虑及温度影响的CFRTP正交切削仿真与实验研究
Simulation and experimental study of CFRTP orthogonal cutting considering the influence of temperature
魏钢 1王福吉 1贾振元 1鞠鹏程 1胡晓杭 1付饶1
作者信息
- 1. 大连理工大学 机械工程学院,大连 116024;高性能精密制造全国重点实验室,大连 116024
- 折叠
摘要
碳纤维增强热塑性树脂基复合材料(Carbon fiber reinforced thermoplastic polymer,CFRTP)是高端装备减重增效的优选材料.而CFRTP是一种典型的难加工材料,加工中损伤频发.本文对切削CFRTP时的材料去除及损伤形成过程进行了仿真与实验研究.CFRTP切削时易产生塑性变形,且材料性能受温度影响较大.本文建立CFRTP三维正交切削细观仿真模型,并引入J-C模型表征树脂在不同温度下的弹塑性变形.分析了温度及纤维方向角对CFRTP切削去除过程的影响.结果表明,常温下切削,0°及45°纤维方向角时,已加工面较平整,加工质量较好;90°及135°纤维方向角时,纤维弯曲程度明显增大,已加工面有裂纹产生,加工质量较差.高温下切削,0°纤维方向角时,已加工面出现未去除材料;45°纤维方向角时,已加工面出现裂纹,部分纤维未被切断;90°及135°纤维方向角时,已加工面出现更大开裂,工件出现明显的沿厚度方向上的面外变形,发生面外变形的材料难以被有效去除.
Abstract
Carbon fiber reinforced thermoplastic polymer(CFRTP)is the preferred material for weight loss and efficiency improvement of high-end equipment.However,CFRTP is a typical difficult-to-machine material,and damage occurs frequently during processing.In this paper,the process of material removal and damage formation during cutting CFRTP was simulated and experimentally studied.CFRTP is prone to plastic deformation during cut-ting,and the material properties are greatly affected by temperature.In this paper,a three-dimensional orthogonal cutting simulation model of CFRTP was established,and the J-C model was introduced to characterize the elastic-plastic deformation of resin at different temperatures.The effects of temperature and fiber orientation angle on the cutting removal process of CFRTP were analyzed.The results show that when cutting at room temperature,and the fiber orientation angles are 0° and 45°,the machined surface is relatively flat and the processing quality is better;When the fiber orientation angles are 90° and 135°,the bending degree of the fiber increases obviously,and there are cracks on the machined surface,and the processing quality is poor.When cutting at room temperature,and the fiber orientation angle is 0°,the unremoved material appears on the machined surface;when the fiber orientation angle is 45°,cracks and fiber pull-out phenomenon appear on the machined surface.When the fiber orientation angles are 90° and 135°,the machined surface is more cracked,and the workpiece has obvious out-of-plane deformation along the thickness direction.The material with out-of-plane deformation is difficult to be effectively removed.
关键词
CFRTP/温度/正交切削/加工损伤/仿真Key words
CFRTP/temperature/orthogonal cutting/processing damage/simulation引用本文复制引用
基金项目
国家自然科学基金(52090053)
国家自然科学基金(52105432)
国家自然科学基金(52130506)
国家重点研发计划(2018YFA0702803)
大连市科技创新基金项目(2021RD08)
大连市科技创新基金项目(2022JJ12GX027)
出版年
2024
NETL
NSTL
万方数据