Results 71 to 80 of about 3,937 (225)

Vibration Attenuation of Cantilever Beam Using Electromagnetic Delayed Feedback

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT This study presents a combined analytical and numerical investigation of a single‐input single‐output delayed feedback controller designed to suppress vibrations in a cantilever beam actuated by an electromagnet positioned beneath its free end. An analytical model was developed using the linearized equation of motion for a transversely excited
Mohammad Alabdullah, Khaled Alhazza
wiley   +1 more source

Detecting Loosening of Bolt‐Flanged Pipe Using Smoothed Pseudo Wigner–Ville Distribution: Digital Twin‐Based Approach Using Convolution Neural Networks

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT In this paper, an integrated digital twin‐based fault‐diagnosis framework is proposed to detect bolt loosening in flanged pipe connections. The approach combines finite element‐based numerical modeling, experimental modal analysis, and advanced signal processing‐assisted deep learning to achieve reliable loosening detection under operational ...
Milad Shabani Yousefabad, Behzad Totakhaneh Bonab, Morteza Homayoun Sadeghi, Mir Mohammad Ettefagh, Mohammad Reza Chalak Qazani   +4 more
wiley   +1 more source

Influence of Icing on the Modal Behavior of Wind Turbine Blades

Energies, 2016
Wind turbines installed in cold climate sites accumulate ice on their structures. Icing of the rotor blades reduces turbine power output and increases loads, vibrations, noise, and safety risks due to the potential ice throw.
Sudhakar Gantasala, Jean-Claude Luneno, Jan-Olov Aidanpää   +2 more
doaj   +1 more source

Nonwoven rCF/PA6 Thermoplastic Composites: Hybrid Commingled Fibers vs. Powder Impregnation—Effects on Microstructure and Mechanical Properties

Polymer Composites, EarlyView.
Comparison of powder impregnation and hybrid commingled non‐wovens for PA6/rCF nonwoven composites. The two‐step powder route gives lower voids and higher properties, while the single‐step hybrid route is limited by precursor inhomogeneity and high void content.
Gaia Francesca Lupia, Tommaso Pini, Ilaria Rossitti, Sara Taherinezhad Tayebi, Marco Valente   +4 more
wiley   +1 more source

A Study on the Effect of External Loading for the Composite Material Layup of a Large Wind Turbine Blade Based on a Pattern Search Algorithm

Energies
As the trend towards larger wind turbines continues, the increasing length of wind turbine blades imposes higher demands on their structural properties. Long flexible wind turbine blades at the hundred-meter scale now typically employ composite materials.
Xuyang Zhuang, Wei Lu, Kai Zhang, Guangchuan Cao, Hang Meng   +4 more
doaj   +1 more source

Fusion Bonding Repair of Impact‐Damaged Elium Laminates: Comparison of Hot Pressing and Joule Heating

Polymer Composites, EarlyView.
Joule Heating‐Enabled Repair of Impact‐Damaged GFRP/Elium Laminates. ABSTRACT This study investigates the repairability of glass fiber‐reinforced Elium (GFRP/Elium) laminates incorporating nickel‐coated carbon veils, focusing on hot pressing and Joule heating as fusion bonding repair techniques.
Ozan Can Zehni
wiley   +1 more source

A Review of Advances in Composite Materials, Structural Optimization, and Machine Learning for Wind Turbine Blades: Challenges and Future Perspectives

Polymer Composites, EarlyView.
Overview of the holistic engineering lifecycle and core research pillars for wind turbine blades. ABSTRACT This paper reviews recent advancements across the lifecycle of wind turbine blades, focusing on three interconnected areas: advanced composites, structural optimization, and machine learning (ML) diagnostics. In materials, we highlight progress in
Kemal Hasirci, Denizhan Yavas, Alaeddin Burak Irez   +2 more
wiley   +1 more source

Role of Fiber Sizing in Interfacial Relaxation, Water Uptake and Fatigue Properties of Acrylic‐Matrix Composites

Polymer Composites, EarlyView.
Characterisation of glass fibre reinforced acrylic with acrylic‐tailored or multi‐compatible sizing agents. ABSTRACT Fiber‐reinforced infusible acrylic monomer resins are of interest as recyclable alternatives to epoxy and other thermoset resin composites, but the novelty of these resins causes published studies on acrylic‐matrix composites to often ...
Machar Devine, Duncan Hornsby, Conchúr M. Ó Brádaigh, Dipa Ray   +3 more
wiley   +1 more source

From Wind Turbine Blades to Recycled Glass Fibers: Analytical Modeling and Lab‐Scale Recycling Protocol

Polymer Composites, EarlyView.
Lab‐Scale Composite Dissolution Experiments were used for Prediction of Dissolution Duration. ABSTRACT Glass fiber‐reinforced thermosets are widely used in wind turbine blades. However, recycling these materials remains challenging because thermoset matrices cannot be remelted, and high‐temperature processes degrade glass fibers.
Agathe Navailles, Justine Beauson, Robert Pierce, Tom Andersen Løgstrup, Rajnish Kumar, Yi Chen, Stergios Goutianos   +6 more
wiley   +1 more source

Potential of Thermoset Polyolefins for FRP Concrete Reinforcing Bars

Polymer Composites, EarlyView.
Overview of XLPO and pDCPD resins for FRP reinforcing bars, highlighting resin chemistry, key performance characteristics, fiber sizing interactions, and principal degradation mechanisms in concrete environments. ABSTRACT Although thermoset polyolefins offer resistance to hydrolytic degradation and favorable processing characteristics, their potential ...
Osama Omar, Farzaneh Mahmoudi, Leonidas G. Bachas, Francisco De Caso, Brahim Benmokrane, Antonio Nanni   +5 more
wiley   +1 more source