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论文类型：期刊论文

发表时间：2010-05-01

发表刊物：SMART MATERIALS & STRUCTURES

收录刊物：SCIE、EI、Scopus

卷号：19

期号：5

ISSN号：0964-1726

摘要：The strain sensing principle of shape memory alloy (SMA) based on its electrical resistance (ER) value is analyzed in this paper. A mathematical model to describe this principle is developed based on the relationship between the electrical resistivity and the martensite fraction of an SMA wire. The proposed model can be used at different temperatures and different initial conditions. To verify the validity of the proposed model, various experiments were conducted. The numerical results based on the proposed model agree well with experimental results, indicating that an SMA wire with a proper model can be utilized as a sensing element.