缩松圆筒铸件的应力分布研究  

Analysis of Stress Distribution on Effect of Cast Isolated Shrinkage Porosity

作　　者：康建雄[1] 高行山[1] 

机构地区：[1]西北工业大学,陕西西安710129

出　　处：《中国铸造装备与技术》2015年第6期60-63,共4页China Foundry Machinery & Technology

摘　　要：基于Gurson本构方程对含有缩松的圆筒铸件在压应力下的应力分布进行了数值模拟,讨论了不同缩松位置和缩松等级对铸件应力分布的影响。结果表明,缩松位置和缩松等级对铸件材料应力分布有着显著影响。对于内压铸件,不同的缩松位置,铸件应力不同,缩松处于内壁时Mises应力最大;空穴率大于0.5时,随着缩松等级的提高,铸件的Mises应力增大,空穴率小于0.5时,空穴率变化对应力影响不大。Based on Gurson model, the numerical simulation was carried out on the cylinder cast isolated shrinkage porosity to analyse the effect of different positions of shrinkage porosity and different levels of shrinkage porosity on the stress distribution of the cast material. The results showed that they has significant influence on the fatigue performance and fatigue life of cast material, the stress of the cast was different for different positions, there is a maximum stress when the position is inwall. When the cavity ratio of the cast is greater than 0.5 the higher the level of shrinkage porosity is the higher the Mises stress will be, when the cavity ratio is less than 0.5, the change of cavity ratio on the cast can be ignored.

关 键 词：Gurson本构方程 数值模拟 缩松 应力分布 

分 类 号：TG24[金属学及工艺—铸造]