Article
Engineering, Civil
Li-min Tian, Mu-han Li, Lei Li, Dong-ye Li, Chong Bai
Summary: This study focuses on improving the collapse resistance of steel frame structures by welding corrugated steel plates between the flange of I-shaped beams and the column to create reinforced joints. The collapse resistance tests were conducted on the novel reinforced joints with welded and bolt-welded connections. The study analyzes the effects of the circular arc length, thickness, and central angle of the corrugated plates on the collapse resistance and proposes design recommendations. The results show that the reinforced joints significantly improve the bearing capacities and ductility of the steel frame structures without compromising their seismic behavior.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Mechanical
G. L. Golewski
Summary: This paper presents a comparative study on the fracture toughness and crack propagation of concretes made with quaternary binders. The use of mineral additives in combination with nanosilica as a partial replacement of ordinary Portland cement binder is proposed. The tests conducted aimed to assess the mechanical parameters, fracture toughness, and fracture processes of the concretes. The results showed that modifying the binder composition with three pozzolanic active materials increased the mechanical parameters compared to control concrete. Additionally, as the content of fly ash increased, the concrete became more ductile and exhibited less brittle failure. The composite with 80% OPC, 5% FA, 10% SF, and 5% nS showed high fracture toughness and lower brittleness, making it suitable for reinforced concrete structures subjected to dynamic or cyclic loads.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Engineering, Mechanical
Wen-Bo Bo, Ru-Ru Wang, Yin Fang, Yue-Yue Wang, Chao-Qing Dai
Summary: The physical information neural network is used to successfully predict the multipole soliton solution for the non-integrable equation, which exists under the PT-symmetric potential in saturable nonlinear media with fractional diffraction. The quadrupole, pentapole and sextupole solitons can coexist for the same parameters. The modulation intensity of the PT-symmetric potential and Levy index together modulate the existence and stable domain of multipole solitons.
NONLINEAR DYNAMICS
(2023)
Article
Mechanics
Souhir Zghal, Dhia Ataoui, Fakhreddine Dammak
Summary: This paper investigates the influence of porosity on the bending static analysis of functionally graded beams using a refined mixed finite element beam model. Material properties of functionally graded porous beams are estimated using a modified power law distribution with even and uneven porosity distributions. The potential of the proposed model is highlighted through comparison and a parametric study.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2022)
Article
Engineering, Mechanical
Chen Li, Yuxiu Hu, Feihu Zhang, Yanquan Geng, Binbin Meng
Summary: This study investigated the effects of traditional grinding and laser assisted grinding on gallium nitride crystals through molecular dynamics simulations. The results showed that laser assisted grinding at an appropriate laser power density can reduce grinding force, material damage, and wear. However, excessive laser power densities can lead to more severe subsurface damage and amorphous damage.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Civil
Z. L. Wang, Judy P. Yang, K. Shi, H. Xu, F. Q. Qiu, Y. B. Yang
Summary: The vehicle scanning method (VSM) is an indirect approach for bridge measurement that does not require sensors to be mounted on the bridge but only on the test vehicle. It has been extensively applied in various aspects of bridge measurement, such as construction of mode shapes, identification of damping ratios, and detection of damages. The indirect method offers advantages in terms of mobility, economy, and efficiency compared to the conventional direct method. The VSM has seen significant growth in research, with lab experiments, field tests, and the incorporation of modern devices enhancing its capabilities.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2022)
Article
Thermodynamics
Ikram Ullah
Summary: This study presents an analysis of the Marangoni convection flow of hybrid nanomaterials in an infinite porous disk. The hybrid nanomaterials consist of gamma ALOOH and AA7075 nanoparticles, and gasoline oil is used as the base liquid. The Darcy-Forchheimer law is employed and the thermal field on the disk surface is assumed to vary quadratically. The effects of irregular heat source, radiation, and dissipation are also taken into account. The system is dimensionless using Von Kamran variables and the NDsolver scheme is used to approximate the reduced system. Various physical variables such as surface temperature gradient, temperature, and velocity are analyzed through graphs and tables. It is found that hybrid nanomaterials exhibit the highest thermal conductivity compared to traditional liquid and nanoliquid.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Mechanics
Guijun Xian, Rui Guo, Chenggao Li, Yunjia Wang
Summary: The study highlights the significant role of long-term prestressed loss and mechanical property evolution in steel/concrete structures strengthened with prestressed CFRP plates. A new prestressed tension device and anchorage system were proposed to enhance the reliability and load-bearing capacity of CFRP plates. Exposure of CFRP plates to elevated temperatures, distilled water, and sustained loading resulted in gradual degradation of tensile strength.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Mechanical
Yi-Wei Zhao, Jun-Wen Xia, Xing Lu
Summary: The extended coupled (2+1)-dimensional Burgers system is utilized to describe wave processes in oceanography, acoustics, or hydrodynamics. By employing the Riccati projective equation method and symbolic computation, a variable separation solution is derived. The study focuses on fractal and chaotic structures based on the gradient function (U), and analyzes some excitation properties of the solutions with accompanying figures showing the shape and structure.
NONLINEAR DYNAMICS
(2022)
Article
Mechanics
Jijun Luo, Jun Song, Zohre Moradi, Maryam Safa, Mohamed Amine Khadimallah
Summary: The stability of a functionally graded annular plate reinforced with graphene platelets on a two-parameter elastic foundation is investigated. The effect of weight fraction of nanoparticles, the type of FGM, geometric dimensions, various boundary conditions, and surrounding elastic foundation on the buckling behavior of the plate is evaluated.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2022)
Article
Mathematics, Interdisciplinary Applications
A. English, J. M. Dominguez, R. Vacondio, A. J. C. Crespo, P. K. Stansby, S. J. Lind, L. Chiapponi, M. Gomez-Gesteira
Summary: The DualSPHysics code utilizes dynamic boundary conditions for solid surfaces, providing stable and efficient numerical simulations. However, there may be a gap between fluid and solid boundaries that can decrease pressure measurement accuracy. A new method has been introduced to reduce this gap and improve pressure convergence in still water scenarios.
COMPUTATIONAL PARTICLE MECHANICS
(2022)
Review
Thermodynamics
Jia-Qi Guo, Ming-Jia Li, Ya-Ling He, Tao Jiang, Teng Ma, Jin-Liang Xu, Feng Cao
Summary: This critical review provides a detailed complement of the status, barriers, and prospects of supercritical carbon dioxide (S-CO2) cycle power technology, and examines its application in solar thermal power plants, nuclear reactor power plants, and coal-fired power plants. The study emphasizes the thermodynamic, economic, environmental, and flexible feasibility of this technology. It also summarizes the construction of S-CO2 demonstration power stations and proposes the potential of the S-CO2 cycle to establish a multi-generation system with peak-shaving ability. The study aims to help understand the recent development progress in S-CO2 power technology.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Engineering, Mechanical
Changyu Wang, Kaiyu Luo, Jian Wang, Jinzhong Lu
Summary: In this study, the surface microstructure of AISI 420 martensitic stainless steel was modified using laser shock peening (LSP) technique, and the deformation mechanisms were investigated through observing microstructural evolution. The results showed that laser shock wave caused severe deformation in the original sub micron carbide, leading to carbide fragmentation and promoting nanocrystallization of martensitic laths. Additionally, carbide decomposition occurred simultaneously with severe plastic deformation, and this, along with fine grain strengthening, precipitation strengthening, and dislocation strengthening induced by LSP, contributed to an increase in the strength and ductility of AISI 420 martensitic stainless steel.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Thermodynamics
Hammad Younes, Mingyang Mao, S. M. Sohel Murshed, Ding Lou, Haiping Hong, G. P. Peterson
Summary: This review discusses the applications of nanofluids and their impact on thermal behavior and thermal conductivity by examining various parameters. It highlights the challenges and limitations posed by these parameters on heat transfer and commercialization efforts of nanofluids.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Junfei Guo, Zhao Du, Gang Liu, Xiaohu Yang, Ming-Jia Li
Summary: Metal foams can significantly improve the low effective thermal conductivity in phase change materials (PCMs) during melting and solidification processes, and compressing metal foams can further accelerate the energy storage rate. Results showed that compressed metal foam had better performance in improving phase change, while over-compressing metal foam should be avoided.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Amjad Ali Pasha, Nazrul Islam, Wasim Jamshed, Mohammad Irfan Alam, Abdul Gani Abdul Jameel, Khalid A. Juhany, Radi Alsulami
Summary: This study investigates the flow and heat transfer properties of a hybrid nanofluid on a slippery surface. The results show that the hybrid nanofluid has better heat transfer performance compared to regular nanofluids. Factors such as the shape and volume fraction of nanoparticles significantly affect the flow velocity, temperature, and entropy.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Review
Thermodynamics
Bingbing Qiu, Xuedong Tao, Jiahao Wang, Ya Liu, Sitong Li, Huaqiang Chu
Summary: Considering the pressures of energy and the environment, utilizing biomass as a renewable resource to obtain hydrocarbon fuels and high-value chemicals shows important application value and broad market prospects. However, improving the quality of bio-oil is crucial due to the challenges posed by the complex pyrolysis process of biomass, low calorific value, high oxygen content, and strong acidity.Various techniques such as direct catalytic pyrolysis, fast pyrolysis, and catalytic upgrading have been explored to prepare bio-oil and high value chemicals from biomass, each with its own achievements and challenges. Additionally, the catalytic characteristics of catalysts and their specific applications in catalytic pyrolysis, catalytic cracking, and catalytic hydrogenation are systematically summarized to provide new directions for lignocellulose biomass energy utilization research.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Mechanics
Guoliang Liu, Shengbin Wu, Davood Shahsavari, Behrouz Karami, Abdelouahed Tounsi
Summary: This article investigates the dynamic deflection response of exponentially functionally graded material (EFGM) nanoplate considering the role of porosities when embedded in a visco-elastic foundation and subjected to moving load, for the first time. The effective material properties are found using an exponential model of the rule of mixture. A state-space method is developed to solve the time-dependent governing motion equations and study the effects of various parameters on the forced vibration of the embedded nanoplate.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2022)
Article
Thermodynamics
M. Dinesh Kumar, C. S. K. Raju, Kiran Sajjan, Essam R. El-Zahar, Nehad Ali Shah
Summary: Hybrid modeling is important in various systems and has been used to describe the mixture of liquids. This study investigates the effects of different factors on three-dimensional flow characteristics and thermal radiation situations. The results show variations in temperature distribution, conductivity, and skin friction coefficient among the three mixing compositions.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Mechanics
Guijun Xian, Rui Guo, Chenggao Li
Summary: The study investigated the mechanical properties of carbon/glass fiber hybrid plates and found that the random fiber hybrid mode helps to synergize the carbon and glass fibers and enhance mechanical performance. Furthermore, compared to the core-shell hybrid mode, the random hybrid mode showed a more significant increase in tensile and flexural strength after 360 days.
COMPOSITE STRUCTURES
(2022)
