粘弹基体形状记忆合金梁弯曲的仿真分析

详细信息

SIMULATION OF THE BENDING OF SHAPE MEMORY ALLOY(SMA) REINFORCED THERMOVISCOELASTIC BEAM

School of Civil Engineering and Mechanics, Shanghai Jiaotong University,Shanghai 200030,China

摘要

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UMAT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。
- 形状记忆合金 /
- 热粘弹性 /
- 有限元分析
Abstract: In this work, 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.
- shape memory alloy /
- thermoviscoelasticity /
- finite element analysis