Damage-based life prediction model for uniaxial low-cycle stress fatigue of super-elastic NiTi shape memory alloy microtubes. (2nd July 2015)

• Record Type: Journal Article
• Authors: Song, Di; Kang, Guozheng; Kan, Qianhua; Yu, Chao; Zhang, Chuanzeng
• Is Part Of: Smart materials and structures. Volume 24:Number 8(2015:Aug.)
• Publication Date: 2015-07-02
• Subjects: NiTi shape memory alloy -- super-elasticity -- low-cycle fatigue -- damage evolution -- life prediction; Smart materials -- Periodicals; Strucural design -- Periodicals; 620.11
• DOI: 10.1088/0964-1726/24/8/085007
• Languages: English
• ISSNs: 0964-1726

Abstract

Abstract: Based on the experimental observations for the uniaxial low-cycle stress fatigue failure of super-elastic NiTi shape memory alloy microtubes (Song et al 2015 Smart Mater. Struct. 24 075004 ) and a new definition of damage variable corresponding to the variation of accumulated dissipation energy, a phenomenological damage model is proposed to describe the damage evolution of the NiTi microtubes during cyclic loading. Then, with a failure criterion of D c = 1, the fatigue lives of the NiTi microtubes are predicted by the damage-based model, the predicted lives are in good agreement with the experimental ones, and all of the points are located within an error band of 1.5 times.