摘要
碳纤维增强树脂基复合材料(CFRP)因其优越的性能被应用于航空航天领域。对于CFRP切削加工研究,目前主要集中在单次铣削上,但在实际加工中多次铣削策略被广泛应用,而多次铣削对面下损伤的影响是不可忽略的。为了解决这个问题,利用VUMAT子程序建立三维Hashin失效准则及CFRP多次铣削有限元模型。通过试验验证了仿真模型的准确性。利用该模型分析了切削力和面下损伤随纤维方向角的变化规律。结果表明,多次铣削策略中第2次铣削切削力小于第1次,且切削力遵循90°>135°>45°>0°的规律;面下损伤低于单次铣削,损伤因子随纤维方向角度的增大而增大,其中纤维方向角为0时损伤因子最小,135°时损伤因子最大,面下损伤最严重。
Carbon fiber reinforced polymers(CFRP)are used in the field of aerospace due to their superior properties.At present,the researches on CFRP cutting mainly focus on single milling,but the multiple milling strategies are widely used in actual machining,the influence of multiple milling on subsurface damage cannot be ignored.In order to make up for this gap,VUMAT subroutine is used to establish three-dimensional Hashin failure criterion and CFRP multiple milling finite element model.The accuracy of the simulation model is verified by experiments.The model is used to analyze the variation of cutting force and surface damage with fiber direction angle(0°,45°,90°,135°).The results show that the cutting force of the second milling is less than the first milling in the multiple milling strategies,and the cutting force follows the rule of 90°>135°>45°>0°.The subsurface damage is lower than that of single milling,and the damage factor increases with the increase of fiber direction angle.When the fiber direction angle is 0,the damage factor is the smallest,and the fiber direction angle is 135°,the damage factor is the largest,the subsurface damage is the most serious.
作者
郑华林
王贵鑫
宁海峰
胡志伟
ZHENG Hualin;WANG Guixin;NING Haifeng;HU Zhiwei(Southwest Petroleum University,Chengdu 610500,China)
出处
《航空制造技术》
CSCD
北大核心
2022年第5期36-42,共7页
Aeronautical Manufacturing Technology
基金
四川省科技厅重点研发项目(19ZDZX0055)。
