Article
Materials Science, Multidisciplinary
Ali Dadrasi, Alireza Albooyeh, Sasan Fooladpanjeh, Azam Salmankhani, Amin Hamed Mashhadzadeh, Mohammad Reza Saeb
Summary: In this study, the mechanical and fracture behavior of mono- and polycrystalline BC3 nanosheets were investigated, showing that the number of grain boundaries and crack defects can significantly affect their mechanical properties.
MECHANICS OF MATERIALS
(2022)
Article
Multidisciplinary Sciences
Hewan Li, Jian Liu, Laigui Wang, Tianjiao Ren
Summary: This paper proposes a method to analyze rock samples with different inclination angles from the standpoint of energy, using the bond-base peridynamic theory and the PMB model of brittle materials, combined with laboratory experiments. The whole process of shearing is analyzed, and the LAMMPS software is used to simulate the internal energy change of rock-like materials under shear conditions. The result shows that prefabricated cracks and the inclination of cracks are important factors for specimen damage, which has important theoretical value for rock mechanics research. The research results can reduce the occurrence of rock burst accidents, the difficulty of mine support, and the cost of mining engineering, as well as improve mine safety levels.
SCIENTIFIC REPORTS
(2023)
Article
Biochemical Research Methods
Babak Bagheri, Maryam Zarghami Dehaghani, Mohammad Esmaeili Safa, Payam Zarrintaj, Amin Hamed Mashhadzadeh, Mohammad Reza Ganjali, Mohammad Reza Saeb
Summary: The fracture behavior of polycrystalline carbon nanosheets, modeled using heterogeneous graphitic carbon nitride, was studied through molecular dynamics simulations. It was found that increasing the number of grain boundaries and crack length resulted in a significant decrease in Young's modulus, while small cracks exhibited higher fracture toughness. This theoretical approach can be generalized to capture the unique fracture fingerprint of different types of polycrystalline carbon structures.
JOURNAL OF MOLECULAR GRAPHICS & MODELLING
(2021)
Article
Materials Science, Multidisciplinary
Shiqiu Liu, Yaofeng Luo, Hongsheng Ding, Ruirun Chen, Jingjie Guo, Hengzhi Fu
Summary: High-density deformation nanotwins significantly strengthen TiAl-based alloys, but usually result in a reduction in fracture toughness for most structural materials. It is necessary to investigate the benefits of high-density deformation nanotwins for improving the fracture toughness of TiAl-based alloys. In this study, the fracture toughness of two heat-treated Ti-45.5Al-4Cr-2.5Nb alloys with a favorable twinning deformation mechanism is compared with that of the unannealed alloy. It is found that the heat-treated alloys exhibit higher fracture toughness than the unannealed alloy. Shear ligaments and slip bands are the main toughening mechanisms for the heat-treated alloys, which are closely related to the enhanced plastic deformability of lamellar structures. Moreover, the increase in (B2 + gamma)-coupled structures has a negative effect on the toughening of the investigated alloys. High-density deformation nanotwins improve the fracture toughness of TiAl-based alloys by enhancing their fracture strength and plastic deformability, while reducing their work-hardening exponent.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Xiaoteng Fu, Fan Zhang, Wang Zhu, Zhipeng Pi
Summary: In this study, ZYTO composite ceramics were prepared and their microstructure and mechanical properties were investigated. The results showed that the addition of M-YTaO4 refined the grain boundary and strengthened the composite's strength, while also inducing residual stress and ferroelastic domains, resulting in enhanced fracture toughness.
Article
Engineering, Geological
L. Ren, H. P. Xie, X. Sun, R. Zhang, C. B. Li, J. Xie, Z. T. Zhang
Summary: The study investigates the fracture properties of Lower Silurian Longmaxi shale by conducting three-point bend tests in three principal fracture orientations. The results show the critical shape coefficient depends on the anisotropic elasticity of the investigated shale, and using a critical shape coefficient for isotropic rock could lead to a maximum error in the calculated fracture toughness. Additionally, the mode I fracture toughness varies across different fracture orientations, with a progressive decrease in fracture energy observed.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Xuefeng Yang, Zhengxin Li, Fuming Deng
Summary: The addition of graphene nanosheets can improve the performance of PDC composites, with 0.2 wt% of graphene nanosheets showing the best comprehensive performance, enhancing impact toughness and increasing heat-resistant temperature.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2021)
Article
Engineering, Mechanical
Jiuzhou Huang, Wen Hua, Dengsong Li, Xiang Chen, Xutao You, Shiming Dong, Jianxiong Li
Summary: Fracture tests were conducted on cracked Brazilian disc specimens to study the compression-shear fracture properties of sandstone under confining pressure. The results show that the confining pressure environment contributes to the increase in the strength of the sandstone. The fracture toughness of sandstone specimens exhibits a linear correlation with the confining pressure.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
Article
Materials Science, Multidisciplinary
Qiang Li, Sheng Huang, Yakai Zhao, Yimin Gao, Upadrasta Ramamurty
Summary: In titanium matrix composites (TMCs), the addition of ceramic reinforcements enhances strength and specific stiffness but lowers ductility and fracture toughness due to the location of the reinforcement particles at the grain boundaries. This study demonstrates that simultaneously enhancing strength, ductility, and fracture initiation toughness (KQ) is possible if the particles are micron sized and predominantly present within the grains. The microstructural design of TMCs, especially the location of reinforcements with respect to grain boundaries, plays a crucial role in determining the overall mechanical performance.
Article
Engineering, Mechanical
Marco Maurizi, Bryce W. Edwards, Chao Gao, Julia R. Greer, Filippo Berto
Summary: Nano-architected lattices, a novel class of mechanical metamaterials, demonstrate unprecedented mechanical properties by exploiting small scale material effects and structural topology. However, the understanding of fracture characteristics and properties of these 3D nano-architected lattices still hinders the design and realization of future engineering applications.
EXTREME MECHANICS LETTERS
(2022)
Article
Materials Science, Composites
Guorui Yang, Yan Ma, Chen Liu, Lanyue Zhang, Xiangwei Li, Weifeng Du, Lei Shang, Yuhui Ao
Summary: Inspired by the strengthening effect of nanoparticles and the toughening effect of block polymers, a block polymer filler with graphene oxide (GO) was prepared, which significantly improved the mechanical properties of epoxy composites. The combination of GO and side groups promoted dispersion and toughening. This research has potential application value in the field of resin fillers and in combination with other materials.
POLYMER COMPOSITES
(2022)
Article
Nuclear Science & Technology
Long Tan, Songyang Li, Liangyin Zhao, Lulu Wang, Xiuxiu Zhao
Summary: This study examines the local mechanical properties of narrow-gap welded joints using the microshear test method, and investigates the influence of weld joints micromechanical inhomogeneity on the crack tip opening displacement (CTOD) fracture toughness.
NUCLEAR ENGINEERING AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Yuan Wang, Yunbo Xu, Yu Wang, Jiayun Zhang, Chengyu Guo, Xu Wang, Wenzhu Zhao, Hongliang Liu
Summary: To address the challenges of lightweight, safety, and emission reduction in the automotive industry, the researchers fabricated transformation-induced plasticity aided bainitic ferrite (TBF) steel by controlling the size and shape of bainitic ferrite and compared it with quenching and partitioning (Q & P) steels. The effects of bainite transformation on mechanical properties, microvoid formation, and crack propagation were analyzed. The T-375 samples exhibited outstanding properties with a hole expansion ratio (HER) of 33.5%, total elongation of 16.9%, tensile strength of 1191 MPa, and yield strength of 934 MPa.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Polymer Science
Yuki Ogawa, Kimiyoshi Naito, Keisuke Harada, Hiroyuki Oguma
Summary: This study compared and analyzed the critical separation energy of three SGA adhesives, as well as examined the mechanical properties of the bond. It was found that the highly ductile adhesive showed plastic deformation in the steel adherends during the loading-unloading test, while the high tensile strength and modulus adhesives experienced a sudden decrease in load without plastic deformation. The critical separation energy increased with increasing adhesive thickness, and the highly ductile adhesives were more affected by adhesive thickness than highly strength adhesives.
Article
Materials Science, Ceramics
Bo Wang, Delong Cai, Chengyong Xue, Bo Niu, Zhihua Yang, Xiaoming Duan, Daxin Li, Dechang Jia, Yu Zhou
Summary: Laminated B4C-TiB2 ceramics with h-BN interface layers were successfully prepared using roll forming and tape casting techniques. Increasing the number of h-BN layers can effectively enhance the fracture toughness of the ceramics, resulting in significantly improved performance compared to monolithic B4C ceramics.
CERAMICS INTERNATIONAL
(2021)
Article
Biochemistry & Molecular Biology
Morteza Motahari Rad, Nahid Bijeh, Seyyed Reza Attarzadeh Hosseini, Aliakbar Raouf Saeb
Summary: This study investigated the effects of different sequences of concurrent training on adults with type 2 diabetes mellitus. The results showed that regardless of the sequence, concurrent training increased irisin and FST concentrations while decreasing MSTN concentrations. Additionally, concurrent training improved body composition, strength, and peak oxygen uptake.
ARCHIVES OF PHYSIOLOGY AND BIOCHEMISTRY
(2023)
Review
Biotechnology & Applied Microbiology
Negin Jalilinejad, Mohammad Rabiee, Nafiseh Baheiraei, Ramin Ghahremanzadeh, Reza Salarian, Navid Rabiee, Omid Akhavan, Payam Zarrintaj, Aleksander Hejna, Mohammad Reza Saeb, Ali Zarrabi, Esmaeel Sharifi, Satar Yousefiasl, Ehsan Nazarzadeh Zare
Summary: Human cardiac tissue lacks proper self-regenerating capability, making tissue engineering critical for addressing the growing rate of deaths associated with cardiovascular disorders. Carbon-based nanomaterials, specifically their conductivity, have revolutionized tissue engineering by providing an appropriate microenvironment for cell protection against attacking mechanisms. The use of conductive biomaterials in cardiac tissue engineering, including graphene, graphene oxide, carbon nanotubes, and carbon nanofibers, has been studied extensively.
BIOENGINEERING & TRANSLATIONAL MEDICINE
(2023)
Editorial Material
Chemistry, Physical
Paulina Wisniewska, Aleksander Hejna, Mohammad Reza Saeb
Article
Nanoscience & Nanotechnology
Vahid Vatanpour, Seyed Ali Naziri Mehrabani, Mahdie Safarpour, Mohammad Reza Ganjali, Sajjad Habibzadeh, Ismail Koyuncu
Summary: In this study, non-thermal glow discharge plasma was used to modify the surface of natural clinoptilolite zeolite before incorporating it into polyethersulfone (PES) membrane. The effect of plasma gas pressure on fouling resistance and separation performance of the membranes was investigated. The results showed that increasing plasma gas pressure improved the water flux and antifouling behavior of the membranes, while enhancing the dye separation efficiency.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Thermodynamics
Farshad Nouri, Sajjad Habibzadeh, Hamid Reza Norouzi
Summary: This study developed a CFD model to analyze the current distribution in a narrow-gap chlor-alkali electrochemical reactor, considering the effect of gas-liquid hydrodynamics. The results showed that the electrolyte concentration variation significantly affects the current distribution, and bubbles increase the operating electrical potential. Furthermore, increasing the electrolyte inlet velocity and concentration can mitigate the non-uniformity of current density in the electrode.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Chemistry, Physical
Neda Hosseinzadeh, Sajjad Habibzadeh, Rouein Halladj
Summary: Photoelectrocatalytic pollutant degradation is a promising advanced oxidation process for wastewater treatment, and its efficiency relies heavily on the development of photoelectrocatalyst materials. In this study, ternary Ti0.2-Vx-Bi(0.8-x)-oxides were synthesized and applied as photoelectrocatalysts for pollutant degradation. The optimal composition of Ti0.2V0.4Bi0.4-oxide exhibited superior performance in terms of photocurrent, degradation time, and could efficiently degrade methyl orange and rifampin solutions under visible light irradiation. The excellent activity and stability of Ti0.2V0.4Bi0.4-oxide make it an efficient photoelectrocatalyst for pollutant degradation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Polymer Science
Seyed Mohamad Reza Paran, Ghasem Naderi, Moslem Mirzaee, Mir Hamid Reza Ghoreishy, Marcin Wloch, Amin Esmaeili, Otman Abida, Mohammad Reza Saeb
Summary: The addition of halloysite nanotubes (HNTs) to EPDM/NBR rubber blends leads to improvements in crosslinking rate, tensile strength, thermal stability, and solvent uptake. The microstructure analysis reveals proper dispersion of HNTs within EPDM/NBR. The theoretical estimation of the modulus shows good agreement with experimental results.
Editorial Material
Polymer Science
Mohammad Reza Saeb, Henri Vahabi
Article
Polymer Science
Henri Vahabi, Elnaz Movahedifar, Baljinder K. Kandola, Mohammad Reza Saeb
Summary: In 2019, Flame Retardancy Index (FRI) was introduced as a universal index for classifying flame-retardant polymer materials. FRI quantifies the flame retardancy performance on a logarithmic scale based on peak Heat Release Rate (pHRR), Total Heat Release (THR), and Time-To-Ignition (t(i)) from cone calorimetry data. It has proved to be reliable for ranking polymer materials in terms of flame retardancy performance over the past four years. Additionally, new variants and the Flammability Index (FI) based on Pyrolysis Combustion Flow Calorimetry (PCFC) data were defined to further analyze the relationship between FRI and FI.
Article
Chemistry, Physical
Ali Molaei Aghdam, Sajjad Habibzadeh, Mehran Javanbakht, Mahshid Ershadi, Mohammad Reza Ganjali
Summary: This study presents a low-cost and straightforward alpha-MnSe-nanorod (NR) cathode active material (CAM) with superior function in rechargeable aqueous zinc-ion batteries. The synthesized alpha-MnSe-NR cathode exhibits a large tunnel diameter and an interlayer spacing, leading to higher Zn2+ storage capacity and better pseudocapacitive performance compared to alpha-MnO2. The developed cathode achieves high reversible capacity and durable cyclability, while the coinsertion process of hydrated H+/Zn2+ in MnSe-EO and the self-regulating mechanism of electrolyte-involved production of flake-like zinc hydrogen sulfate are clarified.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Analytical
Awais Khalid, Pervaiz Ahmad, Roomia Memon, Lamyaa F. Gado, Mayeen Uddin Khandaker, Hanadi A. Almukhlifi, Yosra Modafer, Najma Bashir, Otman Abida, Fahdah Ayed Alshammari, Abdelmajid Timoumi
Summary: Renewable energy can be obtained from wastewater by utilizing photocatalysis with Zinc oxide (ZnO), Copper-doped Zinc oxide (CuZnO), and Cobalt-doped Zinc oxide (CoZnO) nanostructures (NSs). The synthesized nanostructures showed good crystalline and structural stability, as confirmed by XRD and FESEM analysis. The highest photodegradation rate was observed on pH similar to 12 using ZnO, CoZnO, and CuZnO, and the photodegradation of methylene blue demonstrated the superior performance of ZnO, CuZnO, and CoZnO. Thus, CuZnO is recommended for industrial wastewater treatment like methylene blue.
Review
Environmental Sciences
Hussein E. Al-Hazmi, Ali Mohammadi, Aleksander Hejna, Joanna Majtacz, Amin Esmaeili, Sajjad Habibzadeh, Mohammad Reza Saeb, Michael Badawi, Eder C. Lima, Jacek Makinia
Summary: Considering water scarcity and increased water consumption, sustainable water recycling and wastewater reuse are urgent. A comprehensive literature review reveals that poor treatment of wastewater leads to increased pathogen and microbial threats, plant and soil contamination, as well as potential long-term health risks from emerging pollutants. Standardized analytical techniques should be developed to assess the effects of hazardous chemicals and heavy metals on human health.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Physical
Ali Shahroudi, Farhad Keivanimehr, Sajjad Habibzadeh
Summary: Cerium-doped nickel phosphide is used as a novel electrocatalyst for the hydrogen evolution reaction (HER). The doping of cerium decreases the crystallite size and particle size of pure nickel phosphide, and improves the electrochemical characteristics, leading to enhanced HER performance. The optimum cerium doping amount is found to be 3%mol, showing the highest activity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Green & Sustainable Science & Technology
Paulina Wisniewska, Natalia A. Wojcik, Jacek Ryl, Robert Bogdanowicz, Henri Vahabi, Krzysztof Formela, Mohammad Reza Saeb
Summary: Recycling and management of rubber wastes have reached an early-stage maturity in the pursuit of sustainable and circular materials. However, the solutions for sustainable development of rubber wastes are limited, resulting in inadequate properties and performance features of recycled products. In this study, a experimental protocol is introduced for manufacturing semi-sustainable polymer composites using ground tire rubber (GTR) and ethylene-vinyl acetate copolymer (EVA). The resulting composites are analyzed for their processing, properties, and performance features. The study shows promising properties and performance for highly-loaded 50/50 GTR/EVA systems, with good flexibility for additive manufacturing. The tensile strength is independent of carbon black (CB) type and blend composition, while the elongation at break changes depending on the CB type and content. The thermal stability, flame retardancy, and electrical conductivity of the composites are also examined.
JOURNAL OF CLEANER PRODUCTION
(2023)
Review
Chemistry, Applied
Henri Vahabi, Fatemeh Gholami, Martin Tomas, Elnaz Movahedifar, Mohsen Khodadadi Yazdi, Mohammad Reza Saeb
Summary: Hydrogels and aerogels are multifunctional engineering materials with promising characteristics such as toughness, flexibility, water absorption capacity, and porosity. They have been extensively researched and used as flame-retardant materials, and their latest advancements and future developments in flame retardancy are reviewed in this work.
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
(2023)
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)