Delopment of Multiway-Actuation Shape Mmeory Composite and Evaluation of Long Term Functional Property

由两种形状记忆合金带和形状记忆聚合物薄膜复合而成的形状记忆复合带在加热和冷却过程中出现三向变形特性。如果向形状记忆合金线注入氮离子，则疲劳寿命变长。在受应力控制的子回路加载的形状记忆合金中，出现蠕变或蠕变回复以及应力松弛或蠕变回复。形状记忆合金带材的扭转疲劳寿命曲线用幂函数表示。利用两种具有形状记忆效应和超弹性的形状记忆合金带，研制了自动开关门和自动开关百叶窗两种小型驱动器模型。

n the shape-memory composite belt laminated with two kinds of shape-memory alloy tape and shape-memory polymer film, three-way deformation properties appear during heating and cooling. If the nitrogen ion is implanted to the shape-memory alloy wire, the fatigue life becomes longer. In the shape memory alloy subjected to the stress-controlled subloop loading, creep or creep recovery and stress relaxation or creep recovery appear. The torsional fatigue life curve of the shape-memory alloy tape is expressed by a power function. Two kinds of small actuator models, an automatic opening and closing door and an automatic opening and closing blind, were developed by using two kinds of shape-memory alloy tapes showing shape memory effect and superelasticity.