Article
Materials Science, Multidisciplinary
Huan Sheng Lai, Rongcheng Wang, Yuntao Zhong, Peinan Du, Jinquan Guo, Qifei Huang
Summary: A small punch testing (SPT) method was established to investigate the circumferential tensile behavior of nuclear fuel cladding tubes. The proposed method accurately determined the yield stress and ultimate tensile stress of the tubes.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Engineering, Mechanical
Zao He, Hao Zhu, Yumei Hu
Summary: The study proposed an improved shear modified GTN model for predicting ductile fracture of materials under different stress states, and validated the accuracy of the model and feasibility of the damage parameters identification method through FE analysis.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Engineering, Geological
Jie Hu, Mingyang Wang, Xiaoli Rong, Xintong Wang, Ziming Xiong, Shaoshuai Shi
Summary: This study develops a new shear test apparatus to investigate the tensile-shear failure of jointed rock mass and compare it to compressive-shear failure. The rock specimens are monitored using various equipment to track stress, acoustic emission (AE) signal, temperature, and deformation. The results show that tensile-shear failure has different stress curves, multiple stress peaks, and a large crack opening, while compressive-shear failure has a higher strength but fewer AE counts. The findings contribute to a better understanding of the failure process of jointed rock mass under different shear stresses.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Materials Science, Characterization & Testing
Yi Zhang, Pin Chang, Liang Qiao, Junming Fan, Shifeng Xue, Bo Zhou
Summary: This paper introduces a new approach to estimate the tensile yield stress of HDPE materials using punch tests. Linear correlations between the maximum punch load and the indenter diameter are established, showing better prediction results compared to the correlation based on the variation of square indenter diameter. The proposed approach demonstrates good agreement with results from tensile tests, suggesting its applicability for estimating mechanical properties based on punch tests.
Article
Materials Science, Composites
Shuhua Zhu, Yuequan Wang, Long Zhou, Wentao Yi, Li Hu, Jian Liu, Xinran Kang, Hongshuang Li
Summary: A multi-functional composite sandwich panel was developed with a hybrid facesheet consisting of a quartz fiber reinforced plastic (QFRP) laminate and two copper layers, while the other facesheet was made of QFRP laminate. The effects of the hybrid facesheet on the mechanical characterizations of the sandwich panel were investigated through four mechanical performance tests. The experimental results showed that the sandwich panel with copper layers had lower mechanical performances compared to the sandwich panel without copper layers, with decreases in flatwise tensile strength, edgewise compressive strength, shear strength from three-point bending test, and shear strength from tensile plate shear test.
POLYMER COMPOSITES
(2023)
Article
Construction & Building Technology
Gang Peng, Ditao Niu, Xiaopeng Hu, Baoxue Pan, Shuai Zhong
Summary: The experimental study investigated the interfacial bond strength between cementitious grout and normal concrete substrate through slant shear tests and splitting tensile tests. The effects of concrete substrate strength, surface roughness, and type of cementitious grout on the bond strength were discussed, with the highest bond strength observed in specimens prepared using CGM-270 overlays. Empirical models for the bond strength were proposed, establishing a linear correlation between slant shear bond strength and splitting tensile bond strength.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Environmental
Tiecheng Sun, Xiaojing Gao, Yiming Liao, Wuqing Feng
Summary: The mechanical behavior of the soil-structure interface is crucial in determining the freezing behaviors of pile foundations in cold regions. Moisture content and temperature significantly affect shear and tensile strength, with little impact from dry density. Under the same conditions, tensile strength exceeding 100 kPa results in significantly greater tensile strength of the contact surface compared to shear strength, with an exponential relationship between the two.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Civil
Peng Pan, Zhizhou He, Haishen Wang, Yingjie Kang
Summary: A C-shaped glass-fiber-reinforced polymer (GFRP) connector was proposed and experimentally investigated for panels, showing large stiffness and bearing capacity for sufficient connection with high thickness insulation layers. Shear, tensile, and compression tests were conducted to quantify connector performance under different loading conditions, with length and loading direction as main parameters investigated. Results indicated different failure modes for connectors with different lengths and bending directions, with equations derived to predict system damage mode. Tensile and compression testing revealed an anchor failure mode related to anchorage rebars and concrete, showing capability to resist force and displacement of panels with thick insulation layers.
ENGINEERING STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Nina Graupner, Jorg Muessig
Summary: The study found that different test methods led to varying trends in ILSS depending on the fiber mass fraction and fiber fineness. IFSS decreased with higher fiber mass fractions and diameters, while ILSS showed different trends with different test methods. The influence of fiber fineness on ILSS was not statistically proven.
FRONTIERS IN MATERIALS
(2022)
Article
Engineering, Geological
Shucai Li, Jie Hu, Florian Amann, Liping Li, Hongliang Liu, Shaoshuai Shi, Pooya Hamdi
Summary: The paper introduces a new rock testing system that can simulate complex tensile-compressive-shear stress states. The system allows for laboratory tests under various failure modes and provides valuable information on failure characteristics.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2022)
Article
Engineering, Mechanical
Jinwei Fu, Vahab Sarfarazi, Hadi Haeri, Armin Shahbazian, Mohammad Fatehi Marji, Yibing Yu
Summary: This paper studied the specification of tensile crack growth under punch shear test and compared the direct and indirect tensile strength of gypsum and concrete. The results showed that the indirect tensile strength was higher than the directly measured strength in the laboratory. The concentration of tensile force varied depending on the notch length and joint length, with longer joints resulting in lower tensile values and shorter ligament lengths increasing the tensile strength.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Chemistry, Physical
Wei Pan, Jianwei Yue, Xue Yang, Zifa Wang
Summary: Due to high groundwater levels and salt content in the lower reaches of the Yellow River in Kaifeng, the city walls are prone to cracking, peeling, and efflorescence. To mitigate deterioration, lime and waterproof materials were used to reinforce the earthen sites, improving shear strength and reducing water absorption rates of the soil. The chemical reactions of the materials filled micro-pores and cracks between soil particles, enhancing the cohesion and stability of the imitation site soil.
Article
Construction & Building Technology
Kiang Hwee Tan, Joost Walraven, Steffen Grunewald, John Rovers, Bogdan Cotovanu
Summary: A high performance fibre concrete with a cylinder strength of about 80 MPa was developed and tested both under laboratory and site conditions. It was shown that the same relations can be obtained by using simple conversion factors, providing useful information for quality assessment of fibre reinforced concrete structures.
CEMENT & CONCRETE COMPOSITES
(2021)
Article
Engineering, Geological
M. Jarrahi, G. Bloecher, C. Kluge, H. M. Hollaender
Summary: A variational phase-field approach was used to model the inelastic behavior of granite rock in a punch through shear test, showing good agreement with experimental results for a critical energy release rate of G(c) = 600N/m. The numerical model was able to reproduce the fracture patterns of Mode I and Mode II, with the granite sample's fracture toughness for Mode II calculated to be 4.85 MPa root m at no confining pressure.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Biochemistry & Molecular Biology
Dora Balazs, Tamas Marik, Andras Szekeres, Csaba Vagvolgyi, Laszlo Kredics, Chetna Tyagi
Summary: This study investigated the production of peptaibols by various Trichoderma strains and their correlation with structure-activity relationships. The results showed that T. longibrachiatum f. bissettii SZMC 12546 exerted the lowest minimum inhibitory concentrations (MIC) against Gram-positive bacteria and also inhibited the plant pathogenic Gram-negative Rhizobium radiobacter. Molecular dynamics simulations revealed that the folding dynamics of Group A peptaibols were more restricted and had well-folded helical conformations, which may contribute to their bioactivity against bacteria.
COMPUTATIONAL AND STRUCTURAL BIOTECHNOLOGY JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Liuming Wei, Jingwen Li, Yonggang Li, Qirong Zheng, Fan Cheng, Chuanguo Zhang, Jingyu Li, Gaofeng Zhao, Zhi Zeng
Summary: This study investigates the influence of He-V complexes on H behaviors on different W surfaces using DFT calculations. The results show that H dissolution is most difficult but H trapping is easiest on the W (110) surface, while the opposite is true on the W (111) surface. Moreover, the presence of He-V complexes increases the difficulty of H diffusion from bulk to surface and desorption.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Yan Meng, Song Zeng, Chen Chen, Chaowen Zhu, Huahai Shen, Xiaosong Zhou, Xiaochun Han
Summary: The characteristics of magnetron sputtered Cr coatings vary with different temperature, bias voltage, and pressure. Coatings with random orientation, good crystallinity, and small grain size exhibit favorable oxidation behavior, while coatings with strong (200) texture, poor crystallinity, and large grains have many intrinsic defects that are detrimental to the protection property of the Cr coatings.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Xinyuan Xu, Zefeng Yu, Wei-Ying Chen, Aiping Chen, Arthur Motta, Xing Wang
Summary: This study presents an automated approach for characterizing grain morphology in TEM images recorded during ion irradiation. By combining a machine learning model and a computer vision algorithm, comparable results to human analysis can be achieved with significantly reduced analysis time. Researchers can train their own models following the procedures described in this study to automate grain morphology analysis of their own TEM images.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Shihao Wu, Dong Wang, Yapei Zhang, Koji Okamoto, Marco Pellegrini, Wenxi Tian, Suizheng Qiu, G. H. Su
Summary: The oxidation and degradation mechanisms of Cr coating on Zr alloy cladding under high temperature steam atmosphere are summarized, and a mathematical analysis model is established to predict the changes in coating thickness. The model is applied in the analysis of structure evolution under different conditions.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
V. Diaz-Mena, J. de Prado, M. Roldan, I. Izaguirre, M. Sanchez, M. Rieth, A. Urena
Summary: The brazeability of a cupronickel alloy was evaluated as a filler alloy for high-temperature joining of tungsten to steel. The study investigated the brazing conditions and the impact of the selected filler on the joint quality using numerical software. The results showed different metallurgical interactions and diffusion phenomena between the filler alloy and the base materials at different temperatures. The study emphasized the importance of selecting a suitable filler to mitigate residual stresses in the joints.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Pengcheng Zhu, Yajie Zhao, Yan-Ru Lin, Jean Henry, Steven J. Zinkle
Summary: This study investigates the effect of heavy-ion irradiation on radiation hardening in high-purity binary alloy Fe18Cr. Nanoindentation testing and high-quality TEM imaging were conducted to extract hardness and microstructure information. The strength factor was accurately calculated based on the detailed TEM characterization of irradiated microstructures, and a refined hardening superposition method was applied to quantify the mechanical properties of ion-irradiated materials.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Bin Wu, Haixia Ning, Hanzhen Zhu, Jianjun Chen, Kang Wang, Daiyu Zhang, Fu Wang, Qilong Liao
Summary: This study discusses the effects of ZrO2 and B2O3 on the phase composition and properties of SAP-based glass-ceramics. The results show that ZrO2 addition improves the formation of NZP phase while restricting the crystallization of AlPO4 phases. The correct ratios of ZrO2 and B2O3 allow only the formation of NZP phase within the SAP glass.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Hwasung Yeom, Greg Johnson, Benjamin Maier, Tyler Dabney, Kumar Sridharan
Summary: Cr-Nb bilayer coatings were developed using cold spray deposition to improve the limiting operational temperature of Cr-coated Zr-alloy system. The coatings exhibited outstanding oxidation resistance at high temperatures and formed continuous intermetallic compound layers at the interfaces.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Padhraic L. Mulligan, Andrew T. Nelson, Chad M. Parish, Patrick A. Champlin, Xiang Chen, Daniel Morrall, Jason M. Harp
Summary: Environmental barrier coatings are being developed to reduce oxidation and embrittlement in Zr-based materials. Chromium nitride is a candidate for this application, but understanding its impact on irradiation-induced creep and microstructure is critical.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Dexuan Yan, Xinlei Cao, Ke Shen
Summary: This study investigated the purification mechanism of polycrystalline graphite by comparing IG-11 graphite with IG-110 nuclear grade graphite. The analysis revealed that metallic impurities in IG-11 were primarily segregated within graphite porosities, while IG-110 demonstrated a significant reduction in impurities. This research contributes to the development of innovative graphite purification techniques for greater purity and stronger oxidation resistance.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Wei Xu, Wei Peng, Lei Shi, Qi Sun
Summary: This paper investigates the oxidation and shape evolution of matrix graphite in high temperature gas-cooled reactors during air-ingress accidents. A reaction kinetics model is established and computational fluid dynamics with a dynamic mesh method is used to simulate the oxidation process. The results show that the geometric shape of graphite changes significantly with increasing flow rate, and the graphite pebbles tend to form a structure with a narrow front and wide tail.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Allison Harward, Casey Elliott, Michael Shaltry, Krista Carlson, Tae-Sic Yoo, Guy Fredrickson, Michael Patterson, Michael F. Simpson
Summary: This paper investigates the hygroscopic properties of eutectic LiCl-KCl absorbed into zeolite-4A. The study finds that water absorption and corrosion worsen with increasing salt loading. It also suggests that the salt can be stored in a non-inert atmosphere for a certain period of time.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Takaaki Koyanagi, Xunxiang Hu, Christian M. Petrie, Gyanender Singh, Caen Ang, Christian P. Deck, Weon-Ju Kim, Daejong Kim, James Braun, Yutai Katoh
Summary: This study provides critical experimental data on the effects of irradiation on the hermeticity of SiC composite cladding, finding that irradiation can cause a decrease in hermeticity and cracking, and coating the outer surface can mitigate the cracking issue.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
S. Krat, A. Prishvitsyn, Yu. Gasparyan
Summary: This study proposes a probabilistic and diffusion-based model to describe the co-deposition of multiple hydrogen isotopes with slowly grown metal layers. The model calculates the relative concentrations of different hydrogen isotopes in the co-deposited metal layers. It is found that if hydrogen isotopes have different detrapping energies, only the isotope with the highest detrapping energy shows a monotonic decrease in concentration with deposition temperature. Furthermore, the study evaluates the uncertainty of tritium concentration in the co-deposited layer based on the uncertainty in detrapping energy of tritium and deuterium, predicting a >10% tritium concentration uncertainty for a 0.01 eV difference.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Tijo Vazhappilly, Arup Kumar Pathak
Summary: This study investigates the effect of Ce atom substitution in UO2 on its thermophysical properties using density functional theory. The results show that the Ce substitution levels and the oxidation state of Ce/U atoms strongly influence the band structure and specific heat capacity of the UO2 lattice. These findings provide important insights into the fuel properties of UO2 under reactor conditions.
JOURNAL OF NUCLEAR MATERIALS
(2024)