摘要
在模拟软件中,建立带压边圈的杯形件拉延模具模型,设杯形件材料为弹塑体本构模型,考虑厚度的应力、应变变化,通过数值模拟拉延成形,在不同压下位移时,求得凹模圆角处及附近的板料厚度截面等效应变、等效应力以及厚度变化值的分布;在此基础上,对压下位移不同阶段的凹模圆角成形区及附近区域的应力、应变值进行分析,其数值分别沿凹模圆角由外径向内径方向数值增大;另外得出在不同位置厚度发生变化曲线。总之,研究厚度方向的成形状态变化的方法,对揭示板料成形时凹模圆角厚度变化的机理具有一定理论和工程实用意义。
The cup drawing model with a binder is set up in the simulation soft, choosingthe material constitutive equation is elasticity and plasticity.The result of the effective strain and the effective stresss in cavity die circular section is caculated by simulating the cup drawing in different states cosidering strain, stress and thickness changes. Furthermore, the strain and the stress increase from outside radius to inside radius. At the same time the thickness change curve in the area is also drawed. In conclusion, the research of the stress and strain changes is beneficial to reveal the principle and takes on an academic and engineering application meaning.
出处
《热加工工艺》
CSCD
北大核心
2008年第5期56-58,共3页
Hot Working Technology
基金
安徽省教育厅自然科学基金项目(KJ2007B189)
关键词
仿真
凹模圆角
厚度变化
等效应变
等效应力
simulation
cavity die circular-arc
thickness variety
effective strain
effective stress
