Free vibration modelling of Single-walled Carbon Nanotubes using the Differential Quadrature Method

Belhadj, Abdelkadir

doi:10.18280/mmep.040107

Cited by 5 publications

(6 citation statements)

References 19 publications

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“…Many scholars have explored the signal extraction and enhanced the signal separation of Φ-OTDR [4,5], yet failing to consider the impacts of temperature, stress and thermo-mechanical coupling (TMC) on the vibration mode and data purity. The presence of these influencing factors may disturb the monitoring of the target signals and lead to serious positioning errors [6,7]. These problems must be solved urgently to ensure the effect of Φ-OTDR signal separation.…”

Section: Phase-sensitive Optical Time-domain Reflectometry (φ-Otdr)mentioning

confidence: 99%

Signal Separation of Phase-sensitive Optical Time-domain Reflectometry Considering Thermo-mechanical Coupling and 3D Data Matching

Wang¹,

Hu²,

Liu³

2019

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This paper aims to enhance the signal separation accuracy of phase-sensitive optical timedomain reflectometry (Φ-OTDR) under thermo-mechanical coupling (TMC). For this purpose, the Φ-OTDR signal was firstly separated by genetic algorithm-empirical mode decompositionnonnegative matrix factorization (GA-EMD-NMF). Then, the Kalman-proportional-integralderivative (PID) method was introduced to further separate the data. Taking the TMC as the input, a feedback model was constructed by the genetic algorithm-radial basis function (GA-RBF) to decouple the TMC. To tackle the 3D Φ-OTDR data, a 3D speeded up robust features (SURF) method was developed to reconstruct the box filter and Gaussian pyramid based on the features of the 3D data, thereby enhancing the positioning accuracy of Φ-OTDR signal. Later, several experiments were carried out in a semi-anechoic room, which proved that the proposed method outperforms the traditional methods. The research findings shed new light on signal separation of Φ-OTDR.

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Section: Phase-sensitive Optical Time-domain Reflectometry (φ-Otdr)mentioning

confidence: 99%

Signal Separation of Phase-sensitive Optical Time-domain Reflectometry Considering Thermo-mechanical Coupling and 3D Data Matching

Wang¹,

Hu²,

Liu³

2019

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“…The importance of CNT's are their exceptional electrical, mechanical [4], optical and chemical properties. The use of CNT's in medicine and biology is presented as following: 3.1.1.…”

Section: Figure2 Cnt Molecular Diagrammentioning

confidence: 99%

“…4 Exemple of CFD simulation of heart blood flow [59] Figure. 5 Exemple of CFD simulation of arterial microanastomoses [60]: (i) anatomy of the sdistal femoral artery, (ii) view prior to anastomosing, (iii) a completed anasotomosis,…”

Section: Computational Fluid Dynamicsmentioning

confidence: 99%

Recent Advances of Mechanical Engineering Applications in Medicine & Biology

Belhadj

Boudjemaa

2017

mèd technologies J.

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Background: Mechanics is an area of science dealing with the behavior of physical bodies (solids and fluids) undergoing action of forces, it comprised of statics, kinetics, and kinematics. The advances and research in Applied Mechanics has wide application in almost fields of study including medicine and biology. In this paper, the relationship between mechanical engineering and medicine and biological sciences is investigated based on its application in these two sacred fields. Some emergent mechanical techniques applied in medical sciences and practices are presented. Methods: Emerging applications of mechanical engineering in medical and biological sciences are presented and investigated including: biomechanics, nanomechanics and computational fluid dynamics (CFD). Results: This review article presents some recent advances of mechanical engineering applications in medicine and biology. Specifically, this work focuses on three major subjects of interests: Biomechanics that is increasingly being recognized as an important application of mechanical fundamentals in biomedical and biological sciences and practices, biomechanics can play a crucial role in both injury prevention as well as performance enhancement of living systems.  Novel techniques of nanomechanics including: Carbon nanotubes applications in therapy, DNA recognition, immunology, and antiviral resistance. Nanorobotics that combines between nanotechnology, mechanics and new biomaterials to design and develop nanorobots based bacteria and biochips; these nanoscale robots can be involved in biomedical applications, particularly for the treatment of cancer, cerebral aneurysm treatment, kidney stones removal surgery, treatment of pathology, elimination of defected parts in the DNA structure, and some other treatments to save human lives.  Computational fluid dynamics (CFD) tools that contribute on the understanding of blood flows, human organs dynamics and surgical options simulation. Conclusion: Recent advances of mechanical applications in medicine and biology are carried out in this review, such as biomechanics, nanomechanics and computational fluid dynamics (CFD). As perspectives, mechanical scholars and engineers can involve these cited applications in their researches to solve many problems and issues that doctors and biologists cannot.

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“…Madan et al [20] studied the effect of sigmoid graded disk on limit analysis and yielding locations. Zohra et al [21] investigated power law grading effects on natural frequency on FG beams and Belhadj [22] performed free vibration for MWCNT using differential quadrature method (DQM).…”

Section: Introductionmentioning

confidence: 99%

Limit Elastic Analysis of E-FGM Rotating Disk with Temperature Dependent Mechanical Properties

Madan¹,

Saha²,

Bhowmick³

2019

MMEP

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In present work, exponential law based grading of composition is considered for high speed rotating disks and Young's modulus is calculated for two cases namely; temperature dependent and temperature independent applications. In temperature dependent applications, Young's modulus is assumed to vary with temperature as well throughout the spatial coordinates of the disk. The effective Young's modulus of FGM is then calculated using modified rule of mixture. Limit elastic analysis is performed by using variational principle. Results show the effect of temperature over stresses and obtained limit elastic speed. It is observed that limit speed first increases with an increase in aspect ratio and starts decreasing after reaching a critical value. Limit speed also increases with increase in grading index. Effective yield stress of FGM is computed and plotted along with other stresses to identify location of yielding.

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Free vibration modelling of Single-walled Carbon Nanotubes using the Differential Quadrature Method

Cited by 5 publications

References 19 publications

Signal Separation of Phase-sensitive Optical Time-domain Reflectometry Considering Thermo-mechanical Coupling and 3D Data Matching

Signal Separation of Phase-sensitive Optical Time-domain Reflectometry Considering Thermo-mechanical Coupling and 3D Data Matching

Recent Advances of Mechanical Engineering Applications in Medicine & Biology

Limit Elastic Analysis of E-FGM Rotating Disk with Temperature Dependent Mechanical Properties

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