An Improved Constitutive Model of Shape Memory Alloy
نویسندگان
چکیده
منابع مشابه
A Thermodynamical Constitutive Model for Shape Memory Materials. Part I. the Monolithic Shape Memory Alloy
Pseudoelasticity and the shape memory e ect (SME) due to martensitic transformation and reorientation of polycrystalline shape memory alloy (SMA) materials are modelled using a free energy function and a dissipation potential. Three di erent cases are considered, based on the number of internal state variables in the free energy: (1) Austenite plus a variable number of martensite variants; (2) ...
متن کاملExplicit finite element implementation of an improved three dimensional constitutive model for shape memory alloys
This article documents a new implementation of a three dimensional constitutive model that describes evolution of elastic and transformation strains during thermo-mechanical shape memory alloy loading events assuming a symmetric, isotropic material response. In achieving this implementation, improvements were made to the original formulation of the constitutive model. These improvements allow f...
متن کاملNumerical implementation of a shape memory alloy thermomechanical constitutive model using return mapping algorithms
Previous studies by the authors and their co-workers show that the structure of equations representing shape Memory Alloy (SMA) constitutive behaviour can be very similar to those of rate-independent plasticity models. For example, the Boyd–Lagoudas polynomial hardening model has a stress-elastic strain constitutive relation that includes the transformation strain as an internal state variable,...
متن کاملThermo-mechanical behavior of shape memory alloy made stent- graft by multi-plane model
Constitutive law for shape-memory alloys subjected to multi-axial loading, which is based on a semi-micromechanical integrated multi-plane model capable of internal mechanism observations, is generally not available in the literature. The presented numerical results show significant variations in the mechanical response along the multi loading axes. These are attributed to changes in the marten...
متن کاملSEISMIC OPTIMIZATION OF STEEL SHEAR WALL USING SHAPE MEMORY ALLOY
Nowadays, steel shear walls are used as efficient lateral-load-resistant systems due to their high lateral stiffness and carrying capacity. In this paper, the effect of substituting a shape memory alloy (SMA) material is investigated instead of using conventional steel in the shear wall. A numerical study is conducted using finite element method (FEM) by OpenSees software. For this purpose, at ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Transactions of Materials Processing
سال: 2011
ISSN: 1225-696X
DOI: 10.5228/kstp.2011.20.5.350