Dynamic simulation of the ultra-fast-rotating sandwich cantilever disk via finite element and semi-numerical methods

Wu, Jianhua; Habibi, Mostafa

doi:10.1007/s00366-021-01396-6

Cited by 38 publications

(3 citation statements)

References 99 publications

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“…To verify the absorber's performance, we performed a simulation using the finite‐difference time domain method; other numerical algorithm methods are used for verification, and the results are consistent. [ 44–46 ] The material parameters of Ti and Al 2 O 3 were obtained from Rakić [ 47 ] and Querry, [ 48 ] respectively. The light is vertically incident along the negative direction of the z ‐axis, and the electric field propagates along the x ‐axis.…”

Section: Modeling and Simulationmentioning

confidence: 99%

Broadband and Energy‐Concentrated Absorber Based on Hemispherical‐Embedded Structure

Liang

Shi

et al. 2023

Advanced Photonics Research

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Spatially concentrated absorption is able to form local hotspots and helps to generate hot electrons with higher energy than free electrons, which can be used to improve the performance of hot electron devices. Herein, a broadband, wide‐angle, and highly concentrated metamaterial absorber operating in near‐infrared and midinfrared bands is proposed. The absorptivity of the proposed absorber exceeds 90% in the wavelength range of 2.0–5.4 μm, and the average absorptivity at 2.0–5.4 μm reaches 93.5%. Moreover, the absorber can highly concentrate the energy of the incident light on a point on the bottom surface of the device; the area with concentrated energy only accounts for 1.4% of the total area of the bottom, thus forming a hotspot. Meanwhile, the absorber can still maintain an average absorptivity of more than 85% when the incident light angle of various polarization directions reaches 60°. These characteristics enable the device to provide a solution to improve the performance of hot electrons, energy collection, and imaging devices.

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Section: Modeling and Simulationmentioning

confidence: 99%

Broadband and Energy‐Concentrated Absorber Based on Hemispherical‐Embedded Structure

Liang

Shi

et al. 2023

Advanced Photonics Research

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“…The broken beam problem was addressed using FEM and Newton-Raphson methods [22]. The broken beam's native frequencies were discovered using the Transfer Matrix Method (TMM) [23]. Inverse crack detection was addressed.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Analysis of the natural composite material layers influence on the cantilever’s structural performance

wazir¹

2022

EEJET

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In this study, with their high strength-to-weight ratio, adaptability, and lack of corrosion, composite materials are widely used in aircraft construction and can be considered an acceptable metal substitute by all parties involved. Static load tests have been performed under identical conditions and stresses, but the layer sequence was changed. The Ansys workbench ACP-pre is utilized to analyze the data. Various deformations were found as a result of this. There are values of 14.265 and 0.1335 for the smallest z-direction deformation and for the overall strain in the composite 3 examples. Boundary conditions have been confirmed with 1,500 N as a resultant force with the static condition. The simulation results have been analyzed as a static condition. Four materials have been employed in different order to be investigated and these materials are Sisal, Pineapple, Jute, and Kenaf. The numerical results have been undertaken using the static structure of Ansys 16.1 Version tool. Geometry has been modeled and meshed using Ansys workbench. The model has been verified using convergence test. As the output, total deformation and von Mises stresses were investigated and explained accordingly. Numerical results stated that the maximum deformation due applied load was at the Z-axis. The maximum total deformation value is 1.254 mm and the minimum is 2.5 mm. Furthermore, von Mises stresses of the entire body have been calculated. The numerical results have shown the maximum result due to 1,500 N is 1.1 mPa. Eventually, the main aim has been achieved by employing total deformation and von Mises stresses accordingly

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“…Despite the extensive work on using microstructure modeling for static studies, the number of studies that evaluate microstructure modeling to study the vibration properties of structures is limited. Most researchers only consider macro-level modeling [46][47][48][49] in vibration analysis.…”

Section: Introductionmentioning

confidence: 99%

A Modeling Framework to Develop Materials with Improved Noise and Vibration Performance for Electric Vehicles

Mostafavi Yazdi,

Pack,

Rouhollahi

et al. 2023

Energies

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The automotive and aerospace industries increasingly use lightweight materials to improve performance while reducing fuel consumption. Lightweight materials are frequently used in electric vehicles (EVs). However, using these materials can increase airborne and structure-borne noise. Furthermore, EV noise occurs at high frequencies, and conventional materials have small damping. Thus, there is an increasing need for procedures that help design new materials and coatings to reduce the transferred and radiated noise at desired frequencies. This study pioneered new techniques for microstructure modeling of coated and uncoated materials with improved noise, vibration, and harshness (NVH) performance. This work uses the microstructure of materials to study their vibration-damping capacity. Images from an environmental scanning electron microscope (ESEM) show the microstructure of a sample polymer and its coating. Tensile tests and experimental modal analysis were used to obtain the material properties of the polymer for microstructure modeling. The current work investigates how different microstructure parameters, such as fiberglass volume fraction and orientation, can change the vibration performance of materials. The damping ratio in the study was found to be affected by changes in both the direction and volume ratio of fiberglass. Furthermore, the effects of the coating are investigated in this work. Through modal analysis, it was observed that increasing the thickness of aluminum and aluminum bronze coatings caused a rightward shift in resonance frequency. Coatings with a thickness of 2 mm were found to perform better than those with lower thicknesses. Furthermore, the aluminum coating resulted in a greater shift in frequency than the aluminum bronze coating. Additionally, the coating with a higher damping ratio (i.e., aluminum bronze) significantly reduced the amplitude of surface velocity due to excitation, particularly at higher frequencies. This study provides engineers with an understanding of the effects of layer coating on the NVH performance of components and a modeling approach that can be used to design vehicles with enhanced noise and vibration performance.

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Dynamic simulation of the ultra-fast-rotating sandwich cantilever disk via finite element and semi-numerical methods

Cited by 38 publications

References 99 publications

Broadband and Energy‐Concentrated Absorber Based on Hemispherical‐Embedded Structure

Broadband and Energy‐Concentrated Absorber Based on Hemispherical‐Embedded Structure

Analysis of the natural composite material layers influence on the cantilever’s structural performance

A Modeling Framework to Develop Materials with Improved Noise and Vibration Performance for Electric Vehicles

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