文献类型：期刊文献

中文题名：基于有限元仿真的聚酰亚胺切削参数优化

英文题名：Optimization of Polyimide Cutting Parameters Based on Finite Element Simulation

作者：张航[1];雷学林[1];何云[1];李子璇[1]

机构：[1]华东理工大学机械与动力工程学院,上海200237

年份：2022

卷号：48

期号：2

起止页码：265

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：Scopus;北大核心:【北大核心2020】；CSCD:【CSCD_E2021_2022】；

基金：上海航天科技创新基金(SAST2019-089)。

语种：中文

中文关键词：聚酰亚胺;有限元;本构模型;铣削

外文关键词：polyimide;finite element analysis;constitutive model;milling

摘要：采用VUMAT子程序嵌入法,考察了聚酰亚胺高分子材料弹性变形阶段的应力-应变关系,并通过三维热-力耦合有限元模型分析了切削工艺参数对聚酰亚胺铣削过程中切削力、切削温度和切屑形态的影响规律。结果发现:随着进给量的增大,仿真的切削力、切削温度增加或升高,切屑的带状化程度变得严重。随后利用切削实验,验证了仿真模型的有效性与准确性,并获得了聚酰亚胺的最优切削工艺参数:进给量为0.20~0.30 mm/r。
Using the VUMAT subroutine embedding method,the stress-strain relationship in the elastic deformation stage of the polyimide polymer material is described,and the effects of the cutting process parameters on the cutting force of the polyimide milling process are analyzed through the three-dimensional thermal-mechanical coupling finite element model.The influence law on cutting force,temperature and chip morphology of the polyimide milling process is analyzed through the three-dimensional thermal-mechanical coupling finite element model.The result is that as the feed rate increases,the simulated cutting force and cutting temperature increase as well,and the degree of banding of chips will become serious.Subsequently,the cutting experiment was used,and the cutting force difference between the simulation and experiment was up to 18%,and the cutting temperature difference was up to 23%.When the feed rate increases,the degree of chip curling increases and the surface texture becomes deeper.When the feed rate is 0.15 mm/r and 0.45 mm/r,the chip edge tears.Defects such as adhesion,drawing,and layup of tiny chips on the machined surface of the workpiece cause the material microporous flow channel to be blocked.This constitutive model has certain universality to polymer materials.The validity and accuracy of the simulation model have been verified,and the optimal milling process parameters for polyimide have been obtained:milling depth(ap)is 1 mm,milling speed(v)is 75 m/min,and feed amount f=0.20~0.30 mm/r.