Parametric Studies of Retinal Strain Distribution due to Repair Stent Using Finite Element Modelling

2016 ◽  
Author(s):  
Razvan Rusovici ◽  
Dennis Dalli ◽  
Kunal Mitra ◽  
Michael Grace ◽  
Gary Ganiban ◽  
...  
Keyword(s):  
Finite Element ◽  
Strain Distribution ◽  
Finite Element Modelling ◽  
Element Modelling ◽  
Parametric Studies

Voxel-based finite element modelling of wood elements based on spatial density and geometry data using computed tomography

Holzforschung ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Jens U. Hartig ◽  
André Bieberle ◽  
Chris Engmann ◽  
Peer Haller
Keyword(s):  
Finite Element ◽  
Material Properties ◽  
Strain Distribution ◽  
Finite Element Modelling ◽  
Element Model ◽  
Spatial Density ◽  
Stress And Strain ◽  
Element Modelling ◽  
Stress And Strain Distribution ◽  
The Finite Element Model

Abstract In this paper, voxel-based finite element modelling based on spatial geometry and density data is applied to simulate the detailed stress and strain distribution in a large wood element. As example, a moulded wooden tube with a length of 3 m and a diameter of 0.3 m is examined. Gamma-ray computed tomography is used to obtain both, its actual geometric shape and spatial density distribution. Correlation functions (R2 ≈ 0.6) between density and elastic material properties are experimentally determined and serve as link for defining the non-uniform distribution of the material properties in the finite element model. Considering the geometric imperfections and spatial variation of the material properties, a detailed analysis of the stress and strain distribution of a wood element is performed. Additionally, a non-destructive axial compression test is applied on the wooden tube to analyse the load-bearing behaviour. By means of digital image correlation, the deformation of the surface is obtained, which also serves for validation of the finite element model in terms of strain distributions.

Micro-Raman Analysis of a Micromachined 3C-SiC Cantilever

2012 ◽  
Vol 717-720 ◽  
pp. 525-528 ◽  
Author(s):  
Nicolò Piluso ◽  
R. Anzalone ◽  
Massimo Camarda ◽  
A. Severino ◽  
Giuseppe D'Arrigo ◽  
...  
Keyword(s):  
Finite Element ◽  
Stress Distribution ◽  
Thin Layer ◽  
Strain Field ◽  
Strain Distribution ◽  
Finite Element Modelling ◽  
Raman Analysis ◽  
Element Modelling ◽  
Sic Film

In this work, Raman microscopy is used to study the stress distribution on 3C-SiC cantilevers. Also we compare the strain distribution observed on the microstructure, using the shift of the transverse optical (TO) mode in micro-Raman maps, with the values predicted using a recent analytic theory [1]. Along the width of the cantilever is observed a reduction of stress ascribed to the etching processes that removes a thin layer of the interface between the 3C-SiC film and the substrate close to the edge of the microstructure. It is possible to show that this variation can be ascribed to a non-linearity of the strain field along the 3C-SiC film thickness. Also, helped by Finite Element Modelling (FEM), we determined the stress tensor along the cantilever. This result shows that, for a complete stress description of the cantilevers, it is necessary taking into account the role of diagonal and off-diagonal stress tensorial components.

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