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Biological structures possess excellent damage tolerance, which makes them attractive for ballistic protection applications. This paper develops a finite element modelling framework to investigate the performance of several biological structures that are most relevant for ballistic protection, including nacre, conch, fish scales, and crustacean exoskeleton. Finite element simulations were conducted to determine the geometric parameters of the bio-inspired structures that can survive projectile impact. The performances of the bio-inspired panels were benchmarked against a monolithic panel with the same 4.5 mm overall thickness and projectile impact condition. It was found that the biomimetic panels that were considered possessed better multi-hit resistant capabilities compared to the selected monolithic panel. Certain configurations arrested a fragment simulating projectile with an initial impact velocity of 500 m/s, which was similar to the performance of the monolithic panel.
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http://dx.doi.org/10.3390/biomimetics8020195 | DOI Listing |
Sci Rep
July 2025
Yulin Yuyang Natural Resources Investigation and Planning Center, Yulin, 719000, China.
In response to the challenges of prolonged construction cycles, high costs, and environmental degradation associated with coal-pressed village reconstruction projects in northern Shaanxi mining areas. The study proposes a monolithic assembled concrete shear wall structure with non-connected vertical distribution reinforcement (SGBL monolithic assembly shear wall structure). The structural system employs non-continuous reinforcement in prefabricated wall elements, using extrusion grouting connections combined with cast-in-place boundary members, optimizing construction efficiency and enhancing environmental sustainability.
View Article and Find Full Text PDFEJNMMI Phys
May 2025
Department of Electronics and Information Systems, Medical Image and Signal Processing, Ghent University, Ghent, Belgium.
Background: The combination of longer axial field-of-view (AFOV) and time-of-flight positron emission tomography (PET) has significantly improved system sensitivity and, as a result, image quality. This study investigates a cost-effective extended AFOV PET system design using monolithic LYSO detectors with depth-of-interaction capabilities. These detectors, arranged in a vertical flat-panel geometry and positioned closer to the patient, enable superior spatial resolution while maintaining a compact and affordable system design.
View Article and Find Full Text PDFJ Chem Phys
February 2025
School of Microelectronics, Fudan University, Shanghai 200433, China.
Small
March 2025
State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China.
Perovskites nanocrystals (PNCs) have garnered significant research interest in X-ray detection due to their strong X-ray absorption capability, and unique advantages in large area and thick film deposition that result from the decoupling of perovskite crystallization from film formation. However, traditional long-chain ligands used in PNCs, such as oleic acid and oleyl amine, suffer from poor conductivity and susceptibility to detachment, which limits the performance of X-ray detectors based on them. In this study, a strategy is proposed to partially replace long-chain ligands with short-chain counterparts like phenethylammoniumbromide (PEABr) and CFPEABr, during the synthesis of CsPbBr PNCs.
View Article and Find Full Text PDFMaterials (Basel)
December 2024
University of Coimbra, CEMMPRE, Department of Mechanical Engineering, 3030-788 Coimbra, Portugal.
In this paper, we studied the deposition and characterization of monolithic and silver-doped copper coatings using RF magnetron sputtering. The main objective was to examine the impact of different Ag contents on natural and thermally induced aging when compared with monolithic copper coatings. For this purpose, the as-deposited surfaces were left exposed to normal temperature and humidity conditions during one year (natural) and were annealed at 200 °C in a non-controlled atmosphere.
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