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Electrochemo-Mechanical Degradation and Failure of Active Particles in High Energy Density Batteries: A Review.
Small
January 2025
Department of Mechanical Engineering, University of Delaware, Newark, DE, 19716, USA.
Failure of the active particles is inherently electrochemo-mechanics dominated. This review comprehensively examines the electrochemo-mechanical degradation and failure mechanisms of active particles in high-energy density lithium-ion batteries. The study delves into the growth of passivating layers, such as the solid electrolyte interphase (SEI), and their impact on battery performance.
View Article and Find Full Text PDFDamage analysis and grading control technology of surrounding rock in high geo-stress roadway.
Sci Rep
January 2025
Coal Mine Safety Mining Equipment Innovation Center of Anhui Province, Anhui University of Science and Technology, Huainan, 232001, China.
To investigate the failure mechanism and establish stability control methods for surrounding rock in high geo-stress roadways, this study incorporated the brittle failure characteristics of the surrounding rock mass into a unified strength criterion, developing an elastic-plastic theoretical model to represent rock damage and fracture. Using this model, analytical expressions for the damage rupture radius and stress field distribution are derived, leading to the proposal of a grading control method. The analysis of calculation examples reveals that an increase in stress, damage degree, and the brittleness coefficient of the rock mass results in the expansion of both the plastic damage and damage residual zones.
View Article and Find Full Text PDFStudy on the Dynamic Fracture Properties of Defective Basalt Fiber Concrete Materials Under a Freeze-Thaw Environment.
Materials (Basel)
December 2024
Department of Mining Engineering, School of Environment and Resources, Southwest University of Science and Technology, Mianyang 621010, China.
This study examines the crack resistance of basalt-fiber-reinforced concrete (BFRC) materials subjected to freeze-thaw cycles (FTCs). We utilized a φ50 mm Split Hopkinson Pressure Bar (SHPB) apparatus alongside numerical simulations to carry out impact compression tests at a velocity of 5 m/s on BFRC specimens that experienced 0, 10, 20, and 30 FTCs. Additionally, we investigated the effects of basalt fiber (BF) orientation position and length on stress intensity factors.
View Article and Find Full Text PDFSize Effect on Shear Behaviors of 3D-Printed Soft Rock-like Materials Under Different Shear Velocities.
Materials (Basel)
December 2024
College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
The shear failure of rock masses is one of the primary causes of underground engineering instability. The shear mechanical behavior of rocks at different sizes is of great significance for studying the shear failure pattern of engineering rock masses. However, due to the presence of various joints and defects in natural rocks, the obtained rock specimens exhibit significant discreteness, making it difficult to customize specimen sizes for size effect studies.
View Article and Find Full Text PDFStudy on Fatigue Behavior and Fracture Mechanism of LMD Ti-6.5Al-3.5Mo-1.5Zr-0.3Si Alloy Based on Microstructure.
Materials (Basel)
December 2024
State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, No. 127, Youyi Road (West), Xi'an 710072, China.
This study explores the fatigue behavior and fracture mechanisms of TC11 titanium alloy formed by laser metal deposition (LMD) and subjected to double annealing. The research focuses on how the alloy's unique microstructure, consisting of alternating equiaxed and columnar crystals, influences its fatigue performance. The microstructure's basket-like α' phase, made up of both plate-shaped and needle-like structures, leads to variations in crack growth behavior, as shown in the relationship between the crack growth rate and the stress intensity.
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