Article
Acoustics
Pelin Berik, Ayech Benjeddou
Summary: This study experimentally and numerically assesses smart sandwich cantilevers with aluminum faces and single and double cores for the first time. The results indicate that the electromechanical coupling efficiency of the smart structures can be improved by using multilayer designs.
JOURNAL OF VIBRATION AND CONTROL
(2022)
Article
Materials Science, Multidisciplinary
Md. Irquam Alam, Mihir Kumar Pandit, Arun Kumar Pradhan
Summary: A modified higher-order zigzag theory (HOZT) is proposed for static analysis of laminated composites/sandwich shells, which considers transverse shear and normal strain. The model assumes in-plane displacement fields that vary as a combination of globally cubic and locally zigzag linearly varying fields. The transverse displacement field varies quadratically. The accuracy of the model is validated through comparisons with 3D-elasticity solution and other literature results.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Yunfa Zhou, Changsheng Zheng, Hanchang Wang, Qiang Han, Jiansen Shen
Summary: This work investigates the dynamic characteristics of composite damping sandwich open conical shells. The study derives the expressions of kinetic energy and strain energy based on the first-order shear deformation theory and uses the Rayleigh-Ritz method and Navier double series method for analysis, verifying the rationality and effectiveness of the theoretical calculation model. The study also discusses the influence of different parameters on the dynamic characteristics of the structure.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Lirong Sha, Hongfei Sun, Yajin Wang, Liming Zhou
Summary: To enhance the application potential of intelligent unit devices made from piezoelectric structures, it is crucial to investigate their kinetic properties. In this study, an electromechanical coupling enriched finite element method (FEM) was proposed, incorporating an interpolation coverage function of node displacement into the displacement and potential shape functions. The motion equations were derived and validated through the analysis of free vibration and transient response of piezoelectric structures, demonstrating promising prospects for analyzing their dynamic properties.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Mechanical
Liang Wang, Pengpeng Yu, Shiyu Zhang, Zhenhua Zhao, Jiamei Jin
Summary: In this study, an electromechanical step-reduction method for piezoelectric composite beams (VPCBs) is proposed to address the limitation of traditional methods in transferring electrical information and depicting electromechanical coupling behaviors. The effectiveness and applicability of the proposed method are demonstrated through experimental verification and calculation results.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Mechanics
Israr Ud Din, Naziha Aslam, Yacob Medhin, M. S. Sikandar Bathusha, Muhammad S. Irfan, Rehan Umer, Kamran A. Khan
Summary: This study presents a unique design of self-sensing sandwich structure with excellent piezoresistive response, which can be used for real-time monitoring of the health status of aerospace structures. Through testing and model fitting, it was found that the piezoresistivity of the sandwich structure is related to the geometrical parameters and the position of the sensor.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Maria Infantes, Philippe Vidal, Rafael Castro-Triguero, Laurent Gallimard, Olivier Polit
Summary: This paper introduces a new strategy for solving the forced vibration problem of bi-dimensional piezoelectric composite beams, utilizing an iterative algorithm to solve three one-dimensional linear problems at each iteration, resulting in a 2D solution with low computational complexity. The effectiveness of the method is validated through numerical tests and boundary condition studies, comparing the results with exact elasticity solution and finite element simulations.
COMPOSITE STRUCTURES
(2021)
Article
Materials Science, Composites
A. N. Shankar, S. M. Murali Krishna, Rohinikumar Chebolu, Ajay K. S. Singholi, Rasmeet Singh, S. Rajeshkumar
Summary: This study investigates the dynamic responses of carbon nanotubes (CNT) reinforced composite sandwich shells with multi magnetorheological elastomer (MRE) core, showing a significant influence on the natural frequencies. The study also analyzes the effects of several parameters on the natural frequencies, including the content of CNT, magnetic fields, and support conditions.
POLYMER COMPOSITES
(2022)
Article
Materials Science, Multidisciplinary
Xiaoqing Sun, Jinwei Qiao, Gaofeng Wei, Hui Zhang
Summary: An innovative 3D braiding piezoelectric composite actuator (3D-BPCA) is proposed and compared with traditional piezoelectric ceramics actuator (PZT-5A). The theoretical analysis and numerical simulation show that the 3D-BPCA has better actuating properties and wider application prospects.
RESULTS IN PHYSICS
(2021)
Article
Engineering, Civil
Ankita Gupta, S. Pradyumna
Summary: In this study, the nonlinear free and forced vibration analyses of variable stiffness composite laminated (VSCL) and sandwich shell panels with curvilinear fibers were conducted using a higher-order theory. The structural model considered a third-order shear deformation theory, and geometric nonlinearity was included through von Karman nonlinear strain-displacement relations. The results were compared with existing exact and analytical solutions to validate the model.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Aerospace
Dimitris Varelis, Dimitris A. Saravanos
Summary: This paper investigates the nonlinear electromechanical response of shallow piezoelectric laminated shells under mechanical pressure loads, predicting the transition between stable and unstable states using a coupled nonlinear mechanics model. The results demonstrate the predictive capability and complexity of the electromechanical behavior of the shells.
AEROSPACE SCIENCE AND TECHNOLOGY
(2021)
Article
Energy & Fuels
Chenlin Li, Xiaogeng Tian, Tianhu He
Summary: This article investigates the size-dependent dynamic thermo-electromechanical response of piezoelectric laminated sandwich smart nanocomposites using a semi-analytical technique via the Laplace transformation. The results show that by properly selecting thermal/elastic nonlocal parameters or material constants ratios, electrical energy harvesting and heat isolation can be maximally improved, while harmful thermal stresses will be lowered to some extent. This work provides a comprehensive understanding on the response of such composites in non-uniform thermal environments and offers guidelines for thermal management and piezoelectric energy harvesting.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Van-Cuong Nguyen, Minh-Quyen Le, Amaury Fimbel, Sophie Bernadet, Yoann Hebrard, Jean-Francois Mogniotte, Jean -Fabien Capsal, Pierre -Jean Cottinet
Summary: This paper reports on a novel technique of bearing load monitoring using smart sensor coating. Screen printing is used to deposit multilayered thin films on the outer bearing or a flat steel substrate, and a new design is proposed to enhance the sensitivity. The proposed approach shows higher sensitivity and easier integration compared to classical piezoresistive technology.
MATERIALS & DESIGN
(2022)
Article
Mechanics
Rosalin Sahoo, Bhrigu Nath Singh
Summary: The present study assesses a newly developed non-polynomial zigzag theory for the buckling analysis of laminated composite and sandwich plates. Results show that the theory is not only accurate but also efficient in predicting buckling responses of such structures.
ARCHIVE OF APPLIED MECHANICS
(2021)
Article
Materials Science, Composites
Ananda Babu Arumugam, Rajeshkumar Selvaraj, Mageshwaran Subramani, Ramesh Babu Vemuluri
Summary: In this study, the vibration and instability characteristics of rotating carbon nanotube reinforced magnetorheological elastomer embedded sandwich composite plates were investigated using finite element method. The efficacy of the method was verified by comparing the natural frequencies assessed using experimental studies. The research findings show that the CNT reinforcement significantly improves the stiffness and damping of the composite plates and reduces the instability regions.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Santosh Kapuria, Bhabagrahi Natha Sharma, A. Arockiarajan
Summary: An analytical model is developed for the generation and sensing of Lamb waves in thin isotropic plates with surface-bonded piezoelectric wafer transducers, incorporating shear-lag and inertia effects. The model is validated by comparing it with experimental data and numerical simulations, showing its effectiveness in understanding Lamb wave behavior and sensor interaction.
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
(2022)
Article
Mechanics
Mayank Jain, Santosh Kapuria
Summary: This paper introduces a computationally efficient spectral finite element method based on Levinson-Bickford-Reddy's theory to predict guided wave propagation in beam and panel structures. The developed method shows superior accuracy and efficiency compared to conventional counterparts and other available one-dimensional spectral elements. The relative performance of full integration and under-integration of mass matrices is also evaluated.
Article
Engineering, Multidisciplinary
Ramandeep Kaur, Santosh Kapuria
Summary: This paper presents an analytical solution for the thermoelastic wave propagation in transversely isotropic thin beams subjected to a thermal shock loading. The solution is based on the Lord-Shulman generalized thermoelasticity theory and considers a general through-thickness profile of the applied thermal loading and a general convective boundary condition. The solution is derived and validated using the Euler-Bernoulli beam theory and the extended Hamilton's principle. The effects of thermal boundary conditions and the relaxation time parameter on the beam's response are illustrated.
APPLIED MATHEMATICAL MODELLING
(2022)
Article
Mechanics
Mayank Jain, Santosh Kapuria
Summary: This article presents a computationally efficient and accurate time-domain spectral finite element method for simulating ultrasonic guided wave propagation in composite structures. The method proves to be more accurate, faster converging, and efficient compared to conventional methods.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Mechanical
Sunita Mishra, Hemant Yadav, Tanusree Chakraborty, Santosh Kapuria
Summary: In this study, the rate-dependent stress-strain responses of limestone and dolomite were investigated using a split Hopkinson pressure bar device. The experiments revealed that the specimen dimension did not significantly affect the dynamic stress-strain response, while the dynamic-to-static peak stress ratio varied between 1.8 to 8.1. The Hoek Brown criteria were used to determine the rate-dependent rock mass properties, and the Johnson-Holmquist (JH-2) constitutive model was calibrated and applied for blast analysis in tunnels.
JOURNAL OF ENGINEERING MECHANICS
(2022)
Review
Green & Sustainable Science & Technology
A. Subbulakshmi, Mohit Verma, M. Keerthana, Saptarshi Sasmal, P. Harikrishna, Santosh Kapuria
Summary: This study summarizes the research progress and methods in the dynamic analysis of floating offshore wind turbine (FOWT), including coupled and uncoupled analysis methods, as well as the integrated application of experimental and numerical methods.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Acoustics
M. Kannusamy, Santosh Kapuria, Saptarshi Sasmal
Summary: This study proposes a modified virtual time-reversal (VTR) algorithm for baseline signal-free damage detection in plate-like structures. The algorithm uses broadband Gaussian excitation instead of conventional narrowband modulated tone burst excitations for the physical actuation and sensing of Lamb waves. This modified VTR algorithm eliminates numerical errors and improves efficiency by probing at multiple frequencies using a single measurement.
Article
Thermodynamics
Amit Kumar, Santosh Kapuria
Summary: In this article, the numerical properties of the local harmonic basis function enriched finite element (FE) for wave propagation problems are studied. The effect of the enrichment harmonics on system matrix conditioning and the influence of diagonal scaling mass lumping technique on possible ill-conditioning and solution accuracy are investigated. A wave packet enriched thermoelectromechanical FE formulation is presented for axisymmetric and planar wave propagation problems in piezoelastic media. The proposed method shows significant improvement in computational efficiency and accuracy for problems involving sharp discontinuities in the fields at the wavefronts.
JOURNAL OF THERMAL STRESSES
(2023)
Article
Multidisciplinary Sciences
Suraj Kumar Rout, Santosh Kapuria
Summary: Flexoelectric materials have been extensively studied for various applications including sensing, actuation, energy harvesting, and structural health monitoring. However, there is currently no analytical model available to predict the stress transfer between a flexoelectric transducer and the host structure, particularly considering bonding compliance. In this article, the authors present an analytical model that considers shear-lag and peel stress effects to predict the interfacial stresses and deformations of flexoelectric patch actuators bonded to an isotropic host plate. The model can account for both piezoelectric and flexoelectric effects and has been validated through numerical studies and comparisons with existing results. Size effects of the actuators at the micro-scale are also discussed.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2023)
Article
Engineering, Multidisciplinary
Bhabagrahi Natha Sharma, Santosh Kapuria, A. Arockiarajan, M. Kannusamy
Summary: This study compares the conventional TRM method and the recently proposed RTRM method for baseline-free detection and sizing of damage under varying temperatures. The results show that the conventional TRM method is not suitable for damage detection and sizing under temperature variations, while the RTRM method is effective and sensitive to damage at different temperatures.
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
(2023)
Article
Mathematics, Applied
Sascha Eisentraeger, Santosh Kapuria, Mayank Jain, Junqi Zhang
Summary: This paper evaluates the numerical properties of a high-order spectral Euler-Bernoulli beam element (SBE) with a C-1-continuous approximation of the displacement field. The C-1-continuous shape functions are based on an Hermitian interpolation scheme and Gauss-Lobatto-Legendre (GLL) points. The element formulation achieves a diagonal mass matrix which is attractive for high-frequency transient analyses, but at the cost of under-integration. The numerical analysis demonstrates that the SBE has good accuracy and increased efficiency in structural dynamics through the use of diagonal mass matrix.
ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK
(2023)
Article
Mechanics
Mayank Jain, Santosh Kapuria
Summary: Lamb wave-based structural health monitoring is a promising method for real-time delamination detection in laminated structures. This study presents an efficient layerwise zigzag theory-based spectral element method for wave propagation analysis in composite beam-and panel-type structures with delamination. The proposed model shows superior efficiency, accuracy, and convergence compared to other models, and has potential applications in identifying delamination locations from Lamb wave velocity fields.
COMPOSITE STRUCTURES
(2023)
Proceedings Paper
Engineering, Civil
Bhabagrahi Natha Sharma, Santosh Kapuria, A. Arockiarajan
Summary: This study examines the performance of the refined time-reversal method (RTRM) for damage detection under varying thermal environments. The results show that the best reconstruction frequency can accurately detect the size and similarity of the damage, regardless of temperature variations.
EUROPEAN WORKSHOP ON STRUCTURAL HEALTH MONITORING (EWSHM 2022), VOL 2
(2023)
Proceedings Paper
Engineering, Civil
Mayank Jain, Santosh Kapuria
Summary: This paper presents a time-domain spectral finite element method based on efficient layerwise zigzag theory for wave propagation analysis of laminate structures. The proposed method demonstrates high accuracy and computational efficiency in free vibration and Lamb wave propagation analysis, as validated through numerical studies.
EUROPEAN WORKSHOP ON STRUCTURAL HEALTH MONITORING (EWSHM 2022), VOL 3
(2023)
Article
Acoustics
Amit Kumar, Santosh Kapuria
Summary: This paper investigates the application of a local-domain wave packet enriched multiphysics finite element method for solving axisymmetric wave propagation problems in elastic and piezoelastic media. By enriching the Lagrangian interpolations with element-domain sinusoidal functions, the computational efficiency and accuracy are significantly improved.
JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME
(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)