|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||Thermomechanical Characterization of Shape Memory Alloy Mode I Fracture
||William LePage, John Shaw, Samantha Daly
|On-Site Speaker (Planned)
This work characterizes the thermomechanical behavior of NiTi shape memory alloy (SMA) during quasistatic mode I fracture by using a combination of IR thermography and 3D-DIC. NiTi fracture has become increasingly relevant as SMA devices grow in size and extend into critical applications such as aerospace structures. Previous experimental work has characterized NiTi fracture behavior with a variety of techniques, but there is limited experimental work probing the temperature-dependent mechanical responses of NiTi during fracture. To thoroughly validate recent analytical and numerical models for NiTi fracture, more experimental characterization is warranted. The complex thermomechanical interactions of the local phase transformation induced by high stresses at the crack tip, and their impact on the observed fracture behavior, are discussed. Furthermore, novel experimental developments such as the J- and I-integral measurements on full-field measurements of phase transformation in SMAs, and cross-polarization for enhanced DIC fidelity, are introduced.
||Planned: A print-only volume