Journal
JOM
Volume 70, Issue 7, Pages 1154-1158Publisher
SPRINGER
DOI: 10.1007/s11837-018-2868-2
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Funding
- Center for Hierarchical Materials Design (CHiMaD) [70NANB13Hl94, 70NANB14H012]
- AFOSR
- National Science Foundation (NSF) through the NSF Graduate Research Fellowship Program (GRFP) [DGE-1324585]
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A data-driven mechanistic modeling technique is applied to a system representative of a broken-up inclusion (stringer) within drawn nickel-titanium wire or tube, e.g., as used for arterial stents. The approach uses a decomposition of the problem into a training stage and a prediction stage. It is applied to compute the fatigue crack incubation life of a microstructure of interest under high-cycle fatigue. A parametric study of a matrix-inclusion-void microstructure is conducted. The results indicate that, within the range studied, a larger void between halves of the inclusion increases fatigue life, while larger inclusion diameter reduces fatigue life.
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