The role of radiation in melt stability in zone-melt recrystallization of SOI

1990 ◽  
Vol 5 (5) ◽  
pp. 998-1002 ◽  
Author(s):  
J.A. Knapp ◽  
L.R. Thompson ◽  
G.J. Collins
Keyword(s):  
Finite Element ◽  
Radiative Heat ◽  
Computational Simulation ◽  
Beam Line ◽  
Coupled Systems ◽  
Process Window ◽  
Radiative Heat Loss ◽  
Heating Uniformity ◽  
Zone Melt

Under circumstances in Zone-Melt-Recrystallization (ZMR) of Si-on-Insulator (SOI) structures where radiative heat loss is significant, the ∼50% decrease in emissivity when Si melts destabilizes the Si molten zone. We have demonstrated this both experimentally using a slowly scanned e-beam line source and numerically with a finite-element computational simulation. The resulting instability narrows the process window and tightens requirements on beam control and background heating uniformity, both for e-beam ZMR systems and optically-coupled systems such as a graphite strip heater.

scholarly journals 3D Finite Element Technology and Its use in Craniofacial Injuries

2014 ◽  
Vol 5 (4) ◽  
pp. 223-228
Author(s):  
HP Raghuveer ◽  
NT Prashanth ◽  
Vinod Rangan ◽  
ES Shobha ◽  
Suresh Nagesh ◽  
...  
Keyword(s):  
Finite Element ◽  
Computational Simulation ◽  
High Fidelity ◽  
Craniofacial Skeleton ◽  
Element Analysis ◽  
3D Finite Element ◽  
Human Skull ◽  
Finite Element Technology ◽  
Craniofacial Trauma

ABSTRACT Quite a bit of interest and evolution has happened in the field of research in the recent times toward analyzing and understanding of trauma and injuries especially that on the human skull and related organs. With the development of faster and latest computers, high fidelity human models have been created to understand the biomechanics of these structures to trauma. In the present article a broad methodology of the fundamentals of model creation and analysis and fracture mechanics has been presented. In particular this paper highlights the methodology of 3D simulation of craniofacial region and an insight to the role of FEA (Finite Element Analysis) in craniofacial trauma. The paper also explains the various steps in computational simulation of the craniofacial skeleton. How to cite this article Shobha ES, Raghuveer HP, Nagesh S, Rayapati DK, Prashanth NT, Rangan V. 3D Finite Element Technology and Its use in Craniofacial Injuries. World J Dent 2014;5(4):223-228.

THE ROLE OF FINITE ELEMENT METHOD IN CIVIL ENGINEERING

2018 ◽  
Vol 5 (02) ◽  
Author(s):  
Er. Hardik Dhull
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Approximate Solution ◽  
Analytical Method ◽  
Civil Engineering ◽  
The Finite Element Method ◽  
Engineering Problems ◽  
Building Components ◽  
Element Method

The finite element method is a numerical method that is used to find solution of mathematical and engineering problems. It basically deals with partial differential equations. It is very complex for civil engineers to study various structures by using analytical method,so they prefer finite element methods over the analytical methods. As it is an approximate solution, therefore several limitationsare associated in the applicationsin civil engineering due to misinterpretationof analyst. Hence, the main aim of the paper is to study the finite element method in details along with the benefits and limitations of using this method in analysis of building components like beams, frames, trusses, slabs etc.

scholarly journals A Finite Element Approach to the Analysis of Rotating Bladed-Disk Assemblies Coupled With Flexible Shaft

1994 ◽  
Author(s):  
Wen Zhang ◽  
Wenliang Wang ◽  
Hao Wang ◽  
Jiong Tang
Keyword(s):  
Finite Element ◽  
Degrees Of Freedom ◽  
Coupled System ◽  
Equation Of Motion ◽  
Coupled Systems ◽  
The Finite Element Method ◽  
Bladed Disk ◽  
Modal Synthesis ◽  
Element Approach ◽  
Final Equation

A method for dynamic analysis of flexible bladed-disk/shaft coupled systems is presented in this paper. Being independant substructures first, the rigid-disk/shaft and each of the bladed-disk assemblies are analyzed separately in a centrifugal force field by means of the finite element method. Then through a modal synthesis approach the equation of motion for the integral system is derived. In the vibration analysis of the rotating bladed-disk substructure, the geometrically nonlinear deformation is taken into account and the rotationally periodic symmetry is utilized to condense the degrees of freedom into one sector. The final equation of motion for the coupled system involves the degrees of freedom of the shaft and those of only one sector of each of the bladed-disks, thereby reducing the computer storage. Some computational and experimental results are given.

Radiative Heat Loss Estimation of Building Envelopes based on 3D Thermographic Models Utilizing Small Unmanned Aerial Systems (sUAS)

2021 ◽  
pp. 110957
Author(s):  
Mark Leggiero ◽  
Bradley Andrew ◽  
Ryan Elliott ◽  
John Indergaard ◽  
JB Sharma ◽  
...  
Keyword(s):  
Heat Loss ◽  
Radiative Heat ◽  
Loss Estimation ◽  
Unmanned Aerial Systems ◽  
Radiative Heat Loss ◽  
Building Envelopes ◽  
Aerial Systems

scholarly journals An Extended Finite Element Method (XFEM) Study on the Elastic T-Stress Evaluations for a Notch in a Pipe Steel Exposed to Internal Pressure

Mathematics ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 507
Author(s):  
K. Yakoubi ◽  
S. Montassir ◽  
Hassane Moustabchir ◽  
A. Elkhalfi ◽  
Catalin Iulian Pruncu ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Internal Pressure ◽  
Extended Finite Element Method ◽  
Research Study ◽  
Extended Finite Element ◽  
T Stress ◽  
Cracked Structures ◽  
Element Method

The work investigates the importance of the K-T approach in the modelling of pressure cracked structures. T-stress is the constant in the second term of the Williams expression; it is often negligible, but recent literature has shown that there are cases where T-stress plays the role of opening the crack, also T-stress improves elastic modeling at the point of crack. In this research study, the most important effects of the T-stress are collected and analyzed. A numerical analysis was carried out by the extended finite element method (X-FEM) to analyze T-stress in an arc with external notch under internal pressure. The different stress method (SDM) is employed to calculate T-stress. Moreover, the influence of the geometry of the notch on the biaxiality is also examined. The biaxiality gave us a view on the initiation of the crack. The results are extended with a comparison to previous literature to validate the promising investigations.

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