Assessment of Radial Displacements in Rotating Disc of Uniform Thickness Made of Functionally Graded Material: A Comparative Quantitative Study | Chapter 8 | Science and Technology - Recent Updates and Future Prospects Vol. 8

 

For the calculation of a rotating disc, having a uniform thickness, made of functionally graded materials, the finite element method is used based on the concepts of multilayer disc and equivalent material. These concepts are available for analytical calculus as well. The multi-layered disc concept considers the disc made of several layers, and the equivalent material concept considers the disc material made of homogeneous and isotropic material. This material has fictitious properties that ensure the same behavior as that of the functionally graded material. The influence of Poisson's ratio can be determined and it is illustrated by some comparative results. The development of the calculus, the validation of the models and the analysis of the results are based on the numerical calculus using the finite element method. The models used, are based on the existence of the axial-symmetric plane. So, we can use 2D or 3D simplified models, with several variants regarding the fineness of the mesh. The results of the study, the models and concepts used are useful to specialists and designers of structures of this type, they have a high degree of generality and present openings for the use of other calculation methods.

 

Author(s) Details

Vasile Nastasescu

Military Technical Academy “Ferdinand I”, Romania.

Antonela Toma

National University of Sicence and Technology Politehnica Bucharest, Romania.

 

Please see the link:- https://doi.org/10.9734/bpi/strufp/v8/1244

An Introduction to Electrochemical Discharge Machining (ECDM) Process and Its Research Potentials | Chapter 1 | Theory and Applications of Engineering Research Vol. 5

To machine "difficult-to-cut" materials including ceramics, glass, and silicon wafers, a hybrid and widely recognized process known as electrochemical discharge machining (ECDM) is used. It employs the working principle of electrochemical machining (ECM) and electric-discharge machining (EDM) processes to remove the material by combining chemical etching with thermal melting. The materials machined using ECDM exhibits enormous implementations in the field of MEMS and lab-on-chip. Different facets of the ECDM process have been researched in an effort to escalate its effectiveness ever since it was originally shown. The present chapter discusses the critical research potentials of the ECDM process that was documented in the past decades. Additionally, it covers the impact of several input process factors, including electrical, electrolyte, and tool electrode, on ECDM performance. A summarized report on ECDM hybridization, and variants are also given in a lucid manner. It also identifies future directions that might enhance the ECDM process's overall machining performance. It is concluded that with the help of gas film dynamics controlled by variables such as electrolyte characteristics and tool motions, ECDM can machine non-conductive materials with precision. Pulsed voltage, suggested electrolytes (NaOH, KOH), and regulated tool properties (material, shape, and rotation) are important factors. Spherical tool electrodes help minimize overcut and taper comparative to other tools while machining depth and geometrical accuracies can be further improved by implementing hybridization such as magnetic assistance & ultrasonic assistance.

Author(s) Details:

Sahil Grover,
Mechanical Engineering Department, Punjab Engineering College, Chandigarh, India.

Viveksheel Rajput,
Mechanical Engineering Department, Punjab Engineering College, Chandigarh, India.

Vikas Yadav,
Mechanical Engineering Department, Punjab Engineering College, Chandigarh, India.

Sanjay Kumar Mangal,
Mechanical Engineering Department, Punjab Engineering College, Chandigarh, India.

Sarbjit Singh,
Mechanical Engineering Department, Punjab Engineering College, Chandigarh, India.

Sanjeev Kumar,
Mechanical Engineering Department, Punjab Engineering College, Chandigarh, India.

Please see the link here: https://stm.bookpi.org/TAER-V5/article/view/13292

Numerical and Experimental Analysis of Scoliosis Brace | Chapter 4 | Research Highlights in Science and Technology Vol. 9

The main purpose of whole was to acknowledge the working blueprint of the structure of a brace and before to identify the potential of optimization of the orthosis explanation. This chapter presents the results of mathematical simulations of the Boston-type orthosis using the definite element means (FEM) in the Ansys Workbench environment. Scoliosis is a dispassionate condition marked generally by a lateral bend of the spine. Moderate cases of adolescent emergent scoliosis (AIS) are typically medicated through conservative methods which try to instinctively correct scoliosis during the development of the patients. A ordinary conservative treatment search out use orthotic brace structure. The lines model was developed established the results of digitisation performed by way of a three-dimensional (3D) ocular scanner. A test signify measurement of the brace’s field of displacements, utilising a ray of light electronic dot pattern interferometer (ESPI), was used to experimentally confirm the FEM model. Particular focus was placed on administering the loads and boundary environments employed in the mathematical calculations all along the experimental experiment. As a result, there was a relative dissimilarity of 0.6% or so between the center displacements of orthoses as supposed experimentally and numerically. Taking an approach in the management defined thus, a conventional reasoning method of the FEM posing results output was secondhand, consisting of the forecast of the von Mises stress distribution at loads equal so that the magnitude of the accepted correction loads, set in accordance with an elementary “three-point structure”. The experimentally confirmed FEM model was used to determine extrasensory perception flow lines characteristic of the brace, indicating the common working arrangement of the brace’s structure. The main parts of the orthoses were discovered, in addition to the loads they carried for straightening the backbone and the locations of spots that necessary little effort to take part in the orthoses' principal therapeutic function. The consequences enable the plan of strategies for machinelike optimization of the brace's design.

Author(s) Details:

Slawomir Grycuk,
Doctoral School of Bialystok University of Technology, Wiejska 45A, 15-351 Bialystok, Poland.

Piotr Mrozek,
Faculty of Mechanical Engineering, Institute of Biomedical Engineering, Bialystok University of Technology, Wiejska 45C, 15-351 Bialystok, Poland.

Please see the link here: https://stm.bookpi.org/RHST-V9/article/view/11634

Determination of Finite Element Analysis of Chip Formation using ALE Method | Chapter 10 | Recent Trends in Chemical and Material Sciences Vol.7

 Many recent FEM investigations on the formulation of plain isotropic metal plates have been undertaken. In terms of structural safety and system stability, stress analysis is critical. For designing and manufacturing high-quality items, stress and distortion estimate is particularly useful. Residual stress and plastic strain dictate a structure's fatigue life in most cases, but they also play a role in design and material selection. A crack forms as the size of the load increases, reducing the work load and residual stress, and thereby reducing metal damage. The manufacturing process is an important factor in the process and the formation of any system. Complex things like hot development, material characteristics, and other predictions based on plastic strain and residual stress transition are involved in machining operations. The complexity of the finite element research is influenced by the decrease of residual stress. The focus of this research is on manufacturing techniques with lower residual stress and strain. For the simulation of metal removal processes, an arbitrary LagrangianEulerian (ALE) formulation has been devised in this article. The results show that by employing the ALE method in machining, we may minimise the strain on the work piece and hence increase its life type. Cutting tool wear and efficiency are also investigated because they are an important machine component in fabrication technology. The ABAQUS platform was used to solve the machining operation.

Author(s) Details:

Jayaprakash Venugopal,
School of Mechanical, Sathyabama Institute of Science and Technology, Chennai, India.


Anish Mariadhas,
School of Mechanical, Sathyabama Institute of Science and Technology, Chennai, India.

Please see the link here: https://stm.bookpi.org/RTCAMS-V7/article/view/6103

Management of Cracks and Defects in Mechanical Components | Chapter 6 | Current Approaches in Science and Technology Research Vol. 10

The methods for analysing structural health monitoring of structural components are discussed in this chapter. This is a problem that affects not just the aeronautical and aerospace industries, but also the industrial machines and automobile industries. The mathematical models and experimental methodologies will be discussed, although not in great detail. It will be discussed how to use Finite Element Modeling (FEM), strain gauges, and replica method techniques.

Author (s) Details

Sergio Baragetti
Department of Management, Information and Production Engineering, University of Bergamo Viale Marconi 5, 24044 Dalmine (BG), Italy.

View Book :- https://stm.bookpi.org/CASTR-V10/article/view/2336

A Review of the Channel Modeling Characteristics and Techniques for Body Area Network | Chapter 4 | Current Approaches in Science and Technology Research Vol. 6

 Human voxel phantom communications are currently being fielded for wireless body area networks (WBAN). The channel's flexibility and characteristics are determined by the required environments and body situations. There are numerous challenges to using sensors to the patient for telecom techniques during simulation, such as the position of antennas on the body surface and inside the human. It leads to system inaccuracies and uncertainty. There are several numerical solutions that are useful for use in wireless body networks and simulation modeling. This paper's synopsis is based on esoteric research into the techniques used for the WBA communication channel. Routing classification, wireless technologies, benefits and drawbacks of the most popular application techniques are demonstrated and compared.

Author (s) Details

Ahmed Mohammed Q. AL-Asadi
Electrical Engineering Technical College, Middle Technical University Bagdad, Iraq.

Ahmed Ghanim Wadday
Engineering Technical College/Najaf Al-Furat Al Awsat Technical University Najaf, Iraq

View Book :- https://stm.bookpi.org/CASTR-V6/article/view/1717