Effective initial and subsequent loading surfaces for phase transformation in TPMS-SMAS

Ali N. Alagha, Nguyen Van Viet, Wael Zaki

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

In this paper, the effective behavior of shape memory alloy (SMA) triply periodic minimal surface (TPMS) structures is investigated by means of finite element analysis and numerical homogenization. For this purpose, the onset and subsequent thresholds of phase transformation are determined considering TPMS primitive, gyroid, and diamond unit cells subjected to different loading conditions. At all relative densities studied, the initial phase transformation loading surfaces corresponding to the different geometries considered are found to be reasonably well represented by the anisotropic Hill's and von Misses yield criterions. The observed surfaces, either shrink or expand as the effective martensite volume fraction increases, depending on TPMS geometry. The determination of subsequent loading surfaces as a function of the effective volume fraction of martensite shows a nonlinear hardening behavior, which seems to follow a unique trend for the different geometries considered. Ultimately, the loading surfaces are found to reach an asymptotic state with distinctly different features compared to their initial shapes.

Original languageBritish English
Title of host publicationProceedings of ASME 2021 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2021
ISBN (Electronic)9780791885499
DOIs
StatePublished - 2021
EventASME 2021 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2021 - Virtual, Online
Duration: 14 Sep 202115 Sep 2021

Publication series

NameProceedings of ASME 2021 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2021

Conference

ConferenceASME 2021 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2021
CityVirtual, Online
Period14/09/2115/09/21

Keywords

  • Loading surface
  • Shape memory alloy
  • TPMS

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