受内压厚壁圆筒高温下蠕变变形的有限元分析
Finite Element Analysis of Creep Deformation of Thick Wall Cylinder Subjected to Internal Pressure at Elevated Temperature
沈海宁1, 杨亚平2
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作者单位:(1. 青海大学 机械系, 青海 西宁 810016; 2. 青海大学 建筑工程系, 青海 西宁 810016)
中文关键字:厚壁圆筒; 有限元; 蠕变变形
英文关键字:thick wall cylinder; finite element; creep deformation
中文摘要:在有限元商业软件ABAQUS/standard的平台上,利用用户子程序UMAT实现了材料的蠕变本构,进而计算了厚壁圆筒简化模型经50 h蠕变后的应力分布。计算包含均匀材料圆筒和功能梯度材料圆筒两种情形。并将有限元计算结果与问题的理论解进行了对照,两者符合得很好。
英文摘要:The creep constitutive equation of materials was implemented using ABAQUS user's material subroutine UMAT. The stress distribution of thick wall cylinder after 50 h creep is computed, which contains two situations: homogenous material and functional graded material. The calculating results agree well with the analytical solution of stress distribution.