Finite element analysis of the plane strain crack-tip mechanical fields in pseudoelastic shape memory alloys
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The plane strain mechanical fields near a stationary crack tip in a pseudoelastic shape memory alloy (SMA) are analyzed via the finite element method. The small scale transformation assumption is employed for the calculations using displacement boundary conditions on a circular region that encloses the stress-induced phase transformation zone. The constitutive law used adopts the classical rate-independent small strain flow theory for the evolution equations of both the transformation and plastic strains. Results on the size and shape of the stress-induced transformation and plastic zone formed near the stationary crack are obtained and a fracture toughness criterion based on the J-integral is discussed in view of the observed path-dependence of J. Moreover, the obtained results are discussed in relation to results for stationary cracks in conventional elasticplastic materials. 2012 IOP Publishing Ltd.
Smart Materials and Structures
author list (cited authors)
Baxevanis, T., Chemisky, Y., & Lagoudas, D. C.
complete list of authors
Baxevanis, T||Chemisky, Y||Lagoudas, DC