by Unni Santhosh  and Jalees Ahmad

Received: 06 September 2023;  Published: 01 December 2023;  doi: 10.21926/rpm.2304035

The results of stress analysis of a ceramic matrix composite (CMC) vane using a physics-based model developed for two-dimensional woven CMCs are presented. The model considers the inherent defects and micromechanical damage in woven CMCs along with time-dependent deformation of the constituents. Predictions include damage state under general load conditions and the global deformation response of the vane. Strain-gage data from burst tests are compared to strain predictions obtained using the model. Results from tim [...]

by A. Guillermo Bracamonte

Received: 28 July 2023;  Published: 15 November 2023;  doi: 10.21926/rpm.2304034

This mini-review discussed the best-known chemical and synthetic methodologies used in the last years to modify carbon allotropes, with an interest in nanotechnology. In this perspective, chemistry with optoelectronics applications and recent trends within bio-applications focusing mainly on graphene and its derivatives were considered. So, the mini-review intended to focus on methodologies to add functional groups with varied reactivities, polymer chemistry, and nanoscale control. These methodologies provide insig [...]

by Jeffrey Allen  , Guillermo Riveros  , Ivan Beckman  and Elton Freeman

Received: 22 August 2023;  Published: 25 October 2023;  doi: 10.21926/rpm.2304033

In this work, we apply a multiphysics approach to fused deposition modeling to simulate extrusion and solidification. Restricting the work to a single line scan, we focus on the application of polylactic acid. In addition to heat, momentum and mass transfer, the solid/liquid/vapor interface is simulated using a front-tracking, level-set method. The results focus on the evolving temperature, viscosity, and volume fraction and are cast within a set of parametric studies, to include the printing and extrusion speed, a [...]

by Sujeet Kumar Thakur  and Sambasivan venkat Eswaran

Received: 17 June 2023;  Published: 01 September 2023;  doi: 10.21926/rpm.2303032

The Inert soil obtained from the Ghazipur Municipal Solid Waste landfill located in East Delhi, India has been used as the starting material for the work described in this paper. This mountain-like monster is often in the news for its bad smell, pollution of the groundwater in the area from its leachates, and the occasional fires in it endangering the lives of the people living nearby. Landfills produce many greenhouse gases (CO2, CH4, CO, HCHO, H2S, and NH3) which are poisonous and cause environmental pollution in [...]

by Zhong Hu  and Haiping Hong

Received: 21 March 2023;  Published: 16 August 2023;  doi: 10.21926/rpm.2303031

The chemically functionalized carbon nanotubes (f-CNTs) and hydrogen bonding modified polymer composites (CPCs) exhibit unique chemical, mechanical, electrical, and thermal properties and are emerging as promising materials to achieve extraordinarily high electrical and thermal conductivity, lightweight and anticorrosion, superior strength and stiffness for potential applications in the aerospace and automotive industries, energy conversion, and optical and electronic devices, therefore, attracting considerable res [...]

by Guillermo Bracamonte

Received: 26 May 2023;  Published: 04 August 2023;  doi: 10.21926/rpm.2303030

This brief letter presents this Special Issue nominated as “Hybrid Graphene-based Materials: Synthesis, Characterization, Properties, and Applications”. This intends to show and discuss the main properties of Graphene and its derivatives; and how it could be synthesized, modified and tuned for Optics, Electro-Optics, Electronics, and Quantum characteristics. In this context, the synthesis and chemical modifications were highlighted for the design of Hybrid composites, platforms. In this context, it was afforded to [...]

by Fathi M Layas  , Vail Karakale  and Ramadan E Suleiman

Received: 28 April 2023;  Published: 27 July 2023;  doi: 10.21926/rpm.2303029

In recent years, civil wars and terror activities have caused blast-loading effects on reinforced concrete buildings, resulting in catastrophic human and material damage. When a building is exposed to a blast load, a very high air pressure affects the building within a very short duration. To decide on the reconstruction or retrofit of a building exposed to blast loading, the behavior of the building under blast loading should be investigated. In this paper a case study of a RC building exposed to blast loading dur [...]

by Alireza Modir  , Arnaud Casterman  and Ibrahim Tansel

Received: 10 January 2023;  Published: 26 July 2023;  doi: 10.21926/rpm.2303028

The process of metal additive manufacturing (AM) involves creating strong, complex components by using fine metal powders. Extensive use of AM methods is expected in near future for the production of small and medium-sized batches of end-use products and tools. The ability to detect loads and defects would enable AM components to be used in critical applications and improve their value. In this study, the Surface Response to Excitation (SuRE) method was used to investigate wave propagation characteristics and load [...]

by Rayara Silva dos Santos  , Pedro Henrique Poubel Mendonça da Silveira  , Beatriz Cruz Bastos  , Marceli do Nascimento da Conceição  , Roberto Carlos da Conceição Ribeiro  and Daniele Cruz Bastos

Received: 22 May 2023;  Published: 18 July 2023;  doi: 10.21926/rpm.2303027

This article presents the development and characterization of environmentally friendly composites comprising polypropylene (PP) reinforced with Bahia Beige (BB) marble waste. The composites were prepared using different PP/BB weight ratios and analyzed for their chemical, physical, mechanical, microstructural, and thermal properties. X-ray fluorescence (XRF) analysis revealed the composition of BB, which exhibited a significant concentration of CaO, indicating the presence of calcite and other oxides. X-ray diffrac [...]

by Vardan Apinyan

Received: 30 March 2023;  Published: 24 June 2023;  doi: 10.21926/rpm.2302026

This paper considers a finite-sized two-leg ladder of spin-1/2 particles with local inter-chain Ising interaction. We include the effects of an external magnetic field by incorporating a Zeeman-type coupling between the magnetic field and the spins localized on the lattice sites. To analyze the system, we utilize the transfer-matrix formalism to calculate the partition function. We compute the magnetization for different configurations by varying the system's parameters. We observe the presence 3of spontaneous magn [...]