Finite element analysis of coupled phase-field and thermoelasticity equations at large strains for martensitic phase transformations based on implicit and explicit time discretization schemes

2021 ◽  
pp. 1-17
Author(s):  
Hossein Rahbar ◽  
Mahdi Javanbakht ◽  
Saeed Ziaei-Rad ◽  
Alessandro Reali ◽  
Hossein Jafarzadeh
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Phase Transformations ◽  
Phase Field ◽  
Time Discretization ◽  
Large Strains ◽  
Element Analysis ◽  
Discretization Schemes ◽  
Martensitic Phase Transformations ◽  
Implicit And Explicit

Investigation of Strain Hardening in NiAl Single Crystals Using Three-Dimensional FEA Models

1999 ◽  
Vol 123 (1) ◽  
pp. 20-27 ◽  
Author(s):  
Chulho Yang ◽  
Ashok V. Kumar
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Strain Hardening ◽  
Single Crystals ◽  
Three Dimensional ◽  
High Rate ◽  
Large Strains ◽  
Slip Systems ◽  
Element Analysis ◽  
Hardening Model

Single crystals of NiAl are very ductile at intermediate temperatures (400–700 K) and were observed to exhibit high strain hardening rates at large strains when loaded in the [110] orientation. The experimentally observed strain hardening in NiAl single crystals could not be predicted using simple hardening models and two-dimensional finite element analysis. The primary slip systems that activate during the deformation are (010)[100] and (100)[100], however, it has been hypothesized that activation of secondary slip on {011} slip planes may be responsible for the high rate of hardening observed. The hardening of intermetallic single crystals when multiple slip systems are activated is not well understood. To study this further, a three-dimensional hardening model and constitutive equations were implemented into a finite element analysis program. Since the parameters required to describe the hardening model such as latent hardening ratios are difficult to obtain experimentally, a parametric study was conducted to estimate values for these parameters that enable the prediction of the experimentally observed load versus elongation curves.

scholarly journals Contribution to the Modelling of the Tribological Surface Transformations

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
G. Antoni
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Phase Transformations ◽  
Structural Changes ◽  
Solid Phase ◽  
Thermomechanical Model ◽  
Element Analysis ◽  
Loaded Area

When solids are subjected to tribological loads, structural changes can occur both at the surface and in depth, immediately below the loaded area; in the case of some materials, especially metals, these changes are known as solid-solid phase transformations or Tribological Surface Transformations (TSTs). A thermomechanical model is presented in the present study in order to describe these TSTs. The ability of the model to take account TSTs is assessed with a 2D finite element analysis.

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