Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Alaa A. Abdelrahman"'
Publikováno v:
AIMS Mathematics, Vol 9, Iss 6, Pp 13944-13979 (2024)
Accuracy is an important factor to consider when evaluating the performance of a manipulator. The accuracy of a manipulator is determined by its ability to accurately move and position objects in a precise manner. This research paper aims to evaluate
Externí odkaz:
https://doaj.org/article/5b3904554fef406ea596c654fbc7643d
Publikováno v:
Results in Engineering, Vol 20, Iss , Pp 101407- (2023)
This manuscript presents a mathematical model and numerical solution to predict vibration responses of nonlocal strain gradient (NLS) perforated viscoelastic nanobeam under dynamic moving loads. The microstructure and size length scales are considere
Externí odkaz:
https://doaj.org/article/83b8ffeb01cd4cd8960699d6514c48ec
Publikováno v:
Mathematics, Vol 11, Iss 5, p 1162 (2023)
Analysis of the electromechanical-size-dependent bending of piezoelectric composite structural components with flexoelectricity has been considered by many researchers because of the developments of nanotechnology and the applicability of piezoelectr
Externí odkaz:
https://doaj.org/article/aa3a19a5969a4040b3fda01e6d28ec76
Publikováno v:
Mathematics, Vol 11, Iss 5, p 1180 (2023)
This article investigates the size dependent on piezoelectrically layered perforated nanobeams embedded in an elastic foundation considering the material Poisson’s ratio and the flexoelectricity effects. The composite beam is composed of a regularl
Externí odkaz:
https://doaj.org/article/25ecf26a85024ae8b42a746fef1c136d
Publikováno v:
Mathematics, Vol 10, Iss 15, p 2614 (2022)
This study presents a mathematical size-dependent model capable of investigating the dynamic behavior of a sandwich perforated nanobeam incorporating the flexoelectricity effect. The nonlocal strain gradient elasticity theory is developed for both co
Externí odkaz:
https://doaj.org/article/b9b0fd34f9e942bc9e0092a5788e4c2c
Autor:
Engy K. Tharwat, Ahmed O. Abdelaty, Alaa I. Abdelrahman, Hebatallah Elsaeed, Ayatallah Elgohary, Amena S. El-Feky, Yasmina M. Ebrahim, Alaa Sakraan, Hossam A. Ismail, Yasser A. Khadrawy, Heba S. Aboul Ezz, Neveen A. Noor, Heba M. Fahmy, Haitham S. Mohammed, Faten F. Mohammed, Nasr M. Radwan, Nawal A. Ahmed
Publikováno v:
Metabolic Brain Disease. 38:1513-1529
Parkinson’s disease (PD) is the second most prevalent neurodegenerative disease worldwide and represents a challenge for clinicians. The present study aims to investigate the effects of cerebrolysin and/or lithium on the behavioral, neurochemical a
Publikováno v:
Mechanics Based Design of Structures and Machines. :1-24
In the context of nonclassical continuum mechanics, the nonlocal strain gradient theory is employed to develop a nonclassical size dependent model to investigate the dynamic behavior of a CNTs rein...
Publikováno v:
Applied Mathematical Modelling. 96:215-235
In the present manuscript, based on the nonlocal strain gradient theory, a nonclassical dynamic finite element model is developed to study and analyze the dynamic behavior of perforated nanobeam structures under moving mass/load. In the context of no
Autor:
Ranjit Sah, Alaa I Abdelrahman, Sanjit Sah, Abdelaziz Abdelaal, Abdelmonem Siddiq, Alfonso J Rodriguez-Morales
Publikováno v:
Journal of tropical pediatrics. 68(5)
Publikováno v:
International Journal of Mechanics and Materials in Design. 17:721-742
In the framework of nonlocal strain gradient theory, a size-dependent symmetric and sigmoid functionally graded (FG) Timoshenko beam model is developed to study and analyze the free vibration and dynamic response under moving load, for the first time