摘要
针对ERW焊管排辊成形过程中带刚反复加载、卸载的复杂成形工艺特点,提出了考虑包辛格效应的混合硬化材料本构模型;通过ABAQUS用户材料子程序VUMAT的二次开发,对混合硬化材料的本构模型进行了有限元程序实现;基于混合硬化模型,对ERW焊管排辊成形过程进行了数值模拟,分析了成形过程中应力应变的变化规律,并对计算结果进行了对比。结果表明,混合硬化模型能够很好地体现ERW焊管排辊成形反复加载、卸载的成形工艺特点;不同的材料硬化模型对排辊成形过程中板料的应力应变产生较大影响。
According to the processing characteristic of ERW cage roll forming a mixed hardening constitutive equation considering bauschinger effect is put forward. A user-defined material routine （VUMAT） of the commercial finite element code ABAQUS/ Explicit is developed, and the mixed hardening constitution model is realized by the finite element method through the VUMAT. Based on the mixed hardening constitutive equation, the numerical simulation of cage roll forming process of ERW pipe is performed. The variation of equivalent stress and strain is analyzed, and the calculated results are also compared. The results shown that the mixed hardening model is suit for the processing characteristic of ERW pipe cage roll forming, and the different material hardening model has important effects on the variation of equivalent stress and strain of strip steel.
出处
《塑性工程学报》
EI
CAS
CSCD
北大核心
2008年第6期81-86,共6页
Journal of Plasticity Engineering
