摘要
钣金类零件的制造是根据自身经验来制定生产工艺的,一直以来对工艺的革新较少,造成生产合格率偏低、成本高。而影响板材冷成形性能最主要的因素即为材料自身的成形性能。以U型蒙皮为研究对象,进行试验研究与材料分析,为有限元模型提供参数与验证。基于弹塑性有限元理论,通过测试毛坯材料的应力应变数据,建立材料的本构模型,准确预测闸压过程中钣金结构的应力、应变和回弹量。创建闸压成形仿真模型,模型验证后,进行闸压后试片内部应力应变分析、试片厚度,以及回弹分析。基于建立的有限元模型进行了毛坯材质与闸压方向的影响分析。
The manufacturing of sheet metal parts is based on its own experience to develop the production process which has less innovation,resulting in a low qualified rate of production,high cost.The most important factor affecting the cold forming performance of sheet metal is the forming performance of the material itself.Takes U-shaped skin as the research object,conducts experimental research and material analysis,and provides parameters and verification for the finite element model.Based on the elastic-plastic finite element theory,through testing the stress and strain data of blank material,the constitutive model of material is established,so as to accurately predict the stress,strain and spring-back of sheet metal structure in the process of gate pressure.The simulation model of gate pressure forming was established.After the model verification,the stress and strain analysis,thickness and spring-back analysis of the test piece after gate pressing were carried out.The influence of blank material and gate pressure direction is analyzed based on the established finite element model.
作者
金妍
汪海峰
吴华东
王志成
王晓臣
JIN Yan;WANG Haifeng;WU Huadong;WANG Zhicheng;WANG Xiaochen(Shenyang Aircraft Corporation,Shenyang 110850,China)
出处
《飞机设计》
2023年第2期58-66,共9页
Aircraft Design
关键词
蒙皮
闸压
有限元
参数影响
skin
gate pressure
finite element
parameters influence
