期刊
SMART MATERIALS AND STRUCTURES
卷 21, 期 9, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0964-1726/21/9/094012
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资金
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [844082] Funding Source: National Science Foundation
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 elastic-plastic materials.
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