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Force Feedback Method for Statically Indeterminate Steel Structure Construction Based on Staged Temperature Measurement.
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China Construction Steel Engineer Co., Ltd., Shenzhen 518118, China.
Structural design usually adopts uniform temperature action. However, during the actual construction of the structure, the temperature field acting on the structure is inhomogeneous. Therefore, the simulation of the construction of statically indeterminate steel structures considering only the uniform temperature field cannot truly reflect the temperature action after structural molding and the evolution of the stress performance of the temporary stress system of structural construction.
View Article and Find Full Text PDFDamage and Failure Monitoring of Aerospace Insulation Layers Based on Embedded Fiber Bragg Grating Sensors.
Polymers (Basel)
December 2024
Research Institute of Aero-Engine, Beijing University of Aeronautics and Astronautics, Beijing 102206, China.
Carbon fiber-reinforced polymer (CFRP) composites are widely used in aviation thermal insulation layers due to their high strength-to-weight ratio and excellent high-temperature performance. However, challenges remain regarding their structural integrity and durability under extreme conditions. This study first employed finite element simulation to model the damage evolution of CFRP laminated plates under axial tensile loads and their thermal decomposition behavior in high-temperature environments, providing a theoretical reference.
View Article and Find Full Text PDFFull Spectrum Electrochromic WO Mechanism and Optical Modulation via Ex Situ Spectroscopic Ellipsometry: Effect of Li Surface Permeation.
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School of Physics, Changchun University of Science and Technology, Changchun 130012, China.
Tungsten oxide (WO) electrochromic devices are obtaining increasing interest due to their color change and thermal regulation. However, most previous work focuses on the absorption or transmission spectra of materials, rather than the optical parameters evolution in full spectrum in the electrochromic processes. Herein, we developed a systematic protocol of ex situ methods to clarify the evolutions of subtle structure changes, Raman vibration modes, and optical parameters of WO thin films in electrochromic processes as stimulated by dosage-dependent Li insertion.
View Article and Find Full Text PDFDetermination of Strain and Stress Field in Screening Test for Concrete Fire Spalling-Passive Restraint Effect.
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December 2024
Centre of Materials and Building Technologies (C-MADE), Department of Civil Engineering and Architecture, University of Beira Interior (UBI), 6201-001 Covilhã, Portugal.
The paper examines the impact of passive restraint on fire-induced spalling in concrete, utilizing a concrete mixture to minimize compositional variability. A variety of specimen geometries was prepared, including standard cubes and cylinders for the determination of mechanical properties and slabs of different dimensions for fire spalling tests conducted under controlled conditions. A top-opening Dragon furnace, which applies ISO 834-1 fire curves, was used to evaluate the influence of "cold rim" boundaries, where slab edges were insulated to create thermal restraint.
View Article and Find Full Text PDFThermal Plasticity and Evolutionary Constraints in : Implications for Climate Change Adaptation.
Biology (Basel)
December 2024
Departamento de Ingeniería Genética, Unidad Irapuato, Cinvestav 36824, Mexico.
The ongoing rise in global temperatures poses significant challenges to ecosystems, particularly impacting bacterial communities that are central to biogeochemical cycles. The resilience of wild mesophilic bacteria to temperature increases of 2-4 °C remains poorly understood. In this study, we conducted experimental evolution on six wild strains from two lineages ( and ) to examine their thermal adaptation strategies.
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