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URN etd-0823106-214117 Statistics This thesis had been viewed 4289 times. Download 6735 times. Author You-Wen Hu Author's Email Address No Public. Department Mechanical Engineering Year 2005 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 62 Title A Study on the Mechanical Property of
Shape Memory Alloy
Keyword Elastic Modulus Shape Memory Alloy Shape Memory Alloy Elastic Modulus Abstract The shape memory effect of the shape memory alloy (SMA) was driven by its phase transformation caused by temperature change. Previous researches show that the SMA present different stiffness and loading ability under different operating temperature. This study makes assumption as the stiffness of SMA is a function of its temperature. A cantilever beam with SMA was heated by electric current. Then, the load and deflection under different operation temperature of SMA cantilever beam were measured. The results were used to estimate the elastic modulus (E) of the SMA by the cantilever beam deflection formula. A series of experiments were carried out in the study. The experimental results were used to define the relative function between elastic modulus of SMA with temperature by the regression analysis method.
Experimental results shown that the elastic modulus of SMA depends on its temperature in the shape transformation range form 100% austenite to 100% martensite. In this phase transformation range and under its elastic limit of shape memory effect range , the relationship of elastic modulus of SMA with temperature is nonlinear. A theoretical expression of elastic modulus of SMA with its temperature was established here.
Advisor Committee Long-Jyi Yeh - advisor
Chen-Sheng Chen - co-chair
Guang-Je Lai - co-chair
Files Date of Defense 2006-07-13 Date of Submission 2006-08-23