Continuum Modeling on Macroscopic Domain Patterns during Stress Induced Phase Transition in NiTi Tubes

Yong Jun He; Qing Ping Sun

doi:10.4028/www.scientific.net/AMR.47-50.964

Paper Titles

Wetting and Adhesion Behavior of Undulated a-C:H Film Deposited on Nano-Scale Copper Dot
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Study of Nanometer Al₂O₃ Composite Electroless Deposit Strengthened by Different Laser Power
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A Novel Method to Synthesize Nanocrystalline Calcium Phosphates
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Porous Ceramics for High Temperature Filters
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Continuum Modeling on Macroscopic Domain Patterns during Stress Induced Phase Transition in NiTi Tubes
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Preventing Metal Structure from Water-Seepage by Organic Sealants Comparing Research
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Study on the Dielectric Properties of Hybrid and Porous Polyimide-Silica Films
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Preparation and Characterization of Functional Geopolymer
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Preparation of CF/BR Composite Used for Electromagnetic Shielding
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Continuum Modeling on Macroscopic Domain Patterns during Stress Induced Phase Transition in NiTi Tubes

Abstract:

Recent experiment [1] revealed many new characteristics of the domain patterns in a superelastic polycrystalline NiTi tube during tensile loading, such as domain wall instability and branching, dynamic topology transition of domain patterns. In this paper, we use the continuum mechanics approach and model the polycrystal as a phase-transformable continuum described by non-local nonlinear elasticity [2]. We simulate the equilibrium macroscopic domain patterns and their evolution in the tubes under tensile loading by the nonlocal Finite Element Method (FEM). It is revealed that the loading path dependence and dynamic topology transition of domain patterns are mainly due to thermodynamic metastability of the tube system. Our simulations capture all the key features of the domain patterns observed in the NiTi polycrystalline tubes.