TY - GEN
T1 - Continuum modeling on macroscopic domain patterns during stress induced phase transition in NiTi tubes
AU - He, Yongjun
AU - Sun, Qingping
PY - 2008/1/1
Y1 - 2008/1/1
N2 - 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.
AB - 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.
KW - Domain wall energy
KW - Finite element method
KW - Macroscopic domain patterns
KW - Martensitic phase transition
KW - Metastability
KW - NiTi polycrystalline tubes
KW - Non-local and nonlinear elasticity
U2 - 10.4028/www.scientific.net/amr.47-50.964
DO - 10.4028/www.scientific.net/amr.47-50.964
M3 - Conference contribution
AN - SCOPUS:56349159990
SN - 0878493786
SN - 9780878493784
T3 - Advanced Materials Research
SP - 964
EP - 967
BT - Multi-functional Materials and Structures - International Conference on Multifunctional Materials and Structures
PB - Trans Tech Publications
T2 - Multi-functional Materials and Structures - International Conference on Multifunctional Materials and Structures
Y2 - 28 July 2008 through 31 July 2008
ER -