Results 41 to 50 of about 935,704 (295)

State-of-the-Art Review on Determining Prestress Losses in Prestressed Concrete Girders

Applied Sciences, 2020
Prestressing methods were used to realize long-span bridges in the last few decades. For their predictive maintenance, devices and dynamic nondestructive procedures for identifying prestress losses were mainly developed since serviceability and safety of
Marco Bonopera, Kuo-Chun Chang, Zheng-Kuan Lee   +2 more
doaj   +1 more source

Estimation of Aircraft-Dependent Bumpiness Severity in Turbulent Flight

Applied Sciences, 2021
Atmospheric turbulence threatens flight safety of civil aviation aircraft by inducing aircraft bumpiness. A severity estimation method of aircraft bumpiness in turbulent flight is explored according to in-situ Eddy Dissipation Rate (EDR) indicator.
Haofeng Wang, Zhenxing Gao, Hongbin Gu, Kai Qi   +3 more
doaj   +1 more source

Symmetry‐Guided Multifunctional Acoustic System Based on Mechanically Actuated Sonic Crystals

Advanced Engineering Materials, EarlyView.
This study presents the design, simulation, and experimental validation of amultifunctional acoustic metamaterial based on rotationally engineered sonic crystals.By tuning cylinder orientations, controllable band gaps and six distinct functionalities—including switching, topological insulation, beam splitting, and logic operations—areachieved ...
Yuanyan Zhao, Sriram Subramanian, Gianluca Memoli   +2 more
wiley   +1 more source

Rigid Finite Element Method In Modelling The Dynamics Of Risers And Considering Large Deflections

Polish Maritime Research
The dynamic analysis of risers often requires the consideration of large deflections. Due to large deflections in slender elements, the distance between the upper and lower ends of the vertical riser is smaller than that resulting from linear theory ...
Adamiec-Wójcik Iwona, Drąg Łukasz, Wojciech Stanisław   +2 more
doaj   +1 more source

Additive Manufacturing of Alumina‐Reinforced Elastomers

Advanced Engineering Materials, EarlyView.
Vat‐photopolymerized elastomers reinforced with platelet‐shaped alumina exhibited preferential orientation, reduced porosity, and significantly enhanced mechanical performance. A 3 wt% platelet loading increased tensile strength from 12.4 to 45.7 MPa, highlighting the critical role of filler morphology in elastomeric VPP composites.
Majid Barzegar Keyvani, Zongwen Fu, Robert Göstl, Hamed Shokri, Carmine Putignano, Gianluca Percoco, Bilal Gökce   +6 more
wiley   +1 more source

Experimental Study on the Effects of Sideslip and Rudder Deflection Angles on the Aerodynamics of an Aircraft Vertical Tail at Low Speeds

Fluids
The vertical tail plays a crucial role in aircraft directional stability and lateral control, especially during low-speed operations such as takeoff and landing.
Arash Shams Taleghani, Saeid Yektaei, Vahid Esfahanian, Soheila Abdolahipour   +3 more
doaj   +1 more source

Study of Lateral Displacements and the Natural Frequency of a Pedestrian Bridge Using Low-Cost Cameras

Sensors, 2020
Vision-based techniques are frequently used to compute the dynamic deflections of bridges but they are rather computationally complicated and require demanding instrumentation.
Yiannis Fradelos, Olga Thalla, Irene Biliani, Stathis Stiros   +3 more
doaj   +1 more source

OntOMat: Toward Ontology‐Based Product and Process Design Engineering and Optimization Solutions Fueling Circular Value Chains

Advanced Engineering Materials, EarlyView.
The OntOMat ontology establishes a structured framework for polymer matrix fiber reinforced composite materials, integrating manufacturing processes, characterization methods, and multiscale design through the VDI/VDE 3682 formalized process description standard.
Nicolas Christ, Jörg Hohe, Martin Kördel, Michael Giese, Niklas Toffert, Christian Seidel, Olaf Rehme, Patrik Schneider, Oliver Focke, Elie Abi Aoun, Claas Falldorf, Beñat Gutierrez, Alexandra Kühn, Sven Torstrick-von der Lieth, Christoph Herden, Erik Johannsen, Jan‐Uwe R. Schmidt, Felix Winkelmann, Andreas Schott, Daniel Schott   +19 more
wiley   +1 more source

On the astrogeodetic deflections of the vertical in Japan.

Journal of Physics of the Earth, 1974
With respect to the observed astrogeodetic deflections of the vertical at 192 stations in Japan except Hokkaido, the topographic-isostatic eflections are estimated and then the error in the Japanese system of geodetic coordinates are examined in details.
openaire   +2 more sources

Distinct Microstructural Characteristic Lengths Defining Notch Fatigue Crack Initiation and Propagation, and Defect Tolerance in Advanced Steels

Advanced Engineering Materials, EarlyView.
Schematic representation of modes of microcrack nucleation, growth and temporary arrestment at different boundaries, with the criteria for crack propagation in three scenarios: (1) large notch, (2) defect/small sharp notch, and (3) long crack. This work revisits and integrates results on the fatigue behavior of advanced bainitic steels (in particular ...
Lucia Morales‐Rivas
wiley   +1 more source