A numerical study of the coupling of elastic and transformation fields in pore arrays in shape memory alloy plates to advance porous structure design and optimization

作者：Zhu Pingping^*; Stebner Aaron P; Brinson L Catherine

来源：Smart Materials and Structures, 2013, 22(9): 094009.

DOI：10.1088/0964-1726/22/9/094009

A three-dimensional constitutive model for shape memory alloy (SMA) behaviors, implemented in an Abaqus user material subroutine, was used to examine localization of elastic and phase transformation fields due to the presence of structured arrays of holes in a NiTi plate. Simulations of the superelastic responses of these structures are presented and compared with a monolithic specimen. Localization of elastic fields is quantified by examining maximum von Mises stress values, transformation heterogeneities are observed through distributions of martensite volume fraction at different time steps of the simulations, and maximum principal strain values in the specimens show the combined effect of transformation and elasticity. The results provide fundamental understanding of the role of individual and coupling of individual pores in SMA structures and demonstrate the need for 3D modeling to optimize structure performance.

• 出版日期2013-9
• 单位西北大学