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 [...]

by Subodh K. Mital  , Steven M. Arnold  , Brett A. Bednarcyk  and Evan J. Pineda

Received: 23 January 2023;  Published: 20 June 2023;  doi: 10.21926/rpm.2302025

The behavior and response of ceramic matrix composites (CMCs), in particular silicon carbide fiber reinforced silicon carbide matrix (SiC/SiC), is affected by many factors such as variation of fiber volume fraction, residual stresses resulting from processing of the composites at high temperature, random microstructures, and the presence of matrix flaws (e.g., voids, pores, cracks etc.) as well as general material nonlinearity and heterogeneity that occurs randomly in a composite. Residual stresses arising from the [...]

by Sumita Jain  , Noufa Khan  , Yena Park  , Densen Cao  and Daniel CN Chan

Received: 02 May 2022;  Published: 15 June 2023;  doi: 10.21926/rpm.2302024

Zinc pyrithione (ZPT) is used to prevent microbial degradation and deterioration of manufacturing starting materials such as plastics, polymers, and latexes. The main objective of this study was to evaluate the anti-bacterial properties of ZPT. Currently, there is insufficient data on the effect of ZPT on viability of commonly encountered bacterial pathogens. We tested the efficacy of ZPT manufactured in the form of film rolls as an anti-bacterial protective layer by using the ASTM–recommended protocol on growth of [...]

by Hazal Turasan  , Tahrima B. Rouf  , Tuncay Yilmaz  and Jozef L. Kokini

Received: 26 October 2022;  Published: 12 June 2023;  doi: 10.21926/rpm.2302023

Nanomaterials are now used in almost every field of science; as conductors and electrodes in electronics, as nanodelivery systems in health screenings and drug delivery, as nanofibrils in filtering and textile industry, as nanoparticles in biosensor fabrication for toxin and pathogen detection, and in packaging materials in the food industry. Synthetic materials and plastics accumulate in the environment causing increasing health concerns for their use in food and pharmaceutical products. Therefore, researchers now [...]

by Eugene Adamovich  , Eugenia Buryanskaya  , Anthon Elfimov  , Irina Maklakova  , Oleg Gradov  , Margaret Gradova  and Theodor Orehov

Received: 27 December 2022;  Published: 29 May 2023;  doi: 10.21926/rpm.2302022

In this paper, starting with an introductory review of the applications of liquid crystals and polymer-dispersed liquid crystal systems in (bio)sensors and microfluidics, the possibilities of visualizing self-organization products of liquid crystalline media or field-induced instabilities of liquid crystalline systems are considered. In particular illustrated cases, it is proposed to use FemtoScan software-containing metrological complexes to visualize instabilities in liquid crystalline systems and products of sel [...]

by Abolfath Askarian Khoob  , Mohammad Javad Ramezani  and Seyed Sina Mousavi

Received: 16 June 2022;  Published: 12 May 2023;  doi: 10.21926/rpm.2302021

This study intends to determine the behavior of glass laminate aluminum-reinforced epoxy (GLARE) and glass fiber-reinforced polymer (GFRP) composites under a low-velocity impact test. Experimental tests and numerical simulations are considered for this investigation. All samples are made by the hand lay-up method. Moreover, specimens are produced with a 7075-T6 aluminium sheet with a 0.5 mm thickness, resin 3001, and E-glass fiber. The drop weight test performs the low-velocity impact at 6.7 J and 10 J impact energ [...]

by Aadharshini G  , Nisha Gupta  , Prosenjit Saha  and Pallab Bhattacharya

Received: 31 January 2023;  Published: 08 May 2023;  doi: 10.21926/rpm.2302020

Energy storage devices (ESD) including batteries, and supercapacitors are becoming progressively imperative in the transition to a renewable energy future, as they enable the integration of intermittent renewable sources into the grid and provide backup power during outages. There are already reviews available on various energy storage materials and systems. However, the challenges in the choice of suitable materials and fabrication technology are yet to establish for the commercialization of affordable and efficie [...]