摘要
基于NARAYANASWAMY提出的虚温定义,用虚温表示的温度变化产生的折算应变率替代Swanson模型中的应变率修正函数,获得了基于虚温定义的粘弹性材料的应力应变本构方程,并导出基于虚温定义的粘弹性非线性有限单元法计算公式。计算结果验证了此基于虚温定义的粘弹性分析方法的正确性。
The intrinsic stress and strain equation of viscoelastic material based on fictive temperature put forward by NARAYANASWAMY was gained in this paper, when the correction function of strain ratio in Swanson model was replaced by the obversion strain ratio presented by fictive temperature caused by temperature change, The computation formula of nonlinear finite dement method for viscoelastic material was derived based on fictive temperature. The calculation results showed that this analysis method was correct.
出处
《上海航天》
北大核心
2007年第5期19-22,共4页
Aerospace Shanghai
关键词
粘弹性材料
虚温
应力应变本构方程
非线性有限单元法
Viscoelastic material
Fictive temperature
Intrinsic stress and strain equation
Nonlinear finite element method
