摘要
利用高度非线性软件MSC.Marc,采用弹塑性大变形有限元法对7075铝合金预拉伸厚板在轧制、淬火过程中残余应力的分布进行数值仿真.文中顺次地仿真出轧制-升温-保温-急冷四个过程中产生的残余应力,研究轧制残余应力、升温-保温应力对最终淬火应力的影响.结果表明小压缩量下,整体轧制应力小于淬火应力,轧制应力在升温-保温过程中减小,在急冷过程中急剧增大,最终表现为淬火应力.轧制应力对淬火应力影响很小,淬火应力却彻底改变了原有轧制应力的大小和分布.
The residual stresses of 7075 aluminum alloy thick-plate in the process of roiling and quenching was simulated by using highly non-liner software MSC. Marc and elas-plastic large deformation FEM methods. In addition, the residual stresses of rolling, temperature rising-preservation-falling were simulated respectively, and the influence of rolling stress and temperature rising-preservation stress towards quenching stress were studied too. The result shows that in small reduction case, the whole rolling stress is smaller than quenching stress; the rolling stress decreases when temperature rising-preservation and increases rapidly when quenching, the last stress remained is quenching stress. The influence of rolling stress towards quenching stress is little, but quenching stress totally changes the original rolling stress.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2006年第1期88-91,共4页
Journal of Beijing University of Aeronautics and Astronautics
基金
国防基础科研资助项目(59975008)
航空支撑技术预研资助项目(418010-6)
关键词
残余应力
冷轧
淬火
热处理
塑性变形
residual stresses
cold rolling
quenching
heat treatment
plastic deformation
