Plastic and transformation interactions of pores in shape memory alloy plates

Pingping Zhu*, Aaron P. Stebner, L. Catherine Brinson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

A three-dimensional constitutive model for shape memory alloys (SMAs) is developed along the lines of the Stebner-Brinson (SB) implementation of the Panico-Brinson model. Plastic kinematic hardening behavior is simulated in addition to elastic deformation and phase transformation. A series of finite element simulations is carried out using this model to investigate the localization effects of the stress and strain field on NiTi plates with structured arrays of pores. The application of this model on porous architectures provides insight into how geometric features influence the mechanics of the structure. The incorporation of plastic deformation shows a marked decrease in the maximum stress levels; these results are more consistent with experimental data as compared to the original SB model. Furthermore, the new results demonstrate that clustered pores lead to more distributed stresses and transformation compared to a dispersed configuration of pores, indicating the importance of pore geometry in determining the stress and strain distribution. The improved model provides a practical tool toward design and optimization of porous SMA structures.

Original languageEnglish (US)
Article number104008
JournalSmart Materials and Structures
Volume23
Issue number10
DOIs
StatePublished - Oct 1 2014

Keywords

  • localization
  • plasticity
  • porous shape memory alloy (SMA)
  • transformation

ASJC Scopus subject areas

  • Signal Processing
  • Civil and Structural Engineering
  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering

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