Article
Chemistry, Physical
Meng Wang, Xiaochen Hang
Summary: New finite element analysis procedures are developed to accurately determine the stress distribution patterns in prestressed composites. The modified procedures consider the effects of polymer curing, prestress application, and interphases' properties. Results indicate that an increase in prestress levels can lead to interphase debonding, while enhanced elastic modulus or coefficient of thermal expansion in interphases results in higher circumferential and axial stress values. Heterogeneous elastic modulus leads to significant stress gradients in the interphase.
Article
Materials Science, Composites
Somayeh Ghasemi, Behnood Ghasemi, Amirhossein Espahbodi, Ghasem Asadpour
Summary: In this study, the Ji-developed model was used to predict interphase thickness and modulus of nanocomposites. The model was evaluated for accuracy by comparing it to experimental data. The effects of using compatibilizers or modified nanocellulose on the interphase parameters were also investigated. The results showed that the Ji model improved the prediction of young modulus by considering interphase thickness in nanocomposites.
JOURNAL OF COMPOSITE MATERIALS
(2023)
Article
Materials Science, Ceramics
Xiaolin Dang, Donglin Zhao, Tong Guo, Xiaomeng Fan, Jimei Xue, Fang Ye, Yongsheng Liu, Laifei Cheng
Summary: The oxidation behavior of C/SiC is controlled by microcracks in the matrix caused by the mismatch between carbon fibers and SiC matrix. To improve the oxidation resistance, multilayer SiC-Si3N4 matrices were used to change the stress distribution. The microcracks in the matrix would be deflected at the transition layer between different layers, thus improving the oxidation resistance of C/SiC.
JOURNAL OF ADVANCED CERAMICS
(2022)
Article
Materials Science, Ceramics
Donglin Zhao, Tong Guo, Xiaomeng Fan, Chao Chen, Yue Ma
Summary: The effect of pyrolytic carbon (PyC) thickness on the tensile property of mini T800 carbon fiber reinforced SiC matrix composites (C/SiC) was studied. The results showed that the tensile strength increased first and then decreased with the increase of PyC thickness, reaching the maximum value at 100 nm. The Weibull modulus also increased with PyC thickness, indicating that regulating PyC thickness can improve tensile properties.
JOURNAL OF ADVANCED CERAMICS
(2021)
Article
Engineering, Geological
Zi-jun Feng, Yang-sheng Zhao, Dong-na Liu
Summary: The research shows that the permeability of granite increases with temperature, with coarser-grained granite exhibiting a more significant increase in permeability. Factors such as grain size, temperature, and elastic modulus have a significant impact on thermal cracking and induced permeability.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Materials Science, Composites
Weipeng Zheng, Zhangxin Guo, Zhihua Wang, Chai Gin Boay, Xiaojun Wang, Yongcun Li
Summary: This article describes the research on the elastic properties of carbon nanotube reinforced composite materials and graphene-carbon nanotube (G-C) reinforced composite materials in detail. The results show that as the volume fraction of graphene and carbon nanotubes increases, the Young's modulus and shear modulus of the reinforced composite material increase significantly. In addition, the tilt angle and quantity of graphene and carbon nanotubes will also affect the elastic properties of the composite material.
POLYMER COMPOSITES
(2022)
Article
Polymer Science
Sergey Panin, Jiangkun Luo, Dmitry G. Buslovich, Vladislav O. Alexenko, Filippo Berto, Lyudmila A. Kornienko
Summary: The structure, mechanical and tribological properties of PEI- and PI-based composites reinforced with carbon fibers and loaded with solid lubricant fillers were studied. The results showed that the tribological properties of the composites were determined by the adherence of the transfer film on the wear track surfaces, which depended on the chemical structure of the polymer matrix and the test temperatures.
Article
Biochemistry & Molecular Biology
Aigul Shamsieva, Alexander Evseev, Irina Piyanzina, Oleg Nedopekin, Dmitrii Tayurskii
Summary: The use of carbon nanotubes is a promising direction in materials science for improving the mechanical properties of polymers. The addition of single-walled carbon nanotubes to a polymer can significantly enhance its mechanical, electrical, optical, and structural properties. However, there is a limit to the improvement, and exceeding a certain content of nanotubes can lead to a decrease in mechanical properties.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
L. Lorenz, T. Chudoba, S. Makowski, M. Zawischa, F. Schaller, V Weihnacht
Summary: A new empirical fit model named "sigmoid" is proposed in this study, which outperforms existing fit models in terms of goodness of fit and stability based on a large number of nanoindentation measurements on ta-C coatings. Additionally, it is demonstrated that the fit parameter of the sigmoid model directly correlates with the coating thickness, allowing for a new approach to determine ta-C coating thickness.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Materials Science, Composites
Hui Ling, Ziting Zhen, Yuhang Sun, Gang Li, Chao Wang, Xiaoping Yang
Summary: In this study, naphthalenediimide copolymers with different flexible chain lengths were used to construct a rigid-flexible interphase on high modulus carbon fiber (HMCF) surface. The interfacial performance and interphase reinforcing mechanism of the composites were investigated. It was found that the surface activity and roughness of HMCF increased gradually with the introduction of LN, MN, and SN copolymers. HMCF-SN composites showed wider transit-modulus platform, increased interphase thickness, improved deformation, and decreased thermal residual stress compared to HMCF-LN and HMCF-MN composites. The highest improvement in transverse fiber bundle test strength (TFBT) and interfacial shear strength (IFSS) was achieved in HMCF-SN composites due to the reduced flexible chain lengths and increased functionality of SN copolymers, resulting in effective relaxation of interfacial stress and stronger chemical interaction with the matrix.
POLYMER COMPOSITES
(2023)
Article
Agricultural Engineering
Somayeh Ghasemi, Amirhossein Espahbodi, Nima Gharib, Yasser Zare, Kyong Yop Rhee
Summary: This study analyzes the tensile modulus of nanocellulose-reinforced composites and reveals the effects of nanocellulose treatment, radius, and interphase modulus on the relative modulus. The results show that nanocellulose treatment increases the modulus and thickness of the interphase, and the nanocellulose modulus and radius significantly affect the relative modulus, while the interphase modulus only has a significant effect within a certain range.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Materials Science, Ceramics
Katsuki Hayashi, Kazuki Mitsui, Tatsuki Shimizu, Rikiya Kado, Takumi Umada, Akio Koike, Satoshi Yoshida, Seiji Inaba, Akira Saitoh
Summary: The Makishima-Mackenzie relationship, which involves dense packing structures and dissociation energy in oxides, allows the fabrication of oxide glasses with high Young's modulus and a small coefficient of thermal expansion. Increasing MgO and Ta2O5 contents in a glass system leads to these desired properties. The oxides Al2O3 and Ta2O5 play a crucial role in dense packing structures.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Review
Materials Science, Multidisciplinary
Lekhani Tripathi, B. K. Behera
Summary: Honeycomb is an excellent structural material with high strength, shear rigidity, energy absorbing property, low weight, and almost constant crushing force. The hollow spaces in honeycomb structures reduce weight while ensuring required strength. 3D woven honeycomb composites have promising applications as substitutes for aluminum and other metal alloys.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Materials Science, Textiles
Qi Xiao, Rui Wang, Xin Lu, Shujie Zhang, Sun Hongyu
Summary: This study aims to numerically analyze the effects of polyester fiber performance on the pilling of polyester-cotton woven fabrics. The results show that an increase in fiber diameter decreases the pilling grades, while increasing the fiber friction coefficient and elastic modulus have certain effects on the pilling grades.
TEXTILE RESEARCH JOURNAL
(2022)
Article
Chemistry, Physical
Shanghong Duan, Anand H. S. Iyer, David Carlstedt, Florian Rittweger, Andrew Sharits, Calvin Maddox, Karl-Ragmar Riemschneider, David Mollenhauer, Magnus Colliander, Fang Liu, Leif E. Asp
Summary: This study investigates the moduli changes of carbon fibre electrodes under different lithiation states, revealing that the transverse modulus of the lithiated fibre is more than double that of the pristine and delithiated fibres.