摘要
对TC4材料的条状零件进行侧铣加工,其加工表面会产生一残余应力层。通过对零件的应力层进行腐蚀剥层,测量此过程中零件挠度的变化,运用逆向思维由底层的应力值和挠度的变化逐步反推上层的应力值,最终得到应力自平衡前的分布情况,排除了零件尺寸和形状因素的影响。基于此应力值可以较准确预测不同尺寸和形状的零件因加工残余应力而产生的变形。运用有限元模拟分析进一步验证了此方法的正确性。
Flank milling was used to machine TC4 workpiece, and there would be high residual stress induced by milling in the superficial layer of the workpiece. The stress layer was corroded gradually and the changes of workpiece＇s bending deflection were measured during the corrosion process. With converse thinking, the residual stress of the upper layers was calculated based on the residual stress of the bottom layers and the changes of the bending deflection, and the stress value before self-balancing was obtained, so it ruled out the factors of the workpiece＇s size and shape. The deformation of workpiece with different sizes and shapes can be predicted accurately based on the stress value. The correctness of the method was verified by Finite Element Analysis （FEA）.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2014年第8期1991-1996,共6页
Rare Metal Materials and Engineering
基金
教育部"高等学校博士学科点专项科研基金"(20123218120025)
国防技术基础科研项目(J1520130001)
中央高校基本科研业务费专项资金(NS2012011)
关键词
残余应力
腐蚀
挠度
有限元
residual stress
corrosion
bending deflection
Finite Element Analysis （FEA）
