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NON-LOCAL MODELING ON MACROSCOPIC DOMAIN PATTERNS IN PHASE TRANSFORMATION OF NiTi TUBES |
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| Authors: | Yongjun He Qingping Sun |
| Institution: | Department of Mechanical Engineering, The Hong Kong University of Science and Technology, Hong Kong, China |
| Abstract: | Recent experiments 1]revealed many new phenomena of the macroscopic domain patterns in the stress-induced phase transformation of a superelastic polycrystalline NiTi tube during tensile loading.The new phenomena include deformation instability with the formation of a helical domain,domain topology transition from helix to cylinder,domain-front branching and loading-path dependence of domain patterns.In this paper,we model the polycrystal as an elastic continuum with nonconvex strain energy 2]and adopt the... |
| Keywords: | martensitic phase transition macroscopic domain patterns NiTi polycrystalline tubes non-local and nonconvex elasticity tube-wall thickness effect metastability and instability |
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