Computational modeling of size-dependent superelasticity of shape memory alloys
نویسندگان
چکیده
منابع مشابه
Computational Modeling of Size-Dependent Superelasticity
The superelastic effect in shape memory alloys (SMAs) is attributed to the stressinduced reversible austenitic-martensitic phase transformations. It is characterized by the development of significant strains which are fully recoverable upon unloading, and also characterized by the stress-hysteresis in the loading and unloading cycle which corresponds to the energy dissipated during phase transf...
متن کاملDirect observation of hierarchical nucleation of martensite and size-dependent superelasticity in shape memory alloys.
Martensitic transformation usually creates hierarchical internal structures beyond mere change of the atomic crystal structure. Multi-stage nucleation is thus required, where nucleation (level-1) of the underlying atomic crystal lattice does not have to be immediately followed by the nucleation of higher-order superstructures (level-2 and above), such as polysynthetic laths. Using in situ trans...
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In the last two decades, there has been an increasing interest in structural engineering control methods. Shape memory alloys and seismic isolation systems are examples of passive control systems that use of any one alone, effectively improve the seismic performance of the structure. Characteristics such as large strain range without any residual deformation, high damping capacity, excellent re...
متن کاملA variational multiscale method for inelasticity: Application to superelasticity in shape memory alloys
This paper presents a variational multiscale method for developing stabilized finite element formulations for small strain inelasticity. The multiscale method arises from a decomposition of the displacement field into coarse (resolved) and fine (unresolved) scales. The resulting finite element formulation allows arbitrary combinations of interpolation functions for the displacement and the pres...
متن کاملModeling and Simulation of Shape Memory Alloys using Microplane Model
In this chapter, a three-dimensional phenomenological constitutive model for the simulation of shape memory alloys is introduced. The proposed macromechanical model is based on microplane theory. Microplane approach is chosen to have limited material parameters in that all of those are measurable by simple tests. User material subroutine is developed to implement the proposed model in a commerc...
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ژورنال
عنوان ژورنال: Journal of the Mechanics and Physics of Solids
سال: 2016
ISSN: 0022-5096
DOI: 10.1016/j.jmps.2016.01.004