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Related Experiment Videos

Experimental and numerical data for transformation propagation in NiTi shape memory structures.

Bashir S Shariat1, Sam Bakhtiari1, Hong Yang1

  • 1Laboratory for Functional Materials, Department of Mechanical Engineering, The University of Western Australia, Australia.

Data in Brief
|December 5, 2019
PubMed
Summary
This summary is machine-generated.

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This study investigates stress-induced martensitic transformation in Nickel-Titanium (NiTi) structures. Experimental and computational data reveal how geometric variations influence transformation propagation under tensile loading.

Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Solid Mechanics

Background:

  • Shape memory alloys (SMAs) like Nickel-Titanium (NiTi) exhibit unique transformation properties.
  • Understanding stress-induced martensitic transformation is crucial for SMA applications.
  • Geometric heterogeneity can significantly impact material behavior.

Purpose of the Study:

  • To experimentally and numerically investigate the propagation of stress-induced martensitic transformation in NiTi structures.
  • To analyze the effect of uniform and nonuniform geometries on transformation evolution.
  • To correlate thermal imaging data with finite element modeling results.

Main Methods:

  • Experimental analysis using high-resolution infrared thermography during tensile loading.
Keywords:
Functionally graded materialMartensitic transformationNiTiShape memory alloys

Related Experiment Videos

  • Numerical modeling employing the finite element method to simulate transformation and deformation.
  • Investigation of NiTi structures with both uniform and geometrically graded designs.

    • Main Results:

    • Detailed experimental data on heterogeneous transformation evolutions in graded NiTi structures.
    • Numerical simulation results capturing the transformation and deformation behaviors.
    • Correlation between observed thermal patterns and predicted transformation fronts.

    Conclusions:

    • Geometric grading influences the propagation pathways of martensitic transformation in NiTi.
    • The combination of infrared thermography and finite element analysis provides a robust approach to study SMA behavior.
    • This research contributes to the predictive modeling of NiTi components under mechanical stress.