Investigation on Two-way Shape Memory Mechanism and its Applications

第一年（2001年）从根本上研究了形状记忆合金的致动能力（即双向形状记忆效应）。(1)研制了双向形状记忆运动中的三维运动测量系统。应变测量采用罗塞式应变片。为实现形状记忆合金的循环温度控制，研制了温度控制系统。(2)利用cu基形状记忆合金管，实验研究了单轴拉伸和单轴扭转简单加载训练所获得的双向形状记忆效应。此外，从双向形状记忆机制的角度观察和分析了训练后材料的微观结构变化。(3)通过对cu基形状记忆合金薄壁管试样施加轴向力和扭矩的联合载荷，实验研究了复合载荷训练获得的双向形状记忆效应。第二年（2002年），对第一年获得的实验数据进行了分析，讨论了形状记忆合金的致动能力，并进行了几次附加实验。结果表明，形状记忆合金是一种独特而有趣的工程致动器设计材料。这些成功的研究结果发表在几个国际期刊上。

In the first year (2001), the actuator ability of shape memory alloy (that is, two-way shape memory effect) was investigated fundamentally in the following way.(1) The measuring system of three-dimensional movement in the two-way shape memory movement was developed. The rozet-type strain gauge was employed for the strain measurement. The temperature control system was developed to give the cyclic temperature to the shape memory alloy.(2) The two-way shape memory effect obtained by the simple loading training (the uniaxial tension and simple torsion) was experimentally investigated by \using the Cu-based shape memory alloy tube. Moreover, the micro-structural change of the material obtained by the training were observed and analyzed from the view point of two-way shape memory mechanism.(3) The two-way shape memory effect obtained by the complex loading training was experimentally investigated by applying the combined loads of axial force and torque to the thin-walled tube specimen of Cu-based shape memory alloy.In the following year (2002), the experimental data obtained in the first year were analyzed and the actuating ability of shape memory alloy was discussed, and several additional experiments were performed. In the result, the shape memory alloy was found to be quite unique and interesting material for designing the engineering actuator.These successful results were published in several international journals.