摘要
应用BRINSON[1]的形状记忆合金(SMA)一维本构模型及相变动力关系,编写ABAQUS中相应的U-MAT子程序,使形状记忆合金成为ABAQUS可处理的材料之一。首先计算单根形状记忆合金丝在不同温度下的应力-应变曲线,约束条件下的温度-应力曲线及循环加载下的应力-应变曲线,验证了UMAT程序的正确性。然后用UTRS子程序引入基体梁的热粘弹性质。使用ABAQUS对形状记忆合金丝加强的环氧树脂梁在侧向载荷下的变形进行仿真分析,计算结果与前期研究得到的试验结果很吻合。
Brinson's one-dimensional constitutive relation and the refined kinetic relations for phase transformation of shape memory alloy(SMA) are used to write UMAT subroutine, so that SMA becomes one member of the material library of ABAQUS. Firstly, the stress-strain relation at various temperatures, the temperature-stress relation under constrained condition and the stress-strain relation under cyclic loading of a SMA bar are calculated to verify the UMAT code. Then the thermoviscoelastic property of the beam matrix is introduced into UTRS subroutine. The bending of the SMA reinforced epoxy resin beam under lateral load is simulated by FEM code of ABAQUS and the results coincide well with experiment.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2004年第2期76-80,共5页
Acta Materiae Compositae Sinica
关键词
形状记忆合金
热粘弹性
有限元分析
Beams and girders
Bending (deformation)
Computer simulation
Epoxy resins
Finite element method
Viscoelasticity
