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The Overload Effect on the Crack Tip Damage Mechanism in a 7075 Aluminum Alloy.
Materials (Basel)
August 2024
Beibu Gulf Key Laboratory of Ocean Engineering Equipment and Technology, Guangxi Key Laboratory of Ocean Engineering Equipment and Technology, College of Mechanical and Marine Engineering, Beibu Gulf University, Qinzhou 535011, China.
In the serviced components of a 7075 aluminum alloy, the propagation of fatigue crack can be retarded because of the overload effect; however, the corresponding retardation mechanisms are complex. To provide further insights into the retardation mechanisms of 7075 aluminum alloys, this study addresses the crack tip damage response of a cracked 7075 aluminum alloy under an overload effect. Based on the dual-scale modeling approach and the damage-coupled crystal plasticity model, the effect of the microstructure of a 7075 aluminum alloy on the damage behavior ahead of the crack tip under an overload was studied.
View Article and Find Full Text PDFPiezoelectric Micromachined Microphone with High Acoustic Overload Point and with Electrically Controlled Sensitivity.
Micromachines (Basel)
July 2024
University Grenoble Alpes, CNRS, Grenoble INP, TIMA, 46 Av. Félix Viallet, F-38000 Grenoble, France.
Currently, the most advanced micromachined microphones on the market are based on a capacitive coupling principle. Capacitive micro-electromechanical-system-based (MEMS) microphones resemble their millimetric counterparts, both in function and in performance. The most advanced MEMS microphones reached a competitive level compared to commonly used measuring microphones in most of the key performance parameters except the acoustic overload point (AOP).
View Article and Find Full Text PDFVaccine Therapy for Heart Failure Targeting the Inflammatory Cytokine Igfbp7.
Circulation
July 2024
Frontier Cardiovascular Science (M.Katoh, T.K., S.I., S.N., I.K.), The University of Tokyo, Japan.
Background: The heart comprises many types of cells such as cardiomyocytes, endothelial cells (ECs), fibroblasts, smooth muscle cells, pericytes, and blood cells. Every cell type responds to various stressors (eg, hemodynamic overload and ischemia) and changes its properties and interrelationships among cells. To date, heart failure research has focused mainly on cardiomyocytes; however, other types of cells and their cell-to-cell interactions might also be important in the pathogenesis of heart failure.
View Article and Find Full Text PDFThe landlocked Atlantic salmon population "bleke" faces extinction due to environmental acidification (EA) and hydropower expansion in the Norwegian river Otra. Despite of restoration, unexpected mortality has been reported for this population, possibly due to gas bubble trauma (GBT) from gas supersaturation (GSS) downstream of hydroelectric plants, or EA induced aluminum toxicity. In this study, we applied the allostasis concept to investigate interactions between EA and GBT.
View Article and Find Full Text PDFCase report: Combination of veno-arterial extracorporeal membrane oxygenation and intra-aortic balloon pump in a young male patient with refractory cardiogenic shock due to aluminum phosphide poisoning.
Front Cardiovasc Med
September 2023
Cardiology Department, Moscow State University of Medicine and Dentistry, Moscow, Russia.
Background: Acute toxic myocardial damage may be accompanied by the development of cardiogenic shock (CS), the mortality from which is still unacceptably high. Since there is no specific antidote for many types of toxins, treatment of such patients includes various measures of hemodynamic and respiratory support. The paper presents a case of refractory CS due to possible aluminum phosphide (AP) poisoning.
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