Article
Mathematics, Applied
Lin Qiu, Minghui Zhang, Qing-Hua Qin
Summary: This paper introduces a scheme derived from the homogenization function for solving the time-fractional inverse heat conduction problem in three-dimensional functionally graded materials. The method is validated for accuracy, efficiency, and convergence through two examples, demonstrating its effectiveness without the need for traditional meshing, integration, and regularization techniques.
APPLIED MATHEMATICS LETTERS
(2021)
Article
Materials Science, Composites
Jiao Li, Guangchun Wang, Jianghu Zhan, Shuai Liu, Yanjin Guan, Hakim Naceur, Daniel Coutellier, Jun Lin
Summary: Transient heat conduction analysis of functionally graded structures is performed using the smoothed particle hydrodynamics (SPH) method. A symmetric SPH approach is adopted to improve computational accuracy and efficiency, with validation done against analytical values and FEM results. The study presents an alternative potential method for heat conduction analysis of functionally graded materials.
COMPOSITES COMMUNICATIONS
(2021)
Article
Mathematics, Applied
Kyungtae Min, Minkyu Oh, Cheolwoong Kim, Jeonghoon Yoo
Summary: This study proposes a novel method for the structural design of thermal conductors using functionally graded materials (FGMs). The effective thermal conductivity of the FGM composite is determined through the representative volume element (RVE) homogenization method under periodic boundary conditions. A neural network fitting approach is used to build a prediction module for the effective thermal conductivity corresponding to shape changes of the unit structure. The optimization process simultaneously optimizes the overall topological layout and local fibrous material layout to maximize thermal conduction performance.
FINITE ELEMENTS IN ANALYSIS AND DESIGN
(2023)
Article
Engineering, Multidisciplinary
Lin Qiu, Ji Lin, Fajie Wang, Qing-Hua Qin, Chein-Shan Liu
Summary: This method proposes a simple and effective way to solve inverse heat source problems in functionally graded materials, eliminating the need for mesh generation, numerical integration, iteration, regularization, and fundamental solutions. The heat source problems are solved directly by calculating a linear matrix system, making it easy to program and implement.
APPLIED MATHEMATICAL MODELLING
(2021)
Article
Mechanics
Seymur Hasanov, Ankit Gupta, Frank Alifui-Segbaya, Ismail Fidan
Summary: This research investigates the characterization of Functionally Graded Materials (FGMs) fabricated by fused filament fabrication (FFF), focusing on the effects of direct and gradual transition fiber reinforcement on interface strength and material properties. The study demonstrates that homogenization and finite element analysis can accurately predict the effective properties of FFF-made FGMs, with homogenized values closely matching experimental results. Overall, this work represents an important step towards enabling effective design and analysis of composite structures through experimental characterization and computational methodology.
COMPOSITE STRUCTURES
(2021)
Article
Mathematics, Applied
Amin Emamian, Amin Amiri Delouei, Sajjad Karimnejad, Dengwei Jing
Summary: An analytical solution is obtained for the temperature distribution in a cylindrical shell made of functionally graded material, with particular emphasis on the dominant role of convective cooling. The obtained solution is validated using numerical data and tested for practical problems with different boundary conditions. Parametric studies reveal that boundary conditions play a dominant role in the cooling rate, while the material constant has no significant effect on the temperature distribution. This study can contribute to the improvement of design and production processes for cylindrical shells made of functionally graded material.
MATHEMATICAL METHODS IN THE APPLIED SCIENCES
(2023)
Article
Engineering, Manufacturing
Mirhan Ozdemir, Ugur Simsek, Gullu Kiziltas, Cemal Efe Gayir, Alican Celik, Polat Sendur
Summary: Triply periodic minimum surface (TPMS) lattice structures have gained interest in engineering applications due to their excellent mechanical properties. Hybridization of different lattice types is proposed to enhance the design performance. In this study, a hybrid optimization scheme based on genetic algorithms and anisotropic homogenization-based topology optimization is applied to a MBB beam design. The best lattice morphology is identified using GA and then further optimized using homogenization-based topology optimization. The graded multi-morphology lattice is reconstructed using a blending algorithm and manufactured using the DMLM technique. Experimental results show that the stiffness of the graded multi-morphology structure is higher than the graded and uniform single lattice morphologies.
ADDITIVE MANUFACTURING
(2023)
Article
Computer Science, Interdisciplinary Applications
Fabio M. Conde, Pedro G. Coelho, Jose M. Guedes
Summary: This research focuses on the topology optimization of periodic composite material unit cell under multi-material setting, showing that multi-material microstructures can be stiffer compared to single-material ones. Lower stress peaks are obtained in bi-material design solutions, especially in the case of graded material solutions, which excel in stress mitigation. The multi-material setting impacts favorably on structural performance, in terms of both stiffness and strength-oriented designs.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2022)
Article
Mathematics, Applied
Yuhui Zhang, Timon Rabczuk, Jun Lu, Shifa Lin, Ji Lin
Summary: An efficient space-time backward substitution method (STBSM) is proposed for solving nonlinear transient heat conduction problems in 2D and 3D functionally graded materials (FGMs). By introducing space-time radial basis function (STRBF) and space-time trigonometric basis function (STTBF), the computation efficiency of the traditional backward substitution method (BSM) for transient problems is improved. The time dimension is considered as a pseudo-space dimension and transformed into a (d + 1)-dimensional steady-state governing equation. The accuracy and efficiency of the proposed method are verified through several examples.
COMPUTERS & MATHEMATICS WITH APPLICATIONS
(2022)
Article
Mechanics
Marco Montemurro, Khalil Refai, Anita Catapano
Summary: This study introduces a numerical method to predict the effective thermal conductivity of cellular materials with periodic micro-structures obtained through additive manufacturing. Results show that the macroscopic thermal conductivity of ACMs is strongly influenced by relative density and RVE geometry, and a gradient design was achieved through an optimization method.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Civil
Nam Nguyen, Duc-Huynh Phan
Summary: Understanding nonlinear behavior in advanced engineering structures is crucial for analysis, design, and manufacturing processes. This paper focuses on exploring the nonlinear free vibrational characteristics of bi-directional functionally graded plates with internal pores under various conditions. An approximate numerical model is used to calculate the displacement field, and the nonlinearity in free vibration is assessed using an iterative scheme. Comprehensive parametric investigations are conducted to gain insight into the impact of various factors on the nonlinear free vibration characteristics of plate structures.
THIN-WALLED STRUCTURES
(2023)
Article
Mathematics, Applied
Zhuo-Jia Fu, Li-Wen Yang, Qiang Xi, Chein-Shan Liu
Summary: This paper presents a method to solve anomalous heat conduction problems under functionally graded materials using SBM, DRM, and Laplace transformation technique. It achieves high accuracy by combining these methods and avoiding the impact of time step on computational efficiency. The transient heat conduction equation with Caputo time fractional derivative is used to describe the phenomena, demonstrating the effectiveness of the proposed method through numerical examples and comparisons with analytical solutions and COMSOL simulations.
COMPUTERS & MATHEMATICS WITH APPLICATIONS
(2021)
Article
Mechanics
Mohamed El Ibrahimi, Abderrahim Samaouali
Summary: This paper studies the steady-state heat transfer through a functionally graded plate in ultrahigh temperature environment with temperature-dependent thermal conductivity. The logarithmic nonlinearity in the differential equation is addressed and solved using an appropriate algorithm. The Newton Raphson method is applied to handle the nonlinearity of the radiative boundary condition, resulting in fast convergence and good agreement with previous methods.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Mechanical
Ying Zhou, Liang Gao, Hao Li
Summary: This study proposes an optimization method for the design of infill for free-form surfaces. The method simultaneously optimizes the microstructural geometry and macroscopic distribution of the infills. It utilizes a local level sets approach to generate graded and connectable infill microstructures, and employs cubic polynomials interpolation to predict their effective properties. A computational conformal mapping technology is used to map the geometry between the 3D surface and a 2D parameter space, allowing the infill units to fit the curved surface without losing any geometric feature. The infill optimization problem is then recast as a 2D optimization problem defined in the parameter domain.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Mathematics, Applied
M. S. Barak, Priti Dhankhar
Summary: This research focuses on the analysis of disturbances induced in a rotating, nonlocal, functionally graded, transversely isotropic thermoelastic half-space due to the application of a mechanical load based on the Lord-Shulman theory. The study obtains exact expressions of the normal displacement, stress components, and temperature field through normal mode analysis. The numerical and graphical results show that the nonlocal parameter, material's anisotropy, nonhomogeneity parameter, rotation parameter, and time significantly affect all the physical fields. Certain specific cases of interest are also deduced from the investigation.
ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK
(2023)
Article
Computer Science, Interdisciplinary Applications
Xuyu Zhang, Yi Min Xie, Shiwei Zhou
Summary: This study proposes a nodal-based evolutionary design optimization algorithm for designing frame structures. By using Delaunay triangulation as the edge boundary, it extends the space of admissible solutions and reduces the number of design variables. Through sensitivity analysis and the method of moving asymptotes, the optimal structure can be obtained within a few iterations.
COMPUTER-AIDED CIVIL AND INFRASTRUCTURE ENGINEERING
(2023)
Article
Geriatrics & Gerontology
Na Li, Runan Luo, Wenlong Zhang, Yu Wu, Chaojie Hu, Manli Liu, Diya Jiang, Ziran Jiang, Xinxin Zhao, Yiping Wang, Qing Li
Summary: The study reveals that IL-17A can promote endothelial cell aging by activating the JNK signaling pathway and upregulating FTO expression. This discovery is significant for the identification of new therapeutic targets against endothelial cell aging and related vascular complications.
Article
Mechanics
Wen Zuo, Quantian Luo, Qing Li, Guangyong Sun
Summary: Thin-walled structures made of fiber reinforced composites are commonly used in engineering practice, but there is limited research on their residual properties after high temperature and hygrothermal aging. This experimental investigation aims to study the effects of moisture absorption and high temperatures on the mechanical characteristics of fiber reinforced plastic composite tubes. The study found that crashworthiness characteristics decrease significantly with increased temperature and moisture absorption rate. The failure modes varied and were influenced by the glass transition temperature of the matrix. Moisture absorption had two stages and was affected by temperature. Microscopically, the morphology and bonding conditions between fiber and resin changed significantly due to temperature and hydrothermal aging.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Biomedical
Ali Entezari, Nai-Chun Liu, Zhongpu Zhang, Jianguang Fang, Chi Wu, Boyang Wan, Michael Swain, Qing Li
Summary: Despite advances in bone scaffold design optimization, their functionality remains suboptimal due to uncertainties caused by the manufacturing process. A novel multi-objective robust optimization approach is proposed to minimize the effects of uncertainties on the optimized design. This study presents the first non-deterministic optimization of tissue scaffold, shedding light on the significant topic of scaffold design and additive manufacturing.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Computer Science, Interdisciplinary Applications
Zicheng Zhuang, Yi Min Xie, Qing Li, Shiwei Zhou
Summary: This article presents the implementation of topology optimization in unstructured triangular mesh using the TriTOP172 Matlab code. The code eliminates zig-zag boundaries commonly found in rectangular mesh and includes functions for setup, optimization iterations, body-fitted mesh generation, boundary smoothing, and finite element analysis. Numerical examples are provided to demonstrate the algorithm's effectiveness. The code can be extended for complex conceptual design problems in various engineering fields. The educational program is available in the Appendix.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2023)
Review
Engineering, Civil
Xiaojiang Lv, Zhi Xiao, Jianguang Fang, Qing Li, Fei Lei, Guangyong Sun
Summary: This paper provides a comprehensive review on the state-of-the-art assessments and design of frontal structures for protecting vulnerable road users (VRU). It evaluates impact-induced injury mechanisms of different body parts, compares safety regulations and assessment procedures for VRU protection, outlines experimental testing platforms for different VRU impacts, introduces virtual test systems, discusses various front-end structure designs for reducing VRU injuries, and reviews design optimization techniques and other protective measures for VRU.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Biomedical
Yunduo Charles Zhao, Yingqi Zhang, Fengtao Jiang, Chi Wu, Boyang Wan, Ruhma Syeda, Qing Li, Bo Shen, Lining Arnold Ju
Summary: Mechanical stimuli generated by body exercise can be transmitted from cortical bone into the deep bone marrow. A mechanosensitive perivascular stem cell niche has been identified within the bone marrow for osteogenesis and lymphopoiesis. However, the mechanopropagation from compact bone to deep bone marrow vasculature remains unclear. In this study, an integrated computational biomechanics framework was devised to quantitatively evaluate the effects of exercise-induced mechanical stretching on bone marrow vasculature.
ADVANCED HEALTHCARE MATERIALS
(2023)
Review
Engineering, Mechanical
Yaozhong Wu, Jianguang Fang, Chi Wu, Cunyi Li, Guangyong Sun, Qing Li
Summary: Lightweight materials and structures have been extensively studied for design and manufacturing of more sustainable products with reduced materials and energy consumption, while maintaining proper mechanical and energy absorption characteristics. Additive manufacturing techniques have offered more freedom for designing novel lightweight materials and structures, but the rational design for desired mechanical properties remains challenging. This review comprehensively discusses the recent advances in additively manufactured materials and structures, focusing on their mechanical properties and energy absorption applications. It also addresses challenges, future directions, and optimization techniques in this field.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Ergonomics
Yitao Ma, Qiang Liu, Jie Fu, Kangmin Liufu, Qing Li
Summary: In a mixed traffic environment, connected vehicle platoons face a high risk of collision in lane change scenarios due to the lack of communication and collaboration with surrounding non-connected vehicles. Therefore, a collision-avoidance lane change control method is proposed for a connected bus platoon to safely elude non-connected vehicles. This method utilizes a sensor system with multiple sensors in longitudinal and lateral directions and a platoon controller based on vehicle-to-vehicle (V2V) communication. Experimental results show that the proposed method significantly improves the safety of platoon vehicles in mixed traffic scenarios.
ACCIDENT ANALYSIS AND PREVENTION
(2023)
Article
Mechanics
Yu Lu, Qiang Liu, Zengbo Zhang, Liuye Qin, Qing Li
Summary: This study aimed to investigate the responses of riveted-bonded hybrid joints connecting CFRP and Al under tensile and cross tensile loads. Different locking modes were fabricated and analyzed. The mechanical properties and failure mechanisms were studied and compared. Numerical models were established to replicate the failure behaviors and identify damaged areas.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Multidisciplinary
Dapeng Wang, Dequan Zhang, Yuan Meng, Meide Yang, Chuizhou Meng, Xu Han, Qing Li
Summary: With the increasing complexity of engineering problems, traditional reliability analysis methods face challenges in terms of computational efficiency and accuracy. The Kriging model, a surrogate model, has been widely used in reliability analysis due to its advantages in computational efficiency and numerical accuracy. However, there are still significant issues with the Kriging model-assisted reliability analysis, such as the need for a large candidate sample pool and excessive local prediction accuracy. To address these issues, a new method called AK-HRn, which combines adaptive Kriging and n-hypersphere rings, is proposed in this study. The AK-HRn method demonstrates high efficiency and robustness in solving complex reliability analysis problems.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
Article
Engineering, Mechanical
Cunyi Li, Jianguang Fang, Yuheng Wan, Na Qiu, Grant Steven, Qing Li
Summary: This study aims to develop a phase field framework for simulating the complex mechanical behaviors of laser powder bed fusion printed metallic materials. By considering the microstructural orientation induced by laser powder bed fusion, transversely isotropic Hill48 and modified Mohr-Coulomb constitutive models are incorporated to describe plasticity and fracture behaviors respectively. The proposed phase field model is able to better reproduce force-displacement responses of all specimens by considering the stress state-dependent crack initiation. Moreover, applying a transversely isotropic fracture model is necessary to accurately predict the crack path and global force-displacement responses.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Review
Engineering, Civil
Ruyang Yao, Tong Pang, Bei Zhang, Jianguang Fang, Qing Li, Guangyong Sun
Summary: This article provides a comprehensive overview of recent advances in the development of thin-walled multi-cell structures and materials (TWMCSM) for crashworthiness and protection applications in various vehicles. It covers the classification of TWMCSM, commonly-used manufacturing methods, energy absorption mechanism and characteristics, experimental testing and numerical modeling techniques, key parameters affecting crashworthiness, analytical modeling methods, design optimization procedures, typical applications and future research directions. It aims to provide informative references and a comprehensive landscape for researchers and engineers in designing new TWMCSM for better energy absorption and crashworthiness.
THIN-WALLED STRUCTURES
(2023)
Article
Dentistry, Oral Surgery & Medicine
Pongsakorn Poovarodom, Chaiy Rungsiyakull, Jarupol Suriyawanakul, Qing Li, Keiichi Sasaki, Nobuhiro Yoda, Pimduen Rungsiyakull
Summary: This study aimed to evaluate the influence of subcrestal implant placement depth on bone remodeling using time-dependent finite element analysis (FEA) with a bone-remodeling algorithm. The study found that deeper implant placement can increase bone density, but it also increases the maximum von Mises stress and overloading elements.
JOURNAL OF PROSTHODONTIC RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Deyong Zheng, Huihui Jin, Yucong Liao, Pengxia Ji
Summary: In this study, a highly stable and efficient catalyst, fluorine-doped Co3O4 (F-Co3O4), was developed for hydrogen production by water electrolysis. The F-Co3O4 catalyst exhibited a remarkable reduction in overpotential and demonstrated excellent stability for over 100 hours.
Article
Materials Science, Multidisciplinary
Ziwen Lv, Jintao Wang, Fengyi Wang, Jianqiang Wang, Fuquan Li, Hongtao Chen
Summary: Adding Cu6Sn5 nano particles can effectively inhibit the overgrowth of intermetallic compounds at the interfaces of solder joints in electronic devices, providing a solution to this issue. A new growth mechanism of intermetallic compounds at the interfaces was identified.
Article
Materials Science, Multidisciplinary
Jun Wang, Jiawei Chen, Wanru Liao, Fangyang Liu, Min Liu, Liangxing Jiang
Summary: A BiOI/AgI/Ag plasmonic heterostructure photocathode was successfully designed through electrodeposition, ion-exchange, and illumination methods. This photocathode exhibits superior performance in photoelectrochemical water splitting.
Article
Materials Science, Multidisciplinary
Xiaoxiao Liu, Xianxian Zhou, Xiaotao Ma, Qinbo Yuan, Shibin Liu
Summary: In this study, the authors propose a method to accelerate the reaction of polysulfides in lithium-sulfur batteries using a Ni@OC Mott-Schottky heterojunction as a catalyst. The experimental results demonstrate that the charge redistribution at the Ni@OC interface accelerates electron transfer and enhances catalytic activity, leading to improved reaction kinetics and battery performance.
Article
Materials Science, Multidisciplinary
Dayou Ma, Mohammad Rezasefat, Joziel Aparecido da Cruz, Sandro Campos Amico, Marco Giglio, Andrea Manes
Summary: The matrix has a significant effect on the impact resistance of composite materials. Replacing a brittle polymer with a more flexible one can improve impact resistance, but it poses challenges to standard testing methods. This study designs a new fixture for testing the low-velocity impact of soft composites and investigates the effect of the fixture on the mechanical performance.
Article
Materials Science, Multidisciplinary
Lingchang Wang, Qihang Yang, Huzhen Li, Ming Wei, Qian Wang, Zhenzhong Hu, Mengmeng Zhen
Summary: Bronze titanium dioxide (TiO2(B)) is a promising anode material for lithium-ion batteries due to its high specific capacity. However, its practical applications are hindered by poor conductivity and limited electrochemical kinetics. In this study, TiO2(B)-carbon nanosheets heterostructures are synthesized to enhance the cycling performance and rate capability of TiO2(B).
Article
Materials Science, Multidisciplinary
Atul Thakur, Ritesh Verma, Ankush Chauhan, Fayu Wan, Preeti Thakur
Summary: In this study, BaFe12O19 and BaFe12O19: Epoxy (50:50) nanocomposites were synthesized using the co-precipitation method. The structural information and material properties, such as crystallite size and electrical conductivity, were characterized by XRD, FESEM, EDX, and TEM techniques.
Article
Materials Science, Multidisciplinary
Jingyu Wu, Xinyan Ma, Yong Yang
Summary: A well-defined CoS2@NC(CS-500) hierarchical binder-free catalyst cathode is constructed through in-situ grown of ZIF-67 on carbon cloth and high-temperature carbonization. The cathode shows excellent reaction kinetics and electrochemical performance, providing inspiration for developing advanced Li-CO2 battery catalysts.
Article
Materials Science, Multidisciplinary
Svetlana M. Posokhova, Vladimir A. Morozov, Kirill N. Boldyrev, Dina Deyneko, Erzhena T. Pavlova, Bogdan I. Lazoryak
Summary: This study explores the impact of synthesis method and composition on the structure and luminescence properties of K5Eu1-xHox(MoO4)4 with the palmierite-type matrix. The co-doping of Eu3+ and Ho3+ ions plays a critical role in manipulating charge transfer and luminescence efficiency in the visible and infrared regions.
Article
Materials Science, Multidisciplinary
Jian Wang, Yeting Tao, Jingsheng Wang, Youtian Tao
Summary: A new electron-transport material iTPyBI-CN is developed through non-catalytic C-N coupling reaction. It exhibits better electroluminescence efficiency in organic light-emitting diodes compared to the commercial material TPBI, due to its twisted geometry and higher energy levels.
Article
Materials Science, Multidisciplinary
Tao Zhu, Feng Huang, Shuo Li, Yang Zhou
Summary: This article combines XRD analysis and microscopic structural observation to investigate the changes in limestone after high-temperature treatment. It finds that 500 degrees C is the critical temperature for crystalline and spatial arrangement changes in limestone, and the thermal conductivity, specific heat capacity, and heat storage coefficient gradually decrease after thermal treatment.
Article
Materials Science, Multidisciplinary
Muhammad Haekal Habibie, Fransiska Sri Herwahyu Krismastuti, Abdi Wira Septama, Faiza Maryani, Vivi Fauzia
Summary: This study focuses on the synthesis of zinc oxide nanostructure from zinc recovered from galvanization ash and highlights its potential as a sustainable source of zinc and as an antibacterial agent.
Article
Materials Science, Multidisciplinary
Jingyi Li, Yixin Xing, Wei Gu, Shousi Lu
Summary: In this study, PC@CaP microparticles were fabricated using biomimetic mineralization. The results showed that under environmental stress, PC@CaP exhibited improved stability and antioxidative activity, indicating its potential use in high-added value fields.
Article
Materials Science, Multidisciplinary
Yan Liu, Shunyou Chen
Summary: In this study, TNTs were used as a drug carrier and modified with ZIF-8 and silk fibroin to obtain a new drug loading platform. The results showed that this drug-loaded platform had a good drug release effect in vitro and could promote cell proliferation and osteogenic differentiation.
Article
Materials Science, Multidisciplinary
Chunhui Zhu, Wentao Wang, Qing Zhen, Xinning Huang, Shixin Li, Shaochang Wang, Xiaoping Ma, Xiaoxia Liu, Yalong Jiao, Kai Sun, Zhuangzhi Li, Huaixin Yang, Jianqi Li
Summary: A type of stacking fault is revealed in e-InSe crystal, which is associated with a small stacking-fault energy and shows exceptional plasticity.
