Article
Materials Science, Composites
Zaibin Zhu, Kangyi Lu, Hui Ling, Yunhua Yu, Gang Li, Xiaoping Yang
Summary: In this study, CNT film prepreg was prepared and used to fabricate interlayer stiffened and reinforced CFRP composites with enhanced compressive strength. The effect of CNT film prepreg on the longitudinal compressive strength and elastic-plastic failure mechanism of the composites was investigated.
COMPOSITES COMMUNICATIONS
(2023)
Article
Materials Science, Composites
Kangyi Lu, Wenmo Zhu, Qingfu Su, Gang Li, Xiaoping Yang
Summary: The study investigated the effects of high modulus epoxy matrix on composite properties and proposed a compression failure mechanism. Increasing the matrix modulus through chemical cross-linking and mechanical restraint can improve interface properties and increase compressive strength.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Polymer Science
Se-Jin Choi, Sung-Ho Bae, Jae-In Lee, Eun Ji Bang, Hoe Young Choi, Haye Min Ko
Summary: This study explores the use of chitosan-based bio-inspired polymers to improve the strength and durability of cement concrete. By adjusting the pH during synthesis, the characteristics of the polymers were successfully tuned. The study found that adding bio-inspired polymers can significantly enhance the compressive and tensile strengths of cement concrete.
Review
Construction & Building Technology
Haihua Yang, Liang Liu, Wu Yang, Hanlong Liu, Waqas Ahmad, Ayaz Ahmad, Fahid Aslam, Panuwat Joyklad
Summary: Cement, a key component of concrete, requires significant energy for production and emits CO2, leading to efforts to develop an alternative binder. Geopolymer composite (GPC) is proposed as a clean alternative for sustainable construction. A scientometric analysis identified key data on GPC research and highlighted research gaps and concerns.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Harri Junaedi, Muneer Baig, Abdulsattar Dawood, Essam Albahkali, Abdulhakim Almajid
Summary: The study introduces a simplified approach to correlate the experimental tensile strength values of randomly oriented short fiber reinforced polymer-based composites, deriving a constitutive model based on a rule of mixtures. The experimental results demonstrate the significant influence of fiber orientation and interfacial stress on the composite's tensile strength, with the proposed model showing good agreement with experimental data. The analytical model outperforms other models in accurately predicting the behavior of short fiber reinforced composites.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
S. M. Liang, H. M. Ji, X. W. Li
Summary: Growth bands in abalone shells have a significant impact on their mechanical properties. Under compressive stress, growth bands can bend without fracturing, resulting in lower strength but higher toughness. However, under tensile stress, the weaker organic matrix interlayer in growth bands initiates micro-cracks, leading to lower strength and toughness.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Green & Sustainable Science & Technology
Linfeng Zhang, Yingfan Wang, Boyin Ding, Jiaming Gu, Neven Ukrainczyk, Jingming Cai
Summary: This study aims to develop geopolymer-based composites for geothermal energy applications. The addition of silicon carbide (SiC) powder was found to improve the compressive and flexural strength of geopolymer composites, while the influence of SiC particles was insignificant. The combined application of SiC powder and SiC particle increased the thermal conductivity of geopolymer composites, making it a suitable material for geothermal energy applications. The addition of silicon carbide was also concluded to improve the heat exchange rate and heat utilization efficiency of energy piles.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Polymer Science
Janos Koth, Katalin Sinko
Summary: A new sol-gel synthesis route with low energy consumption was developed for geopolymer composites. The study focused on achieving >2.5 Al/Si molar ratios in the composites, which significantly improved the mechanical properties. The recycling of industrial waste materials, specifically the toxic red mud from aluminum fabrication, was also a key aspect. The structure of the composites was analyzed using Al-27 MAS NMR, XRD, and thermal analysis, confirming the presence of composite phases. The composites were characterized by their mechanical strength and water solubility.
Article
Materials Science, Composites
Xiaori Yang, Liangang Zheng, Long Chen, Fujun Xu
Summary: In this study, integrated 3D woven spacer composites (3DWSC) with double-layer cores assembled at different height combinations were designed and prepared to improve their anti-impact property. The results showed that the 3DWSC-4+8 combination had the highest contact force value and residual compressive strength after impact compared to single-layer 3DWSC. Moreover, SEM images revealed exceptional mechanical stability of the as-prepared double-layer 3DWSC with no fiber breakage and delamination. This work provides a reference for the design and fabrication of multi-layer 3DWSC, a promising material in high-performance composites.
POLYMER COMPOSITES
(2023)
Article
Engineering, Multidisciplinary
Kangyi Lu, Zihan Wang, Gang Li, Ruoqian Jiang, Gang Sui, Xiaoping Yang, Jiangpeng Zhao
Summary: An epoxy matrix with a high elastic modulus is designed to fabricate carbon fiber composites with high longitudinal compressive strength. The relationship between the grafting chains on the silica surface and the interphase of the resin matrix is studied through molecular dynamic simulations and experiments. The enhanced modulus of the interphase leads to improved longitudinal compressive strength of carbon fiber composites.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Mechanics
Prosanta Biswas, Durbadal Mandal, Manas Kumar Mondal
Summary: Al-Mg2Si composites were developed using gravity die-casting techniques. The influence of Mg2Si reinforcement concentration on the strength, micromechanics, and failure initiation of the AlMg2Si composites under compression was studied. The compressive strength and brittle fracture of the Al-Mg2Si composite increase, while the strain decreases with higher Mg2Si concentration. The eutectic and primary Mg2Si phase sharp corners and narrow sections serve as fracture initiation sites, while the Al phase nearby the eutectic and Mg2Si phase sharp corners, as well as the narrow Al phase regions between two Mg2Si islands, act as void initiation sites in the composites under compression.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Polymer Science
Se-Jin Choi, Sung-Ho Bae, Hoe Young Choi, Haye Min Ko
Summary: This study investigated the feasibility of using a chitosan-based polymer (CBP) as a sustainable material in cement mortar. The results showed that the CBP enhanced the compressive strength and tensile strength of the mortar, except when a ferronickel slag aggregate was used. Additionally, the CBP reduced the total charge passed through the mortar mixes and improved chloride-ion penetration resistance when a steel slag aggregate was used.
Article
Construction & Building Technology
Nan Zhao, Sheliang Wang, Xiaoyi Quan, Kangning Liu, Jin Xu, Fan Xu
Summary: This study investigates the performance of PVA fiber reinforced cementitious composites subjected to the combined action of sulphate and wet/dry cycles in a tidal environment. Results show that the durability properties decrease with the increase of fly ash and bentonite in Na2SO4(aq), while achieving the highest durability in water. The activity of the acoustic emission signal decreases continuously with the rise of fly ash and bentonite content, with small pores gradually connecting to form large pores during wet and dry cycles.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Toko Tokunaga, Koji Hagihara, Michiaki Yamasaki, Tsuyoshi Mayama, Kazuki Yamamoto, Hiroki Narimoto, Taiki Kida, Yoshihito Kawamura, Takayoshi Nakano
Summary: The variation in the mechanical properties with the volume fraction of the long-period stacking ordered (LPSO) phase in directionally solidified (DS) Mg/LPSO two-phase alloys was examined. Unexpectedly, the highest strength was obtained in alloys with 61-86 vol.% of the LPSO phase. Microstructural control and the presence of magnesium in the LPSO phase were found to enhance the "kink-band strengthening".
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
(2022)
Article
Engineering, Marine
Nan Zhao, Sheliang Wang, Xiaoyi Quan, Fan Xu, Kangning Liu, Yang Liu
Summary: The durability performance of polyvinyl alcohol fiber reinforced geopolymer composites is affected by the addition of fly ash and bentonite in a marine environment, with the best performance observed when the ratio of fly ash to cement is 1.8 in water. Acoustic emission characteristics closely correlate with damage development and stress-strain curve, showing distinct stages of initial, stable expansion, and unstable expansion. Increasing the fly ash and bentonite addition reduces the intensity and density of acoustic emission signals, leading to more uniform signal distribution.