摘要
非均匀分布的残余应力是引起工件变形的主要原因。为了揭示装夹方案对残余应力的影响 ,利用有限元技术模拟了工件加工过程中不同的装夹方案 ,并分析了模拟结果。结果表明 ,装夹位置对残余应力分布具有重要影响 ,而装夹顺序对残余应力的分布和幅值无较大影响。通过进一步对比分析各种装夹方案中残余应力引起的工件变形得出结论
The uneven distribution of the residual stress is the main element to cause the deformation of a workpiece. To reflect the relationship between clamps and residual stress, finite element models with different clamping schemes were built and the clamping process was simulated. It is verified that clamping points have a great effect on the residual stress, but the effect of the clamping order is little. In addition, the workpiece distortion introduced by the residual stress is analyzed and workpiece distortions are compared under different clamping conditions. Finally, a conclusion is obtained: to reduce the workpiece deformation due to the residual stress, it is advisable to adopt even distributed clamps without regard to the clamping sequence.
出处
《航空学报》
EI
CAS
CSCD
北大核心
2003年第4期382-384,共3页
Acta Aeronautica et Astronautica Sinica
基金
国家自然科学基金 ( 5 0 175 10 2 )
国防型号工程( 0 0 1810 0 785 )资助项目
关键词
装夹
残余应力
优选
加工变形
Deformation
Finite element method
Optimization
Residual stresses
Simulation
