A tensile-compressive asymmetry model for shape memory alloys with a redefined martensite internal variable. (23rd September 2019)

• Record Type: Journal Article
• Authors: Wang, Longfei; Feng, Peihua; Wu, Ying; Liu, Zishun
• Is Part Of: Smart materials and structures. Volume 28:Number 10(2019:Oct.)
• Publication Date: 2019-09-23
• Subjects: asymmetry model -- internal sub-loops -- martensitic phase -- shape memory alloys; Smart materials -- Periodicals; Strucural design -- Periodicals; 620.11
• DOI: 10.1088/1361-665X/ab3e12
• Languages: English
• ISSNs: 0964-1726

Abstract

Abstract: In this paper, through redefining the martensite internal variable of shape memory alloys (SMAs) based on the Brinson model, we propose the one-dimensional phenomenological constitutive model for SMAs to predict asymmetric behavior during tension and compression. Compared with other models, the presented model is much more continuous and efficient by using a novel expression to describe the variation in the martensitic fraction. The numerical results show that our model can successfully predict the asymmetric behaviors of SMAs during multiple tensile-compressive cycles under arbitrary temperatures. Moreover, the proposed model expands its applicable scopes by revealing the internal sub-loops of SMAs, which are caused by incomplete martensitic transitions during tensile-compressive processes. The results of numerical examples show reasonable agreement with the experimental data, which confirm the reliability of the proposed model in applications.