Article
Engineering, Multidisciplinary
Jing Zheng, Xuanpei Rong, Chao Jiang
Summary: This paper proposes a thermoelastic topology optimization method that takes into account the temperature-dependent material properties. It formulates a mathematical model and algorithm to optimize the structure design considering these properties. Numerical examples are provided to demonstrate the effectiveness of the method and illustrate the significant influence of temperature-dependent material properties.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2023)
Article
Engineering, Multidisciplinary
Yuan Chen, Lin Ye, Y. X. Zhang, Chunhui Yang
Summary: This study investigates a novel multi-material topology optimization scheme considering temperature-dependent thermoelastic properties for engineering structure design. Results show that the temperature-dependent elastic modulus dominantly influences design outcomes, while the temperature-dependent thermal expansion coefficient plays a crucial role in material distribution and structural geometry.
ENGINEERING OPTIMIZATION
(2022)
Article
Mechanics
Subhendu Pal, Mrutyunjay Rout, Amit Karmakar
Summary: In this study, the fundamental frequency of a rotating cantilevered porous functionally graded twisted conical shell with varying thickness was calculated using a trigonometric higher-order shear deformation theory. Finite element method was utilized to discretize the shell and a parametric investigation was conducted to understand the effects of taper ratio, porosity, pretwist angle, temperature, and rotational speed on the fundamental frequency and mode shapes.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2023)
Article
Mathematics, Applied
Xin Lyu, Liaoliang Ke, Jiayong Tian, Jie Su
Summary: This paper studies the contact vibration problem of an elastic half-space coated with functionally graded materials (FGMs) subject to a rigid spherical punch. The static contact problem of FGMs is solved by a least-square fitting approach, and the dynamic contact pressure is solved using the perturbation method. The dynamic contact stiffness with different dynamic contact displacement conditions is derived, and the effects of various parameters on the dynamic contact stiffness factor are discussed.
APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION
(2022)
Article
Thermodynamics
Amir Najibi, Parisa Alizadeh, Payman Ghazifard
Summary: In this study, a nonlinear transient thermo-elastic analysis was conducted on a thick hollow 1D-FGM axisymmetric cylinder with finite length using higher-order graded finite element method. The results indicate that functionally graded cylinder walls perform better in terms of both stress and temperature compared to non-FGM cylinder walls.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Mechanics
Baker Wael Abuteir, Djamel Boutagouga
Summary: This article examines the free vibration response of functionally graded cylindrical and spherical porous shells with temperature-dependent material properties. The effective material properties are determined using the rule of mixture with porosity phases. The equation of motion is derived based on a curved 8-node degenerated shell element formulation. The study focuses on two different material mixtures and investigates the influence of material constituents, power-law indexes, boundary conditions, radius to thickness ratio, porosity parameter, and temperature gradient on the natural frequencies.
Article
Mechanics
Peng-Fei Dang, Zheng-Xin Yang, Yang-Yang Yan, Qing-Kai Han, Zhi-Hao Jin
Summary: This paper studied the influence of temperature rise on the vibration characteristics of rotating composite blades with thermal barrier coatings (TBCs) using dynamic model and nonlinear vibration analysis. The results show that the temperature rise enhances the softening-type nonlinearity of rotating blades.
COMPOSITE STRUCTURES
(2021)
Article
Mathematics, Applied
Ankit Bajpai, P. K. Sharma, Rajneesh Kumar
Summary: A mathematical model was developed to study thermoelastic diffusion in materials with temperature-dependent elastic properties, using two temperature fractional order theory. The governing equations for the problem were derived and non-dimensionalized, leading to analytical solutions for physical quantities displayed graphically to illustrate various physical effects.
ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK
(2021)
Article
Mathematics, Applied
Wei Peng, Like Chen, Tianhu He
Summary: Functionally graded materials (FGMs) exhibit excellent thermal shock resistance, and the size-dependent effect becomes important at micro-scale, requiring the use of nonlocal generalized thermoelastic theory. The study formulates governing equations for a simply supported FGM microbeam heated by ramp-type heating using Laplace transform techniques, and presents numerical results discussing the effects of ramp-heating time parameter, nonlocal parameter, and power-law index.
APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION
(2021)
Article
Engineering, Mechanical
Zewu Wang, Junbao Li, Haigui Fan, Dapeng Hu
Summary: Although the thermal buckling problem of FGM cylindrical shells has been studied for many years, its theoretical solution considering temperature-dependent material properties is rarely reported. This study derived the theoretical solution of critical temperature rise based on the Donnell thin shell theory and developed a stepped layer discrete finite element model to calculate the critical temperature rise. The results showed good agreement between theoretical and numerical solutions and revealed that temperature has a significant negative effect on the thermal buckling resistance of FGM-coated cylindrical shells. The study also discussed the influencing factors on critical temperature rise and proposed suggestions to improve calculation accuracy. This work provides a theoretical calculation formula and a numerical method to facilitate the design of FGM-related structures.
JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME
(2023)
Article
Engineering, Civil
Mokhtar Ellali, Mokhtar Bouazz, Ashraf M. Zenkour
Summary: The objective of this work is to study the wave propagation of an FGM plate with temperature-dependent material properties using a new integral inverse shear model. A new model based on a high-order theory field of displacement is proposed, which includes indeterminate integral variables and inverse co-tangential functions for the representation of shear stress. The effects of temperature and volume fraction distributions on wave propagation of the FGM plate are investigated, and the results are compared with previous research on dispersion and phase velocity curves.
GEOMECHANICS AND ENGINEERING
(2023)
Article
Mathematics, Applied
Hamed Panahi-Kalus, Amin Moosaie, Mehrdad Ahmadinejad
Summary: This paper investigates a non-linear static, two-dimensional thermoelastic analysis in the radial and tangential directions of a cylindrical shell made of functionally graded materials. The heat governing equations are non-linear due to the dependence of material properties on temperature. The temperature field is obtained analytically by linearizing the heat conduction equation and using a linearizing transformation, and the elasticity equations are solved numerically using a second-order central finite difference method. The results depict the temperature field, stress, and displacement distributions, and analyze the effect of inhomogeneous parameters on them. The accuracy of the analytical solution is confirmed by comparing it with the numerical solution, showing a good agreement.
ADVANCES IN APPLIED MATHEMATICS AND MECHANICS
(2023)
Article
Mechanics
Francesco S. Liguori, Domenico Magisano, Leonardo Leonetti, Giovanni Garcea
Summary: This work introduces a cost-effective and reliable numerical framework for geometrically nonlinear thermoelastic analyses of thin-walled structures. The approach includes isogeometric solid-shell formulation for accurate geometry approximation and a generalised arc-length method for solving the equations efficiently. The framework also features a consistent definition of tangent operators and a mixed integration point strategy for robust analysis.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Multidisciplinary
A. Hajlaoui, E. Chebbi, F. Dammak
Summary: This paper analyzes the thermal buckling behavior of functionally graded shell structures using a modified first-order enhanced solid-shell element formulation. Both temperature-independent and temperature-dependent material properties are considered, with shear strains accounted for through the thickness of the shell. Various methods are employed to address locking issues, and numerical results are validated with existing studies. The effect of different parameters on thermal buckling temperature is highlighted through solving numerous examples.
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
(2021)
Article
Mechanics
M. D. Iqbal, C. Birk, E. T. Ooi, A. L. N. Pramod, S. Natarajan, H. Gravenkamp, C. Song
Summary: The scaled boundary finite element method is extended to model fracture in functionally graded materials under coupled thermo-mechanical loads. The proposed technique is validated through numerical examples for isotropic and orthotropic FGMs.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Engineering, Civil
Jian Xue, Weiwei Zhang, Jing Wu, Chao Wang, Hongwei Ma
Summary: This study integrates a plate-type local resonator with varying free boundaries within a plate to convert the initial low-order global vibration modes into localized vibration modes. A novel semi-analytical method is proposed to analyze the free vibration of the plate with thickness and displacement discontinuities. The results show that by applying free boundary conditions, the low-order localized vibration frequencies can be significantly reduced without affecting the low-order global frequencies.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Merve Tunay
Summary: In recent years, there has been an increasing number of studies on the mechanical properties of sandwich structures manufactured with the Fused Deposition Modeling (FDM) method. However, there is still a lack of experimental data on the mechanical characteristics of FDM-manufactured sandwich structures under different thermal aging durations. In this experiment, the energy absorption capabilities of sandwich structures with different core geometries were investigated under various thermal aging durations. The results showed that the core topology significantly influenced the energy absorption abilities of the sandwich structures.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Zi-qin Jiang, Zi-yao Niu, Ai-Lin Zhang, Xue-chun Liu
Summary: This paper proposes a crosssection corrugated plate steel special-shaped column (CCSC) that improves the bearing capacity and overall stability of structural columns by using smaller material input. Through theoretical analysis and numerical simulation, the overall stability of the CCSC under axial compression is analyzed. The design method and suggestions for the stability of CCSC are put forward. Compared with conventional square steel tube columns, the CCSC has obvious advantages in overall stability and steel consumption.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Yong Zhang, Yangang Chen, Jixiang Li, Jiacheng Wu, Liang Qian, Yuanqiang Tan, Kunyuan Li, Guoyao Zeng
Summary: A hybrid TPMS method was proposed to develop a new TPMS structure, and the mechanical properties of different TPMS structures were studied experimentally and numerically. Results showed that the hybrid TPMS structure had higher energy absorption and lower load-carrying capacity fluctuation. Further investigations revealed that the topological shape and material distribution had significant influence on mechanical properties, and the hybrid additive TPMS structure exhibited significant crashworthiness advantage in in-plane crushing condition.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Tongfei Sun, Ye Liu, Kaoshan Dai, Alfredo Camara, Yujie Lu, Lijie Wang
Summary: This paper presents a series of experimental and numerical studies on the performance of a novel double-stage coupling damper (DSCD). The effects of damper configuration, friction-yield ratio (Rfy), and loading protocol on the hysteresis performance of the DSCD are investigated. The test results demonstrate that the arrangement of ribs in the DSCD increases its energy dissipation capacity. Numerical analysis reveals that the length of the friction mechanism and the clearance between the yield segment and the restraining system affect the energy dissipation and stability of the damper.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Jeonghwa Lee, Young Jong Kang
Summary: This study investigates the local buckling behavior and strength of I-shape structural sections by considering flange-web interactions through three-dimensional finite element analysis. The study provides a more reasonable estimation of local buckling strength by considering the ratio of flange-web slenderness and height-to-width ratio, and presents design equations for flange local and web-bend buckling coefficients.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Yizhe Chen, Wenfeng Xiang, Qingsong Zhang, Hui Wang, Lin Hua
Summary: This study investigates the surface modification of a nickel plate to improve the bonding strength with carbon fiber-reinforced plastics (CFRP). The results show that different surface modification methods, including sandblasting, coupling agent treatment, and compound coupling agent treatment, significantly enhance the bonding strength of CFRP/Ni joints. The research provides insights into improving the connection between nickel and CFRP, as well as other heterogeneous materials.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Agha Intizar Mehdi, Fengping Zhang, Moon-Young Kim
Summary: A spatial stability theory of mono-symmetric thin-walled steel beams pre-stressed by spatially inclined cables is derived and its validity is demonstrated through numerical examples. The effects of initial tension, deviator numbers, inclined cable profiles, and bonded/un-bonded conditions on lateral-torsional buckling of the pre-stressed beams are investigated, with a specific emphasis on the effects of increasing initial tension.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Teng Ma, Jinxiang Wang, Liangtao Liu, Heng Li, Kui Tang, Yangchen Gu, Yifan Zhang
Summary: The structural response of water-back plate under the combined action of shock wave and bubble loads at water depths of 1-300 m was numerically investigated using an arbitrary Lagrange-Euler method. The accuracy of the numerical model was validated by comparing with experimental and theoretical results. The influences of water depth and length-to-diameter ratio of the charge on the combined damage effect were analyzed. The results show that as water depth increases, the plastic deformation energy of the water-back plate decreases, and the permanent deformation mode changes from convex to concave. When the charge has a large length-to-diameter ratio, the plastic deformation energy of the radial plate is higher than that of the axial plate, and the difference decreases with increasing water depth. Increasing the length-to-diameter ratio enhances the combined damage effect in the radial direction in deep-water environments.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Qiu-Yun Li, Ben Young
Summary: This paper investigates the flexural performance of CFS zed section members bent about the neutral axis parallel to the flanges through experimental and numerical analysis. The results show that the current direct strength method generally provides conservative predictions for the flexural strength of unstiffened zed section members, but slightly unconservative design for edge-stiffened zed section beams. The nominal flexural strengths of zed section members with edge stiffeners were found to be underestimated by 17% to 21% on average. Modified DSM formulae are recommended for the design of CFS zed section beams.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Weinan Gao, Bo Song, Xueyan Chen, Guochang Lin, Huifeng Tan
Summary: This paper presents a precise method for predicting deformation in large-scale inflatable structures, utilizing finite element modeling and laser scanning technique. The study shows a good agreement between the predictive model and non-contact measurement results.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Fei Gao, Zongyi Wang, Rui Zhu, Zhenming Chen, Quanxi Ye, Yaqi Duan, Yunlong Jia, Qin Zhang
Summary: This research investigates the mechanical properties of high-strength ring groove rivet assemblies and the load resistances of riveted T-stubs. Experimental tests reveal that Grade 10.9 rivets have higher yield strength and strain, and lower ultimate strain, making them suitable for high-strength ring groove rivet connections. Increasing the rivet diameter benefits the T-stubs, while increasing the flange thickness is not always advantageous. The Eurocode 3 method is not suitable for T-stubs connected through ring groove rivets, while the Demonceau method is conservative.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Shangchun Jiang, Liangfeng Sun, Haifei Zhan, Zhuoqun Zheng, Xijian Peng, Chaofeng Lue
Summary: This study investigates the bending behavior of two-dimensional nanomaterials, diamane and its analogous structure TBGIB, through atomistic simulations. It reveals that diamane experiences structural failure under bending, while TBGIB bends elastically before undergoing structural failure. The study provides valuable insights for the application of these materials in flexible electronics.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Qiang Zhang, Jianian Wen, Qiang Han, Hanqing Zhuge, Yulong Zhou
Summary: In this study, the mechanical properties of Q690 steel H-section columns under bi-directional cyclic loads are investigated, considering the time-varying characteristics of corrosion. A refined finite element (FE) model is built to analyze the degradation of mechanical property and failure mechanisms of steel columns with different design parameters during the whole life-cycle. The study proposes a quantitative calculation method for the ultimate resistance and damage index of steel columns, taking into account the ageing effects. The findings emphasize the importance of considering the ageing effects of steel columns in seismic design.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Yuda Hu, Qi Zhou, Tao Yang
Summary: The magneto-thermo-elastic coupled free vibration of functionally graded materials cylindrical shell is investigated in this study. The vibration equation in multi-physical field is established and solved using the Hamilton principle and the multi-scale method. The numerical results show that the natural frequency is influenced by various factors such as volume fraction index, initial amplitude, temperature, and magnetic induction intensity.
THIN-WALLED STRUCTURES
(2024)