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Full field displacement measurements of notched pseudoelastic specimens Misure a pieno campo degli spostamenti in prossimità di intagli in leghe pseudoelastiche
Last modified: 2013-06-27
Abstract
Nickel-Titanium (NiTi) based shape memory alloys exhibit phase transition mechanisms and,
consequently, common theories on mechanics of materials cannot be directly applied. Furthermore, local
transformations near geometric discontinuities significantly affect crack formation and propagation
mechanisms, under both static and cyclic loading conditions. A full field displacement measurement technique
have been used in this investigation, which is based on the Digital Image Correlation (DIC) method, to analyze
notched NiTi specimens. In particular, Single Edge Notch (SEN) specimens, obtained from a commercial
pseudoelastic NiTi sheet, have been investigated. The localized stress-induced phase transformation
mechanisms near the notch root have been analysed.
consequently, common theories on mechanics of materials cannot be directly applied. Furthermore, local
transformations near geometric discontinuities significantly affect crack formation and propagation
mechanisms, under both static and cyclic loading conditions. A full field displacement measurement technique
have been used in this investigation, which is based on the Digital Image Correlation (DIC) method, to analyze
notched NiTi specimens. In particular, Single Edge Notch (SEN) specimens, obtained from a commercial
pseudoelastic NiTi sheet, have been investigated. The localized stress-induced phase transformation
mechanisms near the notch root have been analysed.
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