Bending analysis of textured polycrystalline shape memory alloy beams

Published

Conference Paper

In this paper a micro-mechanical model that incorporates single crystal constitutive relationships is used for studying the pseudoelastic response of polycrystalline shape memory alloy beams subjected to bending. In the micro-mechanical framework, the stress-free transformation strains of all the 24 correspondence variant pairs (CVPs) obtained from the crystallo-graphic data of NiTi are used, and the overall transformation strain is obtained by defining a set of martensitic volume fractions corresponding to active CVPs during a phase transformation. A three-dimensional finite element model is used and a polycrystalline beam is modeled based on Voronoi tessellations. The effect of crystallographic texture and the tensioncompression asymmetry on the bending response of superelas-tic beams is studied. The results of texture measurements are used to assign appropriate crystal orientations to the grains in the model. By considering various combinations of crystal orientations, the effect of preferred crystallographic texture on the bending response is studied. The size effect is also studied by considering two polycrystal structures with different number of grains. Copyright © 2012 by ASME.

Full Text

Duke Authors

Cited Authors

  • Mirzaeifar, R; DesRoches, R; Yavari, A; Gall, K

Published Date

  • December 1, 2012

Published In

  • Asme 2012 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Smasis 2012

Volume / Issue

  • 2 /

Start / End Page

  • 117 - 124

International Standard Book Number 13 (ISBN-13)

  • 9780791845103

Digital Object Identifier (DOI)

  • 10.1115/SMASIS2012-8008

Citation Source

  • Scopus