为准确获取 SMA驱动的勘测机器人驱动器性能,采用大变形多晶形状记忆合金马氏体相变的三维本构模型描述 SMA力学关系,嵌入 UMAT用户自定义材料子程序,建立了 SMA 驱动器的有限元分析模型.研究表明,SMA丝直径对驱动器性能影响较大,驱动器输出力随 SMA 丝直径增大而增大.研究方法可为同类型的 SMA力学性能描述提供参考,研究结果可指导 SMA驱动器的设计.
Research on Characteristics of SMA Driver for Survey Robot
In order to accurately obtain the performance of SMA-driven survey robot actuator,the three-dimensional constitutive model of martensitic transformation of large deformation polycrystalline shape memory alloy was used to describe the mechanical relationship of SMA,and the finite element analysis model of SMA actuator was established by embedding UMAT user-defined material subroutine.The results show that the diameter of the SMA wire has a great influence on the performance of the actuator,and the output force of the actuator increases with the increase of the diameter of the SMA wire.The research method can provide a reference for the description of the mechanical properties of the same type of SMA,and the research results can guide the design of SMA actuators.
万方数据
维普
