Table of Content

Open Access Original Research

The Effect of Rake Angle and Cutting Edge Radius on the Orthogonal Cutting Process of Ti6Al4V Alloy

Received: 23 February 2024;  Published: 18 June 2024;  doi: 10.21926/rpm.2402013

Abstract

This paper investigates the effect of rake angle, α, cutting edge radius, r, and feed rate, f, on the cutting force and cutting zone temperature during orthogonal dry cutting of Ti6Al4V. A numerical model representative of the 2D orthogonal cutting process is developed using ABAQUS/Explicit software. Johnson-Cook, (JC) constitutive material model is used to describe material plasticity. JC damage model and energy-based fracture criterion are used to describe damage initiation and evolution. Using Minitab-19 softwar [...]

29 212

Open Access Research Article

Spin Entanglement – A Unifying Principle for Superconductors and Molecular Bonding

Received: 20 December 2023;  Published: 03 June 2024;  doi: 10.21926/rpm.2402012

Abstract

The spin-statistics theorem is generalized to include quantum entanglement. Specifically, within the context of spin entanglement, we prove that isotropically spin-correlated (ISC) states must occur in pairs. This pairing process can be composed of parallel or anti-parallel states. Consequently, the article proposes using ISC states as a unifying principle to explain better Bose-Einstein condensates, the theory of superconductivity, and molecular and atomic orbitals, all of which involve a pairing process. The theo [...]

93 672

Open Access Original Research

Enhancing Thermal, Viscoelastic, and Mechanical Properties of Silicone Rubber Matrix through Reinforcements for Use as a Medical Implant

Received: 14 December 2023;  Published: 03 May 2024;  doi: 10.21926/rpm.2402011

Abstract

The use of silicone rubber as an implant is limited due to its weak properties. In this study, the impact of various reinforcements, such as TiO2 or SiO2 nanoparticles, carbon, or polypropylene fiber micro reinforcements, on the mechanical, thermal, and viscoelastic properties of silicone rubber composites with RTV-4125 matrix was investigated. The composites were evaluated through several tests, including tensile, compression, FTIR, TGA, DMTA, and water adsorption tests. It was found that the composites' tensile s [...]

221 1093

Open Access Perspective

Whisker Bond: From Findings to Concept in Refractories

Received: 12 January 2024;  Published: 12 April 2024;  doi: 10.21926/rpm.2402010

Abstract

Ceramic bonds are conventionally formed during the burning of refractory bricks and by using pre-fabricated blocks or monolithic lining, which is characterized as the coalescence of the particles by liquid sintering. However, the whisker bond was discovered with the outstanding performance of unburnt periclase–spinel–Al bricks while substituting magnesia–chrome bricks in the chromium-free campaign of refractory lining of RH degassers. Thanks to the prominent effect of the whisker bond, such a refractory material de [...]

216 1083

Open Access Review

Review on the Development of Titanium Diboride Ceramics

Received: 02 January 2024;  Published: 03 April 2024;  doi: 10.21926/rpm.2402009

Abstract

Titanium diboride (TiB2) materials have garnered significant attention due to their remarkable comprehensive properties. They offer potential applications in high-temperature structural materials, cutting tools, armor, electrodes for metal smelting, and wear-resistant parts. However, due to the low self-diffusion coefficient, the TiB2 exhibits poor sinterability, excessive grain growth at elevated temperatures, and inadequate oxidation resistance, limiting its wide application. Therefore, many research works are de [...]

310 1955

Open Access Review

A Review on Silk Fibers and Their Medical Applications

Received: 12 December 2023;  Published: 15 March 2024;  doi: 10.21926/rpm.2401008

Abstract

This mini-compilation study included the chemical structure, mechanical, thermal, and dimensional properties of silk fiber, its production process, pre-treatment, and biomedical applications from various experimental studies, which are compiled and summarized. The silk fiber should have a degumming process before using biomedical applications. The 25% concentration for Na2CO3 in ethanol solution (80%) as a coagulant chemical with a salt such as LiB2 (9 M) at a temperature of 98°C for 45 minutes at pH between 6 and [...]

195 1175

Open Access Research Article

Capillary Suction Properties of Mortar Made with Recycled Plastic Aggregates Elaborated from Waste Electrical and Electronic Equipment

Received: 18 October 2023;  Published: 15 March 2024;  doi: 10.21926/rpm.2401007

Abstract

It is possible to revalue the plastic fraction from WEEE using it as a recycled aggregate (RA) in cement mortars. However, this feasibility depends on elaborating a granular material via a core-shell strategy to stabilize the potential contaminants. The core is a plastic particle, and the shell is a cement, fillers, and activated carbon mixture. Due to the hydrophilic characteristics of the shell and the presence of interstitial sites generated by the use of the RA, it is necessary to study the wetting properties o [...]

167 1004

Open Access Review

Self-Healing Concrete Techniques and Technologies and Applications

Received: 30 April 2023;  Published: 21 February 2024;  doi: 10.21926/rpm.2401006

Abstract

The main weakest point of concrete is its exposure to cracks, and concrete structure repair is expensive, especially for infrastructure maintenance, which is difficult to access. The ability of self-healing concrete (SHC) to successfully heal fractures without the assistance of humans has received much attention since it increases operational life and lowers maintenance expenses. This paper reviews various techniques and technologies of autogenous and autonomous self-healing concrete. Much more attention is given t [...]

367 3135

Open Access Original Research

Do Magnetic Monopoles Exist?

Received: 21 October 2023;  Published: 07 February 2024;  doi: 10.21926/rpm.2401005

Abstract

In this paper, we continue our previous work by discussing the consequences of curvature in spacetime caused by the presence of mass and the implications of this. We address the question raised by Dirac regarding the impact of a magnetic monopole on the quantum world. We discuss quantization concerning the solid angles observed, which may have a connection with a magnetic monopole.

291 2373

Open Access Original Research

Elementary Collective Effects in Systems Containing Small Fermion-Numbers

Received: 14 October 2023;  Published: 06 February 2024;  doi: 10.21926/rpm.2401004

Abstract

One deals with an fermions collective where we encounter elementary emerging-collective phenomena at very low temperatures. This simplicity allows for expanding our insight on collective fermion behavior. We focus on several quantifiers, including standard ones related to thermal behavior, such as the von Neumann entropy, and quantifiers of other kinds, like the quantum mixture.

267 1330

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