Abstract
This paper presents novel work on the buckling and vibration analysis of shear-deformable functionally graded carbon nanotube-reinforced composite (FG-CNTRC) beams on variable elastic foundations (VEFs). By integrating two-parameter VEF models with a quasi-three-dimensional higher-order shear deformation theory (3D-HSDT). The effective material characteristics of FG-CNTRC beams are described by the rule of mixture. The problem is solved analytically using Navier's technique after the equations of motion are derived using Hamilton's principle. The validity and efficiency of the suggested models and methodology are confirmed by comparing the findings with the results of the available literature. A detailed analysis is conducted on the impact of length-to-thickness ratio, elastic foundation (EF) characteristics, and carbon nanotube (CNT) distribution patterns on the natural frequencies and buckling loads of FG-CNTRC beams, and some benchmark findings are also demonstrated. The results showed that the factors taken into consideration had a significant effect on the FG-CNTRC beams' buckling loads and natural frequencies.
Key Words
beams; buckling load; CNTs; elastic foundation; HSDT; natural frequency
Address
Kenza Djilali Djebbour, Hassen Ait Atmane and Riadh Bennai: Laboratory of Structures, Geotechnics and Risks, Department of Civil Engineering, Hassiba Benbouali University of Chlef, Algeria/ Department of Civil Engineering, Hassiba Benbouali University of Chlef, Algeria
Mokhtar Nebab: Laboratory of Structures, Geotechnics and Risks, Department of Civil Engineering, Hassiba Benbouali University of Chlef, Algeria/ Department of Civil Engineering, Faculty of Technology, University of M'Hamed BOUGARA Boumerdes, Algeria
Mehmet Avcar and Burak İkinci: Department of Civil Engineering, Faculty of Engineering and Natural Sciences, Suleyman Demirel University, Cunur, Isparta, Türkiye
Abstract
This study presents a novel methodology for mitigating vibrations in sandwich plates with sensor/actuator face sheets and a carbon nanotube (CNT)-reinforced core, resting on a concrete auxetic foundation under external loading. A comprehensive mathematical simulation framework is developed, incorporating higher-order shear deformation theory and Hamilton's principle to model the dynamic behavior of the system. The proposed approach integrates an artificial intelligence-based deep neural network (DNN) to enhance accuracy and validate the numerical results. The sensor/actuator face sheets, equipped with piezoelectric layers, enable active control of vibrations through real-time feedback mechanisms, while the CNT-reinforced core enhances stiffness and damping characteristics. The unique auxetic properties of the concrete foundation further contribute to energy dissipation and vibration reduction. The study systematically examines the effects of CNT distribution, auxetic parameters, and control strategies on the dynamic response of the sandwich plate. The mathematical model is trained using high-fidelity datasets, and the DNN algorithm optimizes predictive accuracy, demonstrating superior agreement with benchmark numerical solutions. Results confirm the efficacy of the proposed methodology in reducing vibrations, offering significant improvements over conventional passive and active control techniques. The developed framework provides valuable insights for designing intelligent structural systems with enhanced vibration suppression capabilities, contributing to the advancement of high-performance aerospace, civil, and mechanical engineering applications. Future research directions include experimental validation and extending the approach to nonlinear dynamic regimes.
Key Words
carbon nanotube reinforcement; concrete auxetic foundation; deep neural networks; sandwich plate; vibration mitigation
Address
Hao Li, Yudong Han and Tong Zhang: School of Civil Engineering, University of Science and Technology Liaoning, Anshan, 114051, China
Cheng Zhang: Liaoning Metallurgical Geological Exploration Research Institute Co, Anshan, 114038, China
Ameni Brahmia: Department of Chemistry, College of Science, King Khalid University, P.O. Box 9004, 61413 Abha, Saudi Arabia
Abstract
This research aims to investigate the effect of strength training on soccer ball shooting speed, comparing biomechanical characteristics. Some important biomechanical parameters, including the maximum angular velocity of the hip and knee joints, the maximum torque of the hip and knee joints in the forward movement and impact phases, and finally, the maximum ball speed, were selected for analysis. One-way analysis of variance with repeated measures and Tukey's test showed a significant decrease in the maximum ball speed and the maximum angular speed of the knee joint between the first and fifth shots and subsequent shots. Compared to the first shoot, the hip joint's maximum angular velocity, and torque significantly decreased from the sixth shot onwards. After five weeks of performing strength and flexibility exercises, a test was taken comparing two methods of strength and flexibility. Ultimately, the data were analyzed with correlated and uncorrelated t-student statistical methods. The results showed that the selected strength training program significantly affects shot range and dribble speed. Also, to increase the physical and mechanical resistance of soccer balls, nanotechnology has been used by the production of plastics with nanomaterials.
Key Words
biomechanics; dynamic; football shooting; nano-bio-mechanics; nanotechnology; soccer ball; strength training
Address
Qiannan Liu: Physical Education college, Chongqing Technology and Business University, Chongqing 400067, Chongqing, China
Yiqiao Zhang: Physical education college, Hubei University of Arts and Science, Xiangyang 441053, Hubei, China
Mostafa Habibi: Universidad UTE, Facultad de Arquitectura y Urbanismo, Calle Rumipamba S/N y Bourgeois, Quito 170147, Ecuador/ Department of Biomaterials, Saveetha Dental College and Hospital, Saveetha Institute of Medical and Technical Sciences, Chennai 600 077, India/ Institute of Research and Development, Duy Tan University, Da Nang 550000, Viet Nam
Ameni Brahmia: Department of Chemistry, College of Science, King Khalid University, P.O. Box 9004, 61413 Abha, Saudi Arabia
Yipng Su: Institute Sciences and Design of AL-Kharj, Dubai, United Arab Emirates
Abstract
In this study, the friction stir process (FSP), which can be successfully applied to plate-type materials, was applied to DP800 steel in a varying number of passes (1, 2, and 3 passes), and the effects of the FSP on the microstructure, hardness, and strength values of the steel were examined. In addition, the changes in the strength values after the FSP were transferred to the finite element (FEM) and artificial neural network (ANN) based contact problem models, and the changes in the contact stress and areas were determined comparatively. As a result of the examinations, it was determined that there were significant reductions in grain sizes in the microstructure compared to the pre-processed material at all pass numbers after FSP. As a result, the hardness and strength values of the steel increased after FSP. FEM and ANN analyses revealed that maximum contact stress values increased after FSP due to higher strength, while contact area values decreased proportionally.
Address
Semih Mahmut Aktarer: Department of Automotive Technology, Recep Tayyip Erdogan University, 53020, Rize, Turkey
Tevfik Küçükömeroğlu: Department of Mechanical Engineering, Karadeniz Technical University, 61100, Trabzon, Turkey
Dursun Murat Sekban: Department of Marine Engineering Operations, Karadeniz Technical University, 61530, Trabzon, Turkey/ WMS Engineering Services Industry Trade Limited Company, 61080, Trabzon, Turkey
Ecren Uzun Yaylaci: Faculty of Fisheries, Recep Tayyip Erdogan University, 53100, Rize, Turkey
Murat Yaylaci: Department of Civil Engineering, Recep Tayyip Erdogan University, 53100, Rize, Turkey/ Faculty of Turgut Kiran Maritime, Recep Tayyip Erdogan University, 53900, Rize, Turkey/ Murat Yaylaci-Luzeri R&D Engineering Company, 53100, Rize, Turkey
Mehmet Emin Özdemir: Department of Civil Engineering, Cankiri Karatekin University, 18100, Çankiri, Turkey
İrem Mirzaloglu: Department of Civil Engineering, Recep Tayyip Erdogan University, 53100, Rize, Turkey
Abstract
This study investigates the complex relationship between physical activity and hemodynamic changes in the circulatory system using advanced mechanical and mathematical modeling. Under dynamic load, blood vessels are portrayed as microtubular structures, allowing for precise characterization of their biomechanical responses to exercise-induced forces. The microscale effects of pulsatile blood flow caused by physical exertion are accurately captured by the proposed model, which combines classical beam and tube theories with the size-dependent modified couple stress theory. The governing equations are solved using a rigorous numerical framework, allowing for detailed analysis of stress-strain distributions, wall shear stress, and vascular deformation across a wide range of hemodynamic conditions. The results show that exercise-induced shear stresses and pressure variations help to strengthen vascular walls, emphasizing sports' critical role in improving vascular resilience. This study combines sports physiology and biomechanical engineering to provide a predictive framework for assessing athletic training-induced vascular adaptations. By emphasizing the importance of exercise in cardiovascular health, the study provides valuable insights for optimizing training regimens and developing targeted rehabilitation strategies. This interdisciplinary approach improves our understanding of hemodynamic behavior in physically active people, paving the way for novel applications in sports medicine and vascular health management.
Key Words
exercise-induced shear stress; hemodynamic adaptations; microtube modeling; modified couple stress theory; sport activities; vascular biomechanics
Address
Zimin Chang, Kai Wang and Yuan Wan: College of Sports and Health, Nanchang Institute of Science and Technology, Nanchang 330108, Jiangxi, China
Mostafa Habibi: Universidad UTE, Facultad de Arquitectura y Urbanismo, Calle Rumipamba S/N y Bourgeois, Quito 170147, Ecuador/ Department of Biomaterials, Saveetha Dental College and Hospital, Saveetha Institute of Medical and Technical Sciences, Chennai 600 077, India/ Institute of Research and Development, Duy Tan University, Da Nang 550000, Viet Nam
Belgacem Bouallegue: Department of Computer Engineering, College of Computer Science, King Khalid University, ABHA, 61421, Saudi Arabia
Xioadao Chen: Department of Physical Education, Guangdong University of Finance, Guangzhou 510521, Guangdong, China/ Institute Sciences and Design of AL-Kharj, Dubai, United Arab Emirates
Abstract
Nanotechnology has been integrated into architectural design, and the construction industry is experiencing new solutions that give better structural integrity, aesthetic value, and sustainability for buildings. This paper elaborately analyses and creates, with a lot of care and imagination, the use of nanotechnology in engineering resistant architectural structures linking innovation in scientific research to the artistic principles of designs. Nanotechnology, through the manipulation of materials at the nanoscale level, provides a variety of prospects that will extend or even redefine conventional construction methods for architects and engineers. Architectural structures with precisely constituted nanomaterials—carbon nanotubes and graphene derive strength and resilience unprecedented in their ability to withstand environmental stresses and human impacts. This approach is not bereft of the artistic aspect in architectural design, even if it has a technologically zealous name. Using nanomaterial properties, an architect can let his imagination run wild and pull out architecturally striking, avant-garde structures that set the imagination afire while serving practical purposes. This will offer an avenue for the fusion of art and science in the design process to unleash new ways of iconic landmark creation testaments which shall reflect human ingenuity and progress. It will, therefore, be seeking to explore the multi-dimensional applications of Nanotechnology in terms of architecture, ranging from structural analysis to aesthetic improvement and sustainability with durability. It is the belief of the paper that in pointing out or highlighting the symbiotic relationship that exists between technology and artistry, it will be in a position to segue the community of architects to be more innovative, experiment with new ideas in the architectural design dimension.
Key Words
architectural structures; artistic design; nanotechnology; sustainability for buildings
Address
Zhenzhen Kang: School of Arts, Tianjin University of Commerce, Tianjin 300134, Tianjin, China
Canlin Zhang: Florida State University, USA
Wei Miao: Shandong Vocational College of industry, Zibo 255000, Shandong, China
Abstract
The study evaluates how smart nanoparticles affect beam structural performance while using computational resources hosted on remote servers. An enhanced advanced adaptive harmony search algorithm (AAHS) serves to boost optimization efficiency levels. The algorithm makes two sequential parameter adjustment stages which start by adapting harmony memory through variable bandwidth methods and proceed with adaptive step-size implementations. The research investigates the best design parameters for ZnO nanoparticle reinforced nanocomposite sinusoidal beams under different axial force and foundation property conditions and applied voltage levels. Results show that the proposed AAHS method outperforms alternative optimization methods according to comparative research. Under 50 GPa buckling force and 100 V applied voltage the optimal beam should have L/h ratio of 4.425 together with 118 GPa foundation spring constant, 29 Pa shearing constant and 0.055 ZnO nanoparticle volume fraction. The study demonstrates that all three factors namely applied voltage, buckling force and foundation stiffness critically affect optimization of beams.
Address
Hui Li, Chenxia Wu, Yao Lu, Hongqiao Yan: School of Sport Communication and lnformation Technology, Shandong Sport University, Jinan 250000, Shandong, China
M. Kaffashi: Department of Civil Engineering, University of Zabol, Zabol, Iran
Abstract
Examining the viscous incompressible bioconvection Casson type nanoliquid flow with Darcy-Forchheimer resistance across a non-linear stretching surface is the primary goal of this study. Non-dimensional variables are used to decrease non-linear expressions. The shooting technique is used to solve the simplified ordinary differential equations. The behavior of several influential parameters is examined graphically and the concentration profile is examined. Thermophoresis parameter, Prandtl number, energy activation, chemical reaction factor, and concentration slip parameter all improve the concentration profile. By contrasting the current findings with earlier published research, the validity of the current study is validated.
Key Words
chemical reaction factor; concentration slip parameter; energy activation; Prandtl number; thermophoresis parameter
Address
Amal Abdulrahman: Department of Chemistry, College of Science, King Khalid University, Abha 61421, Saudi Arabia
Humaira Sharif: Department of Mathematics, Govt. College University Faisalabad, 38000, Faisalabad, Pakistan
Abdelfattah Amari: Department of Chemical Engineering, College of Engineering, King Khalid University, Abha 61411, Saudi Arabia
Muzamal Hussain: Department of Mathematics, University of Sahiwal, Sahiwal, Pakistan
Mohamed Amien Khadimallah: Department of Civil Engineering, College of Engineering in Al-Kharj, Prince Sattam Bin Abdulaziz University, Al-Kharj, 11942, Saudi Arabia
Abdur Rauf: Department of Chemistry, University of Sahiwal, 57000, Pakistan
