On the Deformation Analysis during RCSR Process Aided by Finite Element Modeling and Digital Image Correlation

2016 ◽  
Vol 18 (8) ◽  
pp. 1434-1443 ◽  
Author(s):  
Saeideh Mirab ◽  
Mahmoud Nili-Ahmadabadi ◽  
Ali Khajezade ◽  
Mohamad Abshirini ◽  
Mohammad Habibi Parsa ◽  
...  
Keyword(s):  
Finite Element ◽  
Digital Image Correlation ◽  
Finite Element Modeling ◽  
Digital Image ◽  
Image Correlation ◽  
Deformation Analysis ◽  
Element Modeling

Hybrid Digital Image Correlation–Finite Element Modeling Approach for Modeling of Orthogonal Cutting Process

2018 ◽  
Vol 140 (4) ◽  
Author(s):  
Dong Zhang ◽  
Xiao-Ming Zhang ◽  
Han Ding
Keyword(s):  
Finite Element ◽  
Velocity Field ◽  
Digital Image Correlation ◽  
Finite Element Modeling ◽  
Digital Image ◽  
Equilibrium Equation ◽  
Cutting Process ◽  
Image Correlation ◽  
Stress Fields ◽  
Element Modeling

Cutting process modeling is still a significant challenge due to the severe plastic deformation of the workpiece and intense friction between the workpiece and tool. Nowadays, a novel experimental approach based on digital image correlation (DIC) technique has been utilized to study the severe deformation of the workpiece. However, the experimentally measured velocity field does not necessarily satisfy the equilibrium equation that is one of the fundamental governing equations in solid mechanics due to the measurement errors; hence, accurate stress fields could hardly be derived. In this paper, we propose a hybrid DIC-FEM approach to optimize the velocity field and generate a stress field that is in an equilibrium state. First, the analysis region for finite element modeling (FEM) is selected according to the captured image, and the DIC results are used to track the deformation history of the material points. Secondly, the deviatoric stresses of the analysis region are calculated by employing the plastic theory. Thirdly, the hydrostatic pressures are acquired through solving over-constrained equations derived through FEM. Finally, the velocity field is optimized to satisfy the equilibrium equation and the boundary conditions (BCs) with the DIC results serving as an initial value of the workpiece velocity field. To validate this approach, the deformations including the velocity and strain yielded by the hybrid method are compared with the DIC results. The stress fields are presented to demonstrate the satisfaction of the equilibrium equation and the BCs. Moreover, cutting forces calculated through the integration of the stress tensors are compared against the FEM simulations and the experimental measurement.

scholarly journals Deformation and failure of PrintCast A356/316 L composites: Digital image correlation and finite element modeling

2020 ◽  
Vol 195 ◽  
pp. 109061
Author(s):  
Jiahao Cheng ◽  
Maxim Gussev ◽  
Jason Allen ◽  
Xiaohua Hu ◽  
Abdel R. Moustafa ◽  
...  
Keyword(s):  
Finite Element ◽  
Digital Image Correlation ◽  
Finite Element Modeling ◽  
Digital Image ◽  
Image Correlation ◽  
Deformation And Failure ◽  
Element Modeling
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