Review
Materials Science, Multidisciplinary
Yong-tao Gao, Tian-hua Wu, Yu Zhou
Summary: This review thoroughly discusses the application and development of three-dimensional printing technology in the field of rock mechanics, as well as the differences in mechanical performance of specimens printed with different materials, indicating the great potential of 3DP technology in the field of rock mechanics.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2021)
Article
Engineering, Geological
Man Huang, Chenjie Hong, Peng Sha, Shigui Du, Zhanyou Luo, Zhigang Tao
Summary: This study proposes a visualized approach to track joint surface morphology using three-dimensional laser scanning and 3D printing techniques. Transparent specimens created through 3D printing resin accurately reproduce the surface morphology of natural joints. The freezing method enhances the mechanical properties of the 3D printed specimens to accurately replicate the properties of hard rock. The use of a video camera with a CCD camera records the evolution of the damaged area of the joint surface during shearing test.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2023)
Article
Construction & Building Technology
Anne Linde van Overmeir, Branko Savija, Freek P. Bos, Erik Schlangen
Summary: This paper evaluates the effect of each successive phase of the printing process on the mechanical properties of strain-hardening cementitious composites (SHCC). The results indicate that flexural and tensile strength, as well as their associated deflection and strain, are strongly affected by the printing process, while density and compressive strength are not significantly influenced. Additionally, the pumping phase is identified as the primary phase influencing the mechanical properties during the printing process.
Article
Engineering, Civil
Erick Rogenes, Alessandra dos Santos Gomes, Marcio Muniz de Farias, Leandro Lima Rasmussen
Summary: In this study, the pseudo-discontinuum modeling technique known as the continuum Voronoi block model (CVBM) was used to simulate the behavior of hard-rock pillars under high field stresses. Numerical analysis of a hypothetical case and the Creighton mine pillar demonstrated that the CVBM can accurately capture the observed behavior, including convergence displacements and the formation of macro-fractures, intact rock slabs, and V-shaped notches parallel to excavation walls. These findings confirm the CVBM as a valuable tool for modeling intact rock pillars in deep underground mines.
Article
Materials Science, Multidisciplinary
Kai Zhang, Ke Zhang, Jinming Ye, Xianghua Liu, Wenchen Fan
Summary: This study investigates the mechanical properties of high-strength and high-brittleness rocks using 3D printing technology. By post-treating sand 3D printed rock-like specimens with phenolic resin and high-temperature baking, the mechanical properties of these specimens are improved. The microstructure analysis reveals that the enhanced mechanical properties are attributed to the improved micro-pore structure and bond strength between particles.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Geological
Shiming Mei, Xia-Ting Feng, Zhengwei Li, Chengxiang Yang, Jikai Gao
Summary: This paper presents a novel 3D printing technology for synthetic hard rock using self-developed equipment and method. By adding specific compounds and adjusting the material proportion, the appearance and mechanical properties of the printed samples can be controlled. This technology has great potential for various applications.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Shaoyun Chen, Yalu Duan, Wenqiang Hua, Qilang Lin, Bo Qu, Rui Wang, Yanyu Zheng, Xiaoying Liu, Wenjie Li, Dongxian Zhuo
Summary: In this study, acrylic liquid-crystal resin (ALCR) was synthesized using 4-hydroxybenzoate 4-carboxylic phenyl ester as the mesocrystalline unit. The structure, heat resistance, and liquid-crystal properties of the ALCR were systematically investigated. The results indicate that ALCR can effectively improve the mechanical properties of 3D-printed products.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Construction & Building Technology
A. L. van Overmeir, B. Savija, F. P. Bos, E. Schlangen
Summary: This paper investigates the influence of raw materials and additives on the mechanical properties of printable strain hardening cementitious composites (SHCC) for 3D printing. By improving on a previously developed mixture, two 3DP-SHCC mix designs with significant strain hardening capacity and good printability properties were obtained.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Adilet Zhakeyev, Fenella Walker, Mansour Abdulrhman, Jose Marques-Hueso
Summary: This study demonstrates the synergistic effect of silver ions to enhance the crosslinking of 3D printing photo polymers, enabling selective metallization of multi-material parts. By incorporating a ytterbium-thulium co-doped sodium yttrium fluoride phosphor into a photopolymer resin, voxel crosslinking in the centimeter scale depth is achieved using a low-cost NIR laser. The addition of Ag(I) ions enables faster curing speeds and the subsequent copper plating allows integration of metalized parts on different substrates.
Article
Chemistry, Physical
Kun Du, Songge Yang, Jian Zhou, Lichang Wang
Summary: It is important to study the evaluation indexes and classification criteria of the bursting liability of hard rocks for the prediction and prevention of rockbursts. In this study, the rockburst tendency was evaluated using the brittleness indicator (B2) and the strength decrease rate (SDR). The measuring methods and classification criteria were analyzed, and four grades of rockburst tendency were defined based on the test results.
Article
Engineering, Geological
G. Walton, S. Sinha
Summary: Pillars play a critical role in underground mining systems, with their mechanics depending on hardness and confinement. This study re-evaluates the pillar mechanics database, revealing a nonlinear relationship between pillar strength and UCS.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2021)
Review
Biochemistry & Molecular Biology
Zhouyuanye Wan, Hongjie Zhang, Meihong Niu, Yanzhu Guo, Haiming Li
Summary: With the increasing global population and economic development, the shortage of fossil resources has had serious negative impacts on the environment and sustainable development. However, 3D printing technology, as a more energy-efficient manufacturing method, can be used to produce low-carbon and environmentally friendly materials. Lignin, as a significant renewable biomass resource, has great potential in this field.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Green & Sustainable Science & Technology
Wei-Cheng Chao, Ying-Chih Liao
Summary: A new method was established to recycle photocured acrylic resins in 3D printed products. Discarded 3D-printed dental models were ground into micrometer-size recycled powder. The recycled resin can be printed into accurate models under low solid content, but higher solid content limits the amount of recovery. Further blending and de-aggregation make the recycled resins exhibit great suspension stability and low viscosity for fine DLP printing. The recycled-resin-printed samples showed excellent accuracy with low roughness.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Materials Science, Multidisciplinary
E. Carreno-Morelli, P. Alveen, S. Moseley, M. Rodriguez-Arbaizar, K. Cardoso
Summary: Cemented carbide parts manufactured by "Solvent on Granules 3D-Printing" show excellent physical properties and functionality, comparable to traditional parts, and have successfully undergone concrete drilling tests.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2021)
Article
Computer Science, Software Engineering
Xiang Li, Sara McMains
Summary: In this study, a new approach is proposed to automatically detect fiber-deficient areas in 3D printed FRP parts from microscope images, addressing the manual and inefficient quality inspection issue. The proposed algorithms efficiently exploit the typical characteristics of 3D printed FRP parts, providing robust handling of real-world inputs.
COMPUTATIONAL VISUAL MEDIA
(2023)
Article
Computer Science, Software Engineering
Yumeng Tan, Xupeng Fu, Jianbo Zhu, Lina Chen
Summary: In this study, a multi-scale three-dimensional convolutional neural network lung nodule detection method was proposed to accurately detect lung nodules and reduce false positives. The method achieved high sensitivity and low false positive rate, providing valuable theoretical reference for clinical medicine.
CONCURRENCY AND COMPUTATION-PRACTICE & EXPERIENCE
(2023)
Article
Engineering, Mechanical
Shijie Xie, Zhenyu Han, Tao Zhou
Summary: A damage constitutive relationship is established based on the generalized equivalent strain principle and the initial tangent modulus to reflect the initial damage recovery. A Weibull distribution-based model is also established to represent the deformation after the compaction point. The combination of these two constitutive models yields a piecewise expression of the complete stress-strain curve of rocks under uniaxial compression.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2023)
Article
Engineering, Geological
Zhenghu Zhang, Jianbo Zhu, Jianhui Deng
Summary: This article introduces seven methods for determining joint normal stiffness in rock mechanics and conducts laboratory tests and comparisons. The results show that Method I, IV, and VI are reliable and accurate methods. These findings are helpful in solving discontinuous rock mass problems.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2023)
Article
Engineering, Geological
Peiwang Cao, Tao Zhou, Jianbo Zhu
Summary: This study investigates the rate dependent behavior of mixed mode I/II fracture toughness in rock. Split Hopkinson pressure bar tests were performed on cracked sandstone specimens with different loading angles and strain rates. The results show that the peak load and peak strain increase with increasing strain rates while the influence of loading angle is almost negligible. Dynamic mode I and mode II stress intensity factors as well as effective fracture toughness increase rapidly with increasing strain rate before reaching a plateau. The findings of this study contribute to a better understanding of the rate effect of mixed mode I/II fracture and its micromechanism.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2023)
Article
Engineering, Mechanical
Jiaxin Wen, Lin He, Tao Zhou, Pengfei Tian, Tian Zhou, Zhiguo Feng
Summary: This study fills the research gap on the effect of grain size on machined surface integrity and burr formation by developing a model based on dislocation density and incorporating it into ABAQUS. The experimental results show that increasing the grain size reduces the cutting force but increases the burr size. This study provides a new theoretical basis for burr control and surface integrity improvement.
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Geological
Hui Yang, Huan-Feng Duan, Jianbo Zhu
Summary: This study conducted ultrasonic tests on kaolinite- and bentonite-filled rock joints to investigate the effects of clay minerals and water saturation on elastic P-wave behaviors. The results showed that the water saturation and mineralogical compositions of the infilling have combined effects on P-wave signatures across single rock joints filled with clayey soils. The difference in heterogeneity saturation due to clay hydration is the main reason for the discrepancies in saturation-dependent P-wave attributes between kaolinite- and bentonite-filled rock joints. The findings contribute to a better understanding of wave propagation and attenuation across rock joints filled with fluid-saturated clayey soils.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2023)
Article
Engineering, Geological
Jiadong Qiu, Heping Xie, Jianbo Zhu, Jun Wang, Jianhui Deng
Summary: This study investigates the influence of joint distribution on the dynamic response of underground caverns through a series of experiments and numerical simulations. The results show that the joint has limited impact on the cavern when the dip angle is 0 degrees, 90 degrees, and 180 degrees, but becomes significant at 56 degrees and 134 degrees. Different joint distributions can also cause four types of rockbursts in the cavern, and the displacement changes of surrounding rocks can indicate the stability of the cavern.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2023)
Article
Engineering, Geological
Xuehan Yin, Tao Zhou, Changtai Zhou, Heping Xie, Jianbo Zhu
Summary: The effect of loading rate and normal stress on shear responses of rock materials was investigated using a bonded-particle model. A novel calibration methodology for direct shear test was proposed to effectively derive microscopic parameters and obtain macroscopic properties. Both normal stress and loading rate have a positive influence on shear strength, with normal stress having a greater impact.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Engineering, Electrical & Electronic
Shan Luo, Tao Zhou, Yong Xiao, Rongping Lin, Yao Yan
Summary: Due to limited spectrum resources, unmanned aerial vehicles (UAVs) can communicate through flexible spectrum sharing. Spectrum state prediction is necessary for UAVs to avoid interfering with primary users. Additionally, prediction of spectrum status duration is needed since primary users may access the spectrum immediately after UAVs. However, existing methods for duration prediction may not be suitable for UAV communications. Therefore, a new prediction approach combining non-linear homotopy estimation and NSHMM is proposed in this paper, which proves to efficiently predict the spectrum status duration of the next location based on experimental results.
Article
Energy & Fuels
Erkang Zhou, Tianqi Zhai, Jianbo Zhu
Summary: Understanding wave propagation behavior in rock masses under different temperatures and geological conditions is crucial for evaluating the stability and safety of deep rock engineering projects. This study investigated the response and mechanism of ultrasonic waves in granites after thermal treatment. The results showed that heating temperature and grain size had a combined impact on wave propagation in the tested granites. The crack evolution was identified as the main reason for the seismic response of thermally treated granites. A damage factor and optimal wave indicators were proposed to evaluate the deterioration of granites at different damage stages.
GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Chang Che, Tao Zhou, Ming Yu
Summary: This paper presents a fourth-order combline filter with a screw-free tuning method to increase power capability. The resonant columns in the filter are covered with Teflon spheres to meet the power demands, and the top walls of the cavities are designed as hemispheres to maintain a uniform distance from the resonant columns, preventing breakdowns caused by high voltage. Additionally, mechanical deformation is introduced as a post-process tuning method, offering better performance than traditional tuning screws. The simulation and measurement results confirm the effectiveness of the proposed filter and tuning method.
2023 IEEE MTT-S INTERNATIONAL CONFERENCE ON NUMERICAL ELECTROMAGNETIC AND MULTIPHYSICS MODELING AND OPTIMIZATION, NEMO
(2023)
Article
Engineering, Multidisciplinary
Hao Quan, Wei Zhang, Wenjie Zhang, Zixiong Li, Tao Zhou
Summary: This paper proposes a new interval prediction method based on skip-GRU network and block bootstrap for short-term wind power prediction. Multiple subsets are generated using different bootstrap methods and skip-GRU models are trained with these subsets. The results of case studies demonstrate that the proposed method can obtain satisfactory prediction intervals and has higher overall quality compared to other bootstrap methods and benchmark models.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2023)
Article
Construction & Building Technology
Huayong Lv, Fei Liu, Xu Gao, Tao Zhou, Xiang Yuan
Summary: The caving property of top coal is crucial for successful top coal caving mining. The influence law of cyclic loading and unloading of hydraulic support on top coal caving plays a significant role in improving the recovery rate. This study simulated the dynamic evolution of top coal cracks under multi-cycle action and quantitatively analyzed the crack parameters. Results showed that top coal cracks could be categorized into horizontal and vertical cracks under cyclic loading and unloading. Increasing the number of cycles led to decreased support load, increased crack fractal dimension, number, and total length, resulting in improved top coal caving. Fractal dimension, total crack length, and crack rate first increased rapidly and then slowly with multi-cycle loading and unloading. The total length of top coal cracks and crack rate demonstrated a linear growth with changing fractal dimension. Multi-cycle loading and unloading can effectively enhance top coal caving and increase coal resource recovery rate.
STEEL AND COMPOSITE STRUCTURES
(2023)
Proceedings Paper
Computer Science, Hardware & Architecture
Wenliang Zhang, Tao Zhou, Liu Liu
Summary: This paper investigates the radio propagation measurements and characterization of the narrow-beam channel in typical vehicle-to-infrastructure (V2I) scenarios. The empirical models are established for the narrow-beam channel modeling, which are helpful for the planning and optimization of 5G-V2X communication systems.
2023 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE, WCNC
(2023)
Article
Engineering, Multidisciplinary
Tao Zhou, Rong-zheng Fang, Di Jia, Pei Yang, Zhi-ying Ren, Hong-bai Bai
Summary: In this study, virtual manufacturing technology was used to restore the 3D model of EPMWM and conduct thermal analysis to explore its thermal response mechanism. The spiral units containing unique structural information were extracted and counted, and a thermal resistance network was constructed to accurately predict the effective thermal conductivity of EPMWM. The experimental results show that the effective thermal conductivity of EPMWM increases with increasing temperature or decreasing density.
DEFENCE TECHNOLOGY
(2023)