Response of porous SMA: a micromechanical study
Journal Title: Frattura ed Integrità Strutturale - Year 2014, Vol 8, Issue 29
Abstract
Lately porous shape memory alloys (SMA) have attracted great interest as low weight materialscharacterized by high energy dissipation capability. In the present contribution a micromechanical study ofporous SMA is proposed, introducing the simplifying hypothesis of periodic distribution of voids. Themechanical response of the heterogeneous porous medium is derived by performing nonlinear finite elementmicromechanical analyses considering a typical repetitive unit cell made of a circular hole in a dense SMA matrixand prescribing suitable periodicity and continuity conditions. The constitutive behavior and the dissipationenergy capability of the porous Nitinol are examined for several porosity levels. Numerical applications areperformed in order to test the ability of the proposed procedure to well capture the overall behavior and the keyfeatures of the special heterogeneous material.
Authors and Affiliations
V. Sepe, S. Marfia, F. Auricchio
Keywords
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- EP ID EP131740
- DOI 10.3221/IGF-ESIS.29.09
- Views 71
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