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Damage Sensitive Signals for the Assessment of the Conditions of Wind Turbine Rotor Blades Using Electromagnetic Waves

open access: yesInfrastructures, 2022
One of the most important renewable energy technologies used nowadays are wind power turbines. In this paper, we are interested in identifying the operating status of wind turbines, especially rotor blades, by means of multiphysical models. It is a state-
Zainab Riyadh Shaker Al-Yasiri   +3 more
doaj   +1 more source

STRENGTH ANALYSIS OF A PROTOTYPE COMPOSITE HELICOPTER ROTOR BLADE SPAR [PDF]

open access: yesApplied Computer Science, 2022
This paper investigates the strenght of a conceptual main rotor blade dedicated to an unmanned helicopter. The blade is made of smart materials in order to optimize the efficiency of the aircraft by increasing its aerodynamic performance.
Rafał KLIZA   +4 more
doaj   +2 more sources

On the Influence of Direction-Dependent Behavior of Rock Mass in Simulations of Deep Tunneling Using a Novel Gradient-Enhanced Transversely Isotropic Damage–Plasticity Model

open access: yesApplied Sciences, 2022
In engineering practice, numerical simulations of deep tunneling are commonly based on isotropic linear–elastic perfectly plastic rock models. Rock, however, commonly exhibits highly nonlinear and distinct direction-dependent mechanical behavior.
Thomas Mader   +2 more
doaj   +1 more source

Speed Matters in Nordic Hamstring Exercise: Higher Peak Knee Flexor Force during Fast Stretch-Shortening Variant Compared to Standard Slow Eccentric Execution in Elite Athletes

open access: yesSports, 2023
Hamstring strain injuries are prevalent in many sports. Research has demonstrated that the Nordic hamstring exercise (NHE), a knee-dominant exercise addressing the posterior chain muscles, can aid in reducing the risk of hamstring injuries in athletes ...
Jesper Augustsson   +2 more
doaj   +1 more source

The Strength and Fatigue Life analysis of Sedan Car Ramp of The Ferry Ro-Ro 5000 GT Using Finite Element Method

open access: yesKapal, 2021
The Ferry Ro-Ro 5000GT has three levels of car deck that are connected by internal ramps. Two issues that have to be paid attention during the operation of the internal ramp there are the strength capacity and the design fatigue life of the internal ramp
Alamsyah Alamsyah   +4 more
doaj   +1 more source

A Generalized Method for Dispersion Analysis of Guided Waves in Multilayered Anisotropic Magneto-Electro-Elastic Structures

open access: yesShock and Vibration, 2022
Based on the symplectic structure of the Hamiltonian matrix, the precise integration method (PIM), and the Wittrick–Williams (W-W) algorithm, a generalized method for computing the dispersion curves of guided waves in multilayered anisotropic magneto ...
Yanhui Zhang, Qiang Gao
doaj   +1 more source

Investigating the Factor of Safety for the Design of Columns Using Properties of Steel Rebar’s Manufactured in Pakistan [PDF]

open access: yesArchives of Civil Engineering, 2020
This paper includes the behaviour of RC column, using the steel strength data employed by Rafi et al. (2014). Eccentric short columns are studied for this purpose, both tension and compression controlled sections, are analysed considering the current ...
Safdar Abbas Zaidi   +2 more
doaj   +1 more source

Strength Analysis of Alternative Airframe Layouts of Regional Aircraft on the Basis of Automated Parametrical Models

open access: yesAerospace, 2021
This publication presents the results of complex parametrical strength investigations of typical wings for regional aircrafts obtained by means of the new version of the four-level algorithm (FLA) with the modified module responsible for the analysis of ...
Dmitry V. Vedernikov   +3 more
doaj   +1 more source

STRENGTH ANALYSIS OF AN OFF-ROAD LORRY FRAME [PDF]

open access: yesScientific Journal of Silesian University of Technology. Series Transport, 2021
The lorry frame is the main carrying part of a lorry, composed of several components. These components are connected by joints into one structural unit and it forms the lorry chassis.
Ján DIŽO   +5 more
doaj   +1 more source

Verification of Automotive Monopost Seat Strength through Dynamic and Quasi-Static Simulations

open access: yesApplied Sciences, 2023
A monopost seat is a novel, lightweight seat developed to utilize most of the interior space of vehicles. The space under the seat can be utilized by inserting a monopost columnar structure between a monopost seat rail and the floorboard.
Di Sun   +3 more
doaj   +1 more source

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