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Experimental and numerical investigation of the stable crack growth regime under pseudoelastic loading in shape memory alloys
Author(s): Behrouz Haghgouyan; Sameer Jape; Ceylan Hayrettin; Theocharis Baxevanis; Ibrahim Karaman; Dimitris C. Lagoudas
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Paper Abstract

A combined experimental and numerical analysis of fracture and crack growth in SMAs is presented. Crack extension is investigated under mode-I, isothermal, monotonic, mechanical loading in near-equiatomic nickel- titanium (NiTi) SMA compact tension (CT) specimens. Stable crack growth is observed and the associated J-R curve is evaluated along with the crack initiation toughness. Finite element analysis (FEA) with an energetics based fracture toughness criterion is also carried out and crack is assumed to extend when crack-tip energy release rate reaches the material specific critical value. Fracture toughening behavior is observed during crack growth and is mainly associated with the energy dissipated by the progressively occurring phase transformation close to the moving crack tip. A comparison between the experimental and numerical results is presented.

Paper Details

Date Published: 22 March 2018
PDF: 11 pages
Proc. SPIE 10596, Behavior and Mechanics of Multifunctional Materials and Composites XII, 1059612 (22 March 2018); doi: 10.1117/12.2300902
Show Author Affiliations
Behrouz Haghgouyan, Texas A&M Univ. (United States)
Sameer Jape, Texas A&M Univ. (United States)
Ceylan Hayrettin, Texas A&M Univ. (United States)
Theocharis Baxevanis, Univ. of Houston (United States)
Ibrahim Karaman, Texas A&M Univ. (United States)
Dimitris C. Lagoudas, Texas A&M Univ. (United States)


Published in SPIE Proceedings Vol. 10596:
Behavior and Mechanics of Multifunctional Materials and Composites XII
Hani E. Naguib, Editor(s)

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