Article
Engineering, Mechanical
S. Dondeti, H. V. Tippur
Summary: Dynamic mixed-mode fracture of soda-lime glass (SLG) was investigated using Digital Gradient Sensing (DGS) and ultrahigh-speed photography. The fracture envelope for SLG, encompassing various mode-mixities, was developed for the first time and compared with prevailing approaches. The critical effective stress intensity factors for SLG show a decreasing trend as mode-II conditions become dominant.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
Article
Materials Science, Ceramics
Nisha Sheth, Carl Greenley, Raul Bermejo, John C. Mauro, Carlo G. Pantano, Seong H. Kim
Summary: Water or acid soaking surface treatments have been shown to increase the mechanical strength of soda-lime silicate (SLS) glasses, especially in humid environments where acid-leached surfaces exhibit higher failure stress. This indicates that acid-leached surface chemistry can play a role in lowering the transport kinetics of water molecules to critical flaws.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Rita Slilaty Pipes, James E. Shelby
Summary: The glass formation region has been determined for the soda lime germanate system, which includes both homogeneous and phase separated glasses. The homogeneous glasses exhibit behavior typical of the germanate anomaly, while the phase separated glasses' properties can be explained by considering the effect of morphology.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Ceramics
W. Porter Weeks, Katharine M. Flores
Summary: Vickers indentation methods are popular for determining hardness, fracture toughness, and crack initiation resistance in silicate glasses due to their simplicity and efficiency. However, obtaining consistent and repeatable results from these measurements is challenging. In this study, we investigated the effects of applied load, dwell time, and post-indentation observation time on the precision of hardness and fracture toughness values for soda-lime silicate glass measured via Vickers microindentation. The results show that low applied loads and short dwell times result in low precision, while longer dwell times lead to higher precision and load-independent fracture toughness. These findings suggest that Vickers microindentation could be a reliable technique for measuring mechanical properties of silicate glass.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Ceramics
Yonglong Lai, Fenglin Gu, Jiaxin Yu, Hongtu He
Summary: The Vickers hardness (HV) and indentation fracture toughness (KIC) of SLS glass were studied under different environmental conditions. The results show that the HV and KIC of SLS glass are affected by water-induced hydrolysis and densification ratio in different solutions. The dissolution of densified region in high pH conditions and lower crack propagation rate in low pH conditions contribute to the slight difference in KIC in extreme conditions.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
Shengzhi Tan, Shuchang Long, Xiaohu Yao, Xiaoqing Zhang
Summary: The study presents a macro material constitutive model for describing the response of inorganic glass under impact conditions, and validates the improved model's accuracy and efficiency in predicting glass responses at various loading conditions through experiments and modeling methods.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Engineering, Mechanical
Lingyue Ma, Mostafa Mollaali, Roberto Dugnani
Summary: This study proposes two distinct approaches to predict the formation of the mirror-mist boundary in soda-lime glass. The crack-front's speed reaching a critical threshold is found to be the key factor in the formation of the "mist". Additionally, the thickness of the damaged zone predicted by phase-field can also be correlated to the formation of the fractographic features. The results obtained from these two methods are in good agreement with experimental observations.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
Article
Mechanics
S. Dondeti, H. Tippur
Summary: This study combines Digital Gradient Sensing (DGS) with ultra-high-speed photography to quantitatively measure fracture parameters at different stages of crack growth in SLG, revealing crack branching precursors. Additionally, high-resolution post-mortem examination successfully quantifies fracture surface roughness and other features, corroborating with optically measured quantities.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Materials Science, Ceramics
Lei Liu, Kenji Shinozaki
Summary: The fracture toughness and thermal conductivity of soda-lime glass were enhanced by introducing AgNPs through interfacial precipitation of Ag. The AgNPs improve the fracture toughness of the glass by promoting ductile deformation, crack deflection, and crack bridging. The thickness of the Ag layer increased with longer heat-treatment time.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Galyna Kotsay, Pawel Grabowski
Summary: This paper determines the properties of geopolymer pastes based on metakaolin and soda-lime waste glass. The experimental results show that the properties of geopolymers with waste glass depend on the liquid to solid substance ratio. Increasing the content of waste glass increases the fluidity of the geopolymer paste and reduces the amount of water glass used as an activator. The strength of geopolymers can be increased by adding up to 50% of soda-lime waste glass instead of metakaolin and by having a lower content of water glass.
Article
Construction & Building Technology
Bin Jiang, Yi Ding, Yazhou Guo, Yulong Li
Summary: This study focused on the mechanical properties of soda-lime silicate glass under compression, tension, and flexure. Quasi-static and dynamic tests were performed, and the effects of loading rates, specimen sizes, stress waves, and loading modes on the mechanical behavior of the glass were investigated. The results showed that specimen size and strain rate significantly influenced the strengths, and the compressive strength was sensitive to the loading stress waves. The flexural strength was generally higher than the tensile strength, and they could be converted through the non-local failure theory.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Chemistry, Analytical
Jin-Young Kim, Sang Sub Kim, Matteo Tonezzer
Summary: A resistive gas sensor decorated with palladium nanoparticles on a commercial soda-lime glass slide was studied for response and performance at different temperatures and gases, utilizing a new approach combining response values at different temperatures and support vector machine analysis. The system achieved perfect gas classification and accurate concentration estimation, demonstrating high selectivity and quantification ability.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Materials Science, Ceramics
Lorena R. Rodrigues, Alexander S. Abyzov, Vladimir M. Fokin, Edgar Dutra Zanotto
Summary: This article discusses the influence of structural relaxation on crystal nucleation process. It shows that structural relaxation has a significant impact on nucleation rate at low temperatures, leading to a continuous increase before reaching a steady state. The study also explains the alleged breakdown of CNT at low temperatures and reveals a significantly lower actual maximum nucleation temperature than previously reported values.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Peter Fielitz, Daniel R. Cassar, Nikolay S. Yuritsyn, Alexander S. Abyzov, Vladimir M. Fokin, Guenter Borchardt, Joachim Deubener
Summary: Isolated Na2O dot 2CaO dot 3SiO(2) (NC2S3) single crystals were grown at temperatures above the glass transition. The enrichment of Na in the continuous solid solution upon crystallisation causes a depletion of soda in the growing interfacial diffusion zone, resulting in a change in viscosity.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
Pratyush Srivastava, Koichi Tanaka, Brian Ramirez, Vijay Gupta
Summary: This study reports the nucleation of the Stishovite phase in shock-loaded soda-lime glass samples at a low compressive stress of 7 GPa. Experimental methods such as using a table-top setup and HRTEM imaging revealed 4 nm Stishovite crystals distributed within the amorphous SLG matrix.
Article
Chemistry, Physical
Abniel Machin, Kenneth Fontanez, Diego Garcia, Paola Sampayo, Carla Colon-Cruz, Gerardo J. Claudio-Serrano, Loraine Soto-Vazquez, Edgard Resto, Florian Petrescu, Carmen Morant, Francisco Marquez
Summary: The photocatalytic activity of silver-based catalysts with different amounts of molybdenum disulfide were evaluated for the degradation of ciprofloxacin and hydrogen production. The catalyst with 5%Ag@TiO2-P25-5%MoS2 showed the highest degradation rate of 91% and the catalyst with 5%Ag@TiO2 NWs-20%MoS2 showed the highest hydrogen production rate of 1792 mu mol/hg. The silver nanoparticles and MoS2 contributed to the enhanced performance of the catalysts. The stability tests also showed that the selected silver-based catalysts were stable after seven cycles.
Article
Chemistry, Multidisciplinary
Shenfeng Zhang, Jun Chen, Jixin Zheng, Xin Chen, Hongbo Xu, Florian Ion Tiberiu Petrescu, Liviu Marian Ungureanu, Ying Li, Gang Shi
Summary: A simple polypyrrole/polyvinylidene fluoride membrane with good self-floating ability and high photothermal conversion efficiency was fabricated by ultrasonically mixing and immersed precipitation. The photothermal conversion efficiency was further enhanced by forming a micropyramid structure on the surface of the membrane.
Article
Biochemistry & Molecular Biology
Kenneth Fontanez, Diego Garcia, Dayna Ortiz, Paola Sampayo, Luis Hernandez, Maria Cotto, Jose Duconge, Francisco Diaz, Carmen Morant, Florian Petrescu, Abniel Machin, Francisco Marquez
Summary: This study investigates the photocatalytic hydrogen evolution reaction (HER) by water splitting using TiO2 nanowires (TiO(2)NWs) as a catalyst, which was synthesized through a hydrothermal procedure. The catalyst was modified by incorporating different loadings of gold nanoparticles (AuNPs), exfoliated MoS2 nanosheets, and CeO2 nanoparticles (CeO(2)NPs) on the surface. Characterization techniques include electron microscopy, XPS, XRD, Raman, Reflectance, and BET surface area. The results demonstrate a synergistic effect between the different nanomaterials of the catalysts, and increasing the loading of MoS2 and CeO(2)NPs substantially improves the H-2 production.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Physical
Yuebo Jin, Florian Ion Tiberiu Petrescu, Yuan Wang, Xin Li, Ying Li, Gang Shi
Summary: A PMMA layer containing Au nanoparticles and a spiropyran monomolecular layer are coated on a PDMS substrate with inverted micro-pyramids using interface assembly and soft lithography. The composite structure, similar to insect compound eyes, enhances the fluorescence intensity of spiropyran by incorporating anti-reflection, surface plasmon resonance (SPR), and non-radiation energy transfer (NRET) effects. The composite substrate shows colorimetric and fluorescence responses during metal ion detection, with a detection limit of 0.281 mu M for Zn2+. However, further improvement in specific metal ion recognition is needed through spiropyran modification.
Article
Chemistry, Physical
Abniel Machin, Loraine Soto-Vazquez, Diego Garcia, Maria C. Cotto, Dayna Ortiz, Pedro J. Berrios-Rolon, Kenneth Fontanez, Edgard Resto, Carmen Morant, Florian Petrescu, Francisco Marquez
Summary: This study investigated the photocatalytic performance of different zinc oxide catalysts containing gold nanoparticles (AuNPs), molybdenum disulfide (MoS2), and reduced graphene oxide (rGO) for the degradation of levofloxacin (LFX) and ciprofloxacin (CFX) antibiotics in water. The study found that LFX was more resistant to degradation than CFX, and the main degradation pathway under visible light is the generation of hydroxyl radicals. Photoluminescence (PL) measurements confirmed the inhibitory effect of electron-hole recombination when AuNPs, MoS2, and rGO were integrated into the semiconductor. The catalyst with the highest percentage of CFX degradation was 1%Au@ZnONPs-3%MoS2-1%rGO, achieving a degradation efficiency of 96%, while the catalyst with the highest percentage of LFX degradation was 5%Au@ZnONPs-3%MoS2-1%rGO, exhibiting a degradation efficiency of 99.8%. Gas chromatography-mass spectrometry (GC-MS) analysis identified reaction intermediates and potential degradation pathways for both antibiotics. Recyclability assessments demonstrated that the synthesized catalysts maintained stable photocatalytic efficiencies after 15 cycles, indicating their potential for further usage and testing with other organic contaminants.
Article
Chemistry, Multidisciplinary
Peng Kang, Florian Ion Tiberiu Petrescu, Yao Wu, Ying Li, Xin Li, Likui Wang, Gang Shi
Summary: In conventional photo-thermal-electric conversion systems, energy loss is caused by the physical contact interface between the photo-thermal conversion module and the thermoelectric conversion module. A new integrated support material has been developed to solve this problem, where the modules are connected without an apparent physical interface. This reduces heat loss and improves the water evaporation rate and open-circuit voltage of the system compared to non-integrated systems.
Article
Chemistry, Multidisciplinary
Antreas Kantaros, Theodore Ganetsos, Florian Ion Tiberiu Petrescu
Summary: Three-dimensional scanning and 3D printing have become important tools in the cultural heritage field. Scanning is used to create digital models, while printing allows for physical copies of cultural objects. These technologies offer advantages in documentation, preservation, and education, but also face challenges such as specialized equipment and preservation concerns. Despite these challenges, 3D scanning and printing continue to grow in cultural heritage preservation.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Chemical
Antreas Kantaros, Evangelos Soulis, Theodore Ganetsos, Florian Ion Tiberiu Petrescu
Summary: 3D scanning, 3D printing, and CAD design software are important tools in the product development process of Industry 4.0. This work highlights the added value of using them together in a proposed workflow for developing a customized product, where the geometry of an existing item needs to be defined to fabricate and integrate an additional component seamlessly.
Article
Chemistry, Analytical
Abniel Machin, Maria Cotto, Jose Duconge, Carmen Morant, Florian I. Petrescu, Francisco Marquez
Summary: The present study focuses on the fabrication and performance of ammonia sensors based on SWCNTs coated with AuNPs. The sensors were prepared using sputtering and chemical deposition methods and their response to controlled concentrations of ammonia was investigated. The results showed that the sputtering-based deposition of AuNPs led to the best sensor performance, characterized by a rapid increase in resistance values upon exposure to ammonia. A novel device combining MoS2-AuNPs-SWCNTs was also developed, which showed improved sensor performance compared to devices with only AuNPs. Overall, this study provides valuable insights into the fabrication and optimization of SWCNT-based ammonia sensors for various applications.
Article
Materials Science, Composites
Ashraf A. M. Fadiel, Nuria S. Mohammed, Taher Abu-Lebdeh, Iulian Sorin Munteanu, Elisabeta Niculae, Florian Ion Tiberiu Petrescu
Summary: Most metropolitan areas worldwide are currently facing significant solid waste disposal problems, partly due to their negative impact on public health and the environment, as well as the potential dangers to nearby residential communities. One possible solution is to reuse solid waste as a partial replacement for concrete materials. This study investigated the use of crumb rubber as a replacement for fine aggregate in concrete, using a novel treatment technique involving chemical and thermal treatments. The mixtures were evaluated in terms of workability, wet density, compressive strength, tensile strength, flexural strength, dry density, and absorption. Non-destructive tests, such as the ultrasonic pulse velocity test, rebound hammer test, and core test, were also conducted. The results showed that the addition of rubber particles to concrete decreased its strength but remained structurally acceptable, with compressive strength ranging from 34 to 42 MPa after 180 days.
JOURNAL OF COMPOSITES SCIENCE
(2023)
Article
Chemistry, Physical
Antreas Kantaros, Evangelos Soulis, Florian Ion Tiberiu Petrescu, Theodore Ganetsos, Young-Hag Koh
Summary: The emergence of additive manufacturing technologies, particularly Fused Deposition Modeling/Fused Filament Fabrication (FDM/FFF) 3D printing, has transformed industries by enabling rapid prototyping and small-scale production. However, the limited range of suitable materials has hindered the potential of FDM/FFF in applications requiring improved mechanical, thermal, and electrical properties. This study explores the integration of reinforcements such as carbon fibers, glass fibers, and nanoparticles into the polymer matrix of FDM/FFF filaments to enhance the performance of 3D-printed parts. Additionally, the article highlights the challenges associated with using filled filaments in FDM/FFF printing and showcases various practical implementations with significant benefits in industries such as aerospace, automotive, medical, electronics, and tooling.
Article
Chemistry, Multidisciplinary
Xin Li, Wei Lin, Florian Ion Tiberiu Petrescu, Jia Li, Likui Wang, Haiyan Zhu, Haijun Wang, Gang Shi
Summary: This study introduces an innovative photothermal evaporator that utilizes solar energy to drive oil-water separation and detect Fe3+ concentration in wastewater. Through surface modifications, this evaporator achieves sustained and stable oil-water separation, high evaporation rate, and high sensitivity for Fe3+ detection.
Article
Biochemistry & Molecular Biology
Xin Li, Jionghao Feng, Haijun Wang, Florian Ion Tiberiu Petrescu, Ying Li
Summary: By fixing silver oxide/silver (Ag2O/Ag) nanoparticles inside the polyacrylamide-acrylic acid hydrogel using silver-disulfide bonding, the issue of organic pollutants accumulation in solar-driven hydrogel water evaporator is resolved. This self-healing hydrogel membrane has excellent properties such as high fracture stress, great fracture elongation, high evaporation rate, and efficient photocatalytic degradation of methyl orange.
Article
Materials Science, Composites
Ashraf A. M. Fadiel, Taher Abu-Lebdeh, Iulian Sorin Munteanu, Elisabeta Niculae, Florian Ion Tiberiu Petrescu
Summary: The use of rubberized concrete as a solution for disposing waste materials and construction applications is gaining popularity. This study evaluated the performance of rubberized concrete under different temperature levels. Rubberized concrete specimens were prepared with varying amounts of crumb rubber and exposed to temperatures of 200°C, 400°C, and 600°C. The study found that rubberized concrete with 5% to 15% rubber content experienced less reduction in compressive strength compared to conventional concrete, and splitting tensile strength was more sensitive to elevated temperatures.
JOURNAL OF COMPOSITES SCIENCE
(2023)
Article
Engineering, Multidisciplinary
Ashraf A. M. Fadiel, Nuria S. Mohammed, Ahmad Baharuddin Abdul Rahman, Esam Abu Baker Ali, Taher Abu-Lebdeh, Florian Ion Tiberiu Petrescu
Summary: This study investigates the mechanical characteristics and performance of polyester grout containing fly ash as an infill material for grouted connections. The addition of fly ash improves the strength of the grout up to a certain volume, beyond which the properties start to deteriorate.
Article
Mechanics
Xiaolong Liu, Kelian Luo, Pengcheng Gao, Tao Cong, Xi Wang, Wenjing Wang
Summary: This paper investigates the formation mechanisms of the zig-zag crack region on the shattered rim of railway wheels. The zig-zag crack region, identified as a typical region for crack propagation in rolling contact fatigue behavior, was observed using scanning electron microscopy and transmission electron microscopy. The formation of the zig-zag morphology is attributed to the periodic deflection of the propagation path relative to the initial propagation plane, caused by the limited plastic deformation zone at the crack tip. Grain refinement and secondary cracks in the zig-zag crack region are a result of the large compressive and shear stresses induced by rolling contact loading.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Anastasia Iziumova, Aleksei Vshivkov, Ivan Panteleev, Virginia Mubassarova, Oleg Plekhov, Denis Davydov
Summary: The aim of this study was to investigate the correlation between structural, acoustic emission, and thermal characteristics of fatigue crack growth in titanium alloys. Cluster analysis of the acoustic emission signals revealed two different types of signals observed during the fatigue crack development. It was experimentally demonstrated that the stored energy tends to reach an asymptotic value at the final stage of fatigue crack growth and this is correlated with the twinning process intensification in titanium alloy Ti Grade 2. A correlation was assumed between the stages of change in heat flux, the cumulative energy of the first cluster of acoustic emission signals, and the crack length.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
M. Vieira de Carvalho, I. A. Rodrigues Lopes, F. M. Andrade Pires
Summary: This study investigates the numerical challenges of fracture mechanics models within implicit quasi-static frameworks and proposes an instability criterion. The ratio of cohesive to internal power is identified as a crucial factor. Two strategies for handling fracture problems with instabilities are discussed and a comparative assessment is performed. The study also examines more complex material responses, including transformation-induced plasticity effects.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Thomas Duminy, Aurelien Doitrand, Sylvain Meille
Summary: This study conducted in situ wedge splitting tests on millimeter-size PMMA samples and proposed a method to determine the material tensile strength and critical energy release rate using digital image correlation and a full finite element implementation of the coupled criterion.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Xin Chang, Xingyi Wang, Chunhe Yang, Yintong Guo, Yanghui Wan
Summary: The influence of cyclic thermal shock and high-temperature acid etching on the Mode I fracture of shale was investigated in this study. It was found that cyclic thermal shock severely degrades the strength and fracture toughness of shale, while high-temperature acid etching treatment improves the fracture toughness. These findings are valuable for optimizing process parameters to reduce initiation pressure in deep shale formations.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Liaojun Yao, Mingyue Chuai, Zhangming Lyu, Xiangming Chen, Licheng Guo, R. C. Alderliesten
Summary: Methods based on fracture mechanics have been widely used in fatigue delamination growth (FDG) characterization of composite laminates. This study proposes appropriate similitude parameters to represent FDG behavior with different R-ratios.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Zesheng Zang, Zhonghui Li, Yue Niu, Shan Yin
Summary: This study conducted experiments and recorded signals to investigate the fracture behavior and damage evolution characteristics of coal samples. The results showed that as loading proceeds, the stress, electric potential (EP), and acoustic emission (AE) values increase, and EP and AE signals are excited when stress drops. The fracture behavior of coal samples is altered by flaw inclination, and the destruction mode becomes increasingly complicated. The damage evolution characteristics of coal samples can be evaluated and analyzed by defining the coefficient of variation (CV value) of EP and the b value of AE.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Clotilde Berdin, Nathalie Prud'homme
Summary: In this study, zirconia layers with different fractions of tetragonal phase and thicknesses were tested for multi-cracking behavior. Cracks perpendicular to the tensile direction were observed, showing a blunting effect into the substrate. The ratio of crack spacing at saturation to layer thickness decreased as the layer thickness increased. Unit cell modeling was used to establish a relationship between crack spacing and layer strength, which fell within the bounds of Hu and Evans model and was found to be insensitive to the tetragonal zirconia fraction.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Huadong Zhang, Weichen Kong, Y. H. Liu, Yuh J. Chao
Summary: Williams' series expansion crack tip solution in linear elasticity is modified to include a uniform crack face pressure. Practical methods to calculate T-stress from near crack tip stresses are outlined. The analytical results are consistent with numerical results.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Jiahao Kong, Haoyue Han, Tao Wang, Guangyan Huang, Zhuo Zhuang
Summary: This paper introduces a phase-field model for polymer foam materials by combining the phase-field method with the crushable foam model. The model is calibrated using experimental data and successfully simulates the fracture processes of polyurethane under different loading conditions. The study is important for the engineering applications of polymer foam materials.
ENGINEERING FRACTURE MECHANICS
(2024)
