Article
Engineering, Multidisciplinary
Yu Duan, Xiaopeng Chen, Biao Yin, Xianhang Zhao, Zhenqiang Zhao, Bing Hou, Yulong Li
Summary: This study experimentally investigates the effect of defects on foam materials and proposes a statistical model that considers the influence of defects. The results show that the defect of missing cell-wall greatly affects the compressive behaviors of foams, while the defect of missing cell-core has a negligible influence on mechanical properties.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Jin-Kui Meng, Li Liu, Jian-Tang Jiang, Guo Huang, Liang Zhen
Summary: The fracture behaviors and mechanisms of metallic materials under biaxial stress were investigated. It was found that under quasi-uniaxial tension, normal fracture occurred, while under equi-biaxial tension, both normal and secondary shear fractures were observed. The lower strain hardening ability in the rolling direction introduced large shear stress in the 45 degrees direction, contributing significantly to the secondary shear fracture. An anisotropy parameter K was proposed for the first time to predict the fracture path.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Construction & Building Technology
Long Yuan, Jingping Qiu, Zhenbang Guo, Shiyu Zhang, Xiaojun Wan, Xiaogang Sun
Summary: Blast furnace slag (BFS) is used as a cement replacement material to improve microstructure and mechanical properties. Optimizing the content of BFS is crucial for maintaining the composite's mechanical properties. Modelling the microstructure of BFS-cement based material and conducting simulations and experiments help understand the material's behavior and achieve optimal mechanical properties.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Zhangyu Wu, Jinhua Zhang, Hongfa Yu, Haiyan Ma, Hao Wang, Guijia Zhang, Bing Yan
Summary: This paper presents an experimental and numerical study on the compressive behaviors of a new CFRCC. The effects of carbon fiber content and strain rate on the compressive performance of CFRCC are investigated. The results show that the cracking and failure modes of CFRCC are significantly influenced by carbon fibers. With the increase of fiber content, the dynamic peak stress of CFRCC increases and the peak strain decreases. Additionally, CFRCC exhibits evident strain-rate hardening effect on the initial elastic modulus and the peak stress. The mesoscale modeling approach is validated and proved to be feasible in simulating and investigating the dynamic behaviors of CFRCC.
CEMENT & CONCRETE COMPOSITES
(2022)
Article
Materials Science, Ceramics
Tianbao Cheng
Summary: This study presents a method for testing the mechanical properties of materials at ultra-high temperatures in an inert atmosphere, focusing on the flexural properties of 2D plain-weave C/SiC up to 2600 degrees Celsius. The experimental results provide significant insights into the mechanical behaviors of C/SiC under ultra-high-temperature extreme environment conditions.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
Wioleta Iskra-Kozak, Janusz Konkol
Summary: This article explores the effects of aluminum nanoxide on the physical, strength, and structural properties of cement mortars. It is found that the addition of 1% aluminum nanoxide leads to a significant increase in compressive strength and influences the fractal dimensions of the fracture surface profile lines.
Article
Chemistry, Multidisciplinary
Chae-Young Lee, Sujin Lee, Jang-Hoon Ha, Jongman Lee, In-Hyuck Song, Kyoung-Seok Moon
Summary: Porous ceramics with high chemical and thermal stability, especially reticulated porous ceramics, exhibit high porosity and good permeability. By adjusting processing conditions, the compressive strength of reticulated porous ZTA can be improved.
APPLIED SCIENCES-BASEL
(2021)
Article
Construction & Building Technology
Soheil Ghadr, Chih-Hsuan Liu, Pattela Mrudunayani, Ching Hung
Summary: This study found that the treatment with NS can significantly improve the shrinkage and compressibility properties of mudstone soil, with the best treatment effect observed at 0.3% NS.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
M. M. Ahmed, K. A. M. El-Naggar, Dalia Tarek, Ayman Ragab, Hesham Sameh, Abdullah M. Zeyad, Bassam A. Tayeh, Ibrahim M. Maafa, Ayman Yousef
Summary: The study focuses on the preparation of thermal insulation geopolymer bricks using ferrosilicon slag and alumina waste. Different NaOH concentrations and curing times were tested to determine the best compressive strength, with results showing that increasing alumina content enhances geopolymer properties but reduces compressive strength. A Si/Al ratio of 1 exhibited the highest compressive strength among different ratios after 28 days of curing at 8 M NaOH.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2021)
Article
Materials Science, Textiles
Yu Wang, Yanan Jiao, Ning Wu, Junbo Xie, Li Chen, Peng Wang
Summary: The mechanical properties of yarns significantly impact the performance of fiber-reinforced composite materials. This study proposes a quasi-fiber scale virtual modeling method to predict the mechanical behavior of twisted yarns. By establishing a stochastic properties model and determining modeling parameters, a balance between modeling precision and computational efficiency can be achieved.
JOURNAL OF INDUSTRIAL TEXTILES
(2022)
Article
Biochemistry & Molecular Biology
Zhengwei Zhang, Jin Kang, Xiaodong Li, Ping Li, Yali Du, Yufan Qin, Ningyi Li, Jiebin Li
Summary: The DFT method is used to investigate the adsorption and reaction behaviors of HC2O4-, H2PO4-, HSO4-, and H2O on neutral and anodic aluminum slabs. The key step in the formation of anodic alumina is the successive extraction of two H atoms from adsorbed H2O on the anodic aluminum slabs by the three acid radicals. The dehydrogenation reaction is primarily governed by the Coulombic interaction between O and H, which belong to acid radicals and the adsorbed H2O or OH, respectively, rather than by the interaction of electronic orbits located on the two types of atoms. The experimental results of anodic polarization of aluminum confirm the calculated results well.
Article
Engineering, Mechanical
Linwei Li, Qiaofeng Zheng, Baoguo Han, Jinping Ou
Summary: This study investigates the fatigue behaviors of multi-layer graphene reinforcing reactive powder concrete under compressive loads. Experimental results show that the incorporation of graphene significantly reduces internal weakness of the concrete composites, leading to improvements in fatigue life, energy absorption, and damage index. Through microstructural analysis, it is found that graphene helps to stabilize the chemical composition and reduce thermal stress inside the concrete composites, delaying fatigue failure and increasing fatigue reliability.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Engineering, Mechanical
Kai Song, Kaimeng Wang, Lei Zhao, Lianyong Xu, Yongdian Han, Kangda Hao
Summary: In this study, the stress-strain responses of G115 martensitic steel, Inconel alloy 750H, and 316H austenitic steel at elevated temperatures were investigated via low cycle fatigue tests. The effects of microstructure on stress-strain responses were discussed, and a unified elastic-plastic framework was established. The results showed good consistencies between experimental and predicted results, indicating the strong capability of the model to integrate different behaviors into a constitutive model.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Chemistry, Multidisciplinary
Kevin M. Roccapriore, Ondrej Dyck, Mark P. Oxley, Maxim Ziatdinov, Sergei Kalinin
Summary: Automated experiments in 4D scanning transmission electron microscopy (STEM) are used for rapid discovery of local structures, symmetry-breaking distortions, and internal electric and magnetic fields in complex materials. Deep kernel learning enables active exploration of the relationship between local structure and 4D-STEM-based descriptors. Experimental verification includes the use of graphene and a two-dimensional van der Waals material, MnPS3.
Article
Chemistry, Multidisciplinary
Edwin B. Clatworthy, Simona Moldovan, Kalthoum Nakouri, Stoyan P. Gramatikov, Francesco Dalena, Marco Daturi, Petko St. Petkov, Georgi N. Vayssilov, Svetlana Mintova
Summary: This study directly visualizes the structural flexibility of a high-aluminum nano-sized RHO zeolite using in situ TEM for the first time. Variable temperature experiments observe the physical expansion of nanocrystals in response to changes in guest-molecule chemistry and temperature. Operando FTIR spectroscopy complements the observations and verifies the nature of adsorbed CO2 and structural changes at high temperatures. Quantum chemical modeling substantiates the effect of cation mobility and CO2 on the flexibility behavior of the structure. The results demonstrate the combined influences of temperature and CO2 on the structural flexibility consistent with experimental observations.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
