scholarly journals Multilayer CdHgTe-based infrared detector: 2D/3D microtomography, synchrotron emission and finite element modelling with stress distribution at room temperature and 100 K

Materialia ◽  
2020 ◽  
Vol 9 ◽  
pp. 100511
Author(s):  
A.L. Lebaudy ◽  
R. Pesci ◽  
B. Piotrowski
Keyword(s):  
Finite Element ◽  
Stress Distribution ◽  
Finite Element Modelling ◽  
Room Temperature ◽  
Infrared Detector ◽  
Synchrotron Emission ◽  
Element Modelling

A Finite Element Modelling of Embrittlement in Composite Liquid Phase Sintered Heavy Alloys

1986 ◽  
Vol 108 (2) ◽  
pp. 159-162 ◽  
Author(s):  
D. Rittel ◽  
I. Roman ◽  
M. Bercovier
Keyword(s):  
Finite Element ◽  
Liquid Phase ◽  
Thermal Cycle ◽  
Finite Element Modelling ◽  
Room Temperature ◽  
Element Modelling ◽  
Room Temperature Ductility ◽  
Heavy Alloys ◽  
Finite Element Procedure ◽  
Sintered Alloys

Sintered tungsten base heavy alloys made of tungsten grains embedded in a nickel rich matrix can possess low room temperature ductility that may be improved by subsequent heat treatment. The sintering thermal cycle was simulated by a finite element procedure, and it was found that the vast differences in thermal and elastic properties of the microstructural components result in significant residual interfacial strains upon cooling to ambient temperature. These strains may contribute significantly to the low room temperature ductility of this class of liquid phase sintered alloys and should be relieved in order to improve ductility.

Finite-element modelling of two-disc shrink fit assembly and an evaluation of material pairs of discs

2010 ◽  
Vol 225 (2) ◽  
pp. 263-273 ◽  
Author(s):  
F Ozturk
Keyword(s):  
Finite Element ◽  
Stress Distribution ◽  
Finite Element Modelling ◽  
The Finite Element Method ◽  
Uniform Stress ◽  
Element Modelling ◽  
Hollow Shaft ◽  
Complex Shapes ◽  
Shrink Fit ◽  
Good Agreement

In this study, a two-disc shrink fit assembly was modelled in two dimension using ABAQUS/Standard to determine the interfacial pressures with respect to the interferences. Steel—steel and steel—aluminium material pairs were considered. Inner disc of the assembly was considered as hollow and solid shafts, respectively. The results indicate that the finite-element results were in good agreement with the analytical results. In the hollow shaft assembly, both the hollow shaft and the outer disc had non-uniform stress distribution. In the solid shaft assembly, uniform stress distribution for the solid shaft and non-uniform stress distribution for the outer disc were determined. It was pointed out that same pressure can be obtained by different interference with different material pairs. If the assembly has complex shapes, the finite-element method gives more comprehensive and accurate results than the analytical method.

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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