度和每齿进给量的增大,切削力随之增大,而随着刀具前角增大,切削力随之减小。

Establishment of Finite Element Model for Milling CFRP and Simulation Analysis of Cutting Forces

In order to explore the mapping relations between cutting force and process parameters during milling process of carbon fiber reinforced composite (CFRP),the finite element model of CFRP milling process and simulation analysis of cutting force were carried out. Based on ABAQUS software,the CFRP milling finite element model was established by defining material properties,material failure models,fiber layup and fiber orientation,and the model was verified by cutting experiments.Based on the model,the influence of process parameters such as fiber orientation angle,milling speed,feed per tooth and rake angle on cutting force is analyzed. The simulation results show that the cutting forces decrease with the increase of the fiber angle from 0° to 90°,while the cutting force increase with the increase of the fiber angle from 90° to 180°.The cutting force increases with increasing milling speed and feed per tooth,and decreases as the tool rake angle increases.