权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Construction of Three-dimensionally Contorolled Positioning Material Device by Using Shape Memory Alloy

利用形状记忆合金构建三维控制定位材料装置

基本信息

批准号：
09650098
负责人：
TOKUDA Masataka
金额：
$ 0.32万
依托单位：
Mie University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

项目摘要

The aim of this research work is to try to construct/design the three-dimensionally controlled positioning material device by using the Shape Memory Alloy with the combined bias stresses. This positioning system may not have some quick responses to the change of atomoshere. On the other hand, the device may be quite stable and tough in a longterm, and this device have an important role in the robot-systems which response to the gradual temperature change of atmosphere (air, river, ocean and so on) in a day, or in a year. The most important point in this research work is to formulate the reliable consititutiveequations which can predict the complicated behaviors of shape memoryalloy under the general thermo-mechanical conditions. It is very important to note that the shape memory alloy is controlled by 7parameters, that is, 6 stress components and temperature. This reliable and precise constitutive equations are indispensable to design the positioning system which can behaive according … More to our purpose/intension. Based on this idea, in the first fiscal year of this project, a set of constitutive equations was formulated. In this formulation, the meso-mechanical approach was used, because the shape memory materials used in the industrial application arepolycrystalline materials whose structure is not in homogeneous. In the(final) next fiscal year, the reliability and accuracy of the formulated constituive equations were confirmed experimentally by applying the combined loads of axial force and torque to the thin-walled tubular specimens made of Cu-based shape memory alloy. Moreover, in this experiments, the assumptions used in the formualtion of constitutive equations are also confirmed by the observation of microstructural change in the materials subjected to the complex thermo-mechanical loading conditions including the loading path. In the final stage of this research work, an idea of pilot device of positioning device was proposed, which is controlled by the three parameter ; torsional stress, tensile stress and temperature. Unfortunetely, the detail of this device is still under discussion. The head investigator hopes to publish the detail of the device in some near future. Less

本研究的目的是尝试利用形状记忆合金在复合偏置应力作用下，构造/设计三维可控的定位材料装置。这种定位系统可能对大气的变化没有快速的反应。另一方面，该装置可以在长期内相当稳定和坚韧，并且该装置在响应大气（空气、河流、海洋等）在一天或一年内的逐渐温度变化的机器人系统中具有重要作用。本研究工作的重点是建立可靠的本构方程，以预测形状记忆合金在一般热力学条件下的复杂行为。非常重要的是要注意，形状记忆合金由7个参数控制，即6个应力分量和温度。这些可靠而精确的本构方程是设计定位系统所必需的， ...更多信息符合我们的目的/意图。基于这一想法，在该项目的第一个财年，制定了一套本构方程。由于工业上使用的形状记忆材料是多晶材料，其结构是不均匀的，因此在该公式中采用了细观力学方法。在（最终）下一财年，通过对铜基形状记忆合金薄壁管试件施加轴向力和扭矩的组合载荷，验证了本构方程的可靠性和准确性。此外，在本实验中，通过观察材料在包括加载路径在内的复杂热-力加载条件下的微观结构变化，也证实了本构方程建立中所采用的假设。扭转应力、拉伸应力和温度。不幸的是，这个装置的细节仍在讨论中。首席研究员希望在不久的将来公布该设备的细节。少