Results 191 to 200 of about 8,757,591 (356)
Macromolecular Materials and Engineering, EarlyView.This research explores the effect of basket weave fabric structure and fiber combinations in hybrid composites, focusing on impact resistance, thermal stability, and flammability. The findings demonstrate that Kevlar‐glass laminates offer superior thermal stability and impact strength compared to Kevlar‐basalt laminates.
Mahdi Hosseini +10 more
wiley +1 more source
Lunar Power Grid: Network Structure and Spontaneous Synchronization [PDF]
arXivAchieving stable synchronized operation in an alternating current power network is critical to the continuity and reliability of energy delivery. In this paper, we study a dynamic model for synchronization in the proposed power network which the National Aeronautic and Space Agency plans to build on the lunar surface to support continuous human ...
arxiv
NExT‐LF: A Novel Operational Modal Analysis Method via Tangential Interpolation
International Journal of Mechanical System Dynamics, EarlyView.ABSTRACT Operational modal analysis (OMA) is vital for identifying modal parameters under real‐world conditions, yet existing methods often face challenges with noise sensitivity and stability. This study introduces NExT‐LF, a novel method that combines the well‐known Natural Excitation Technique (NExT) with the Loewner Framework (LF). NExT enables the
Gabriele Dessena +3 more
wiley +1 more source
Fluid Dynamics and Infrared Stealth of Marine IRS Devices: A Review
International Journal of Mechanical System Dynamics, EarlyView.ABSTRACT Infrared suppression (IRS) devices for naval ships play a crucial role in reducing the infrared radiation signature of high‐temperature exhaust, thereby enhancing the survivability of ships against infrared‐guided weapons. This paper provides a comprehensive review of recent advancements in the design and optimization of IRS devices.
Yitao Zou +5 more
wiley +1 more source
International Journal of Mechanical System Dynamics, EarlyView.ABSTRACT The supercritical drive shaft is becoming increasingly popular in helicopter transmission system. Dry friction dampers are specially employed to ensure the supercritical shafts crossing the critical speed safely. Due to design tolerances, manufacturing errors and time‐varying factors, the parameters of the damper are inherently uncertain ...
Liyao Song +4 more
wiley +1 more source
Numerically Determined Empirical Relationships for a Transitional Turbulence Model
Journal of Applied Fluid Mechanics, 2019 Turbulence models in computational fluid dynamics (CFD) aim to capture a complex phenomenon through simplified mathematical models. The models themselves range in terms of application, complexity and methodology.
G. Erfort +2 more
doaj
Proceedings of the National Academy of Sciences of the United States of America, 2012 Natasha DeLeón-Rodriguez +9 more
semanticscholar +1 more source
Mission Abort Policy Considering Imperfect Alarms and Two Abort Options
Naval Research Logistics (NRL), EarlyView.ABSTRACT A mission may be aborted during operation to increase the likelihood of system survival when an alarm system indicates that the system has entered a defect state. However, due to measurement and environmental noise, missed and false alarms frequently occur during online condition monitoring, complicating the decision‐making process for mission
Jiawen Hu, Piao Chen
wiley +1 more source
ChemistryOpen, EarlyView.Biochar derived from woody alien vegetation has been used as a support material for proton exchange membrane fuel cells. This study focuses on the prospects of using biochar specifically from alien vegetation as an alternative for carbonaceous support material to convert and store electrochemical energy.
Alunge Gift Sobekwa +4 more
wiley +1 more source
Polymer Composites, EarlyView.Sequential coupling of motion and heat‐transfer of long‐discontinuous fiber reinforced pellets in a single screw extruder. Abstract Single screw extrusion is widely used in material pre‐compounding, extrusion additive manufacturing, and injection molding.
Vasudha Kapre +2 more
wiley +1 more source