Article
Engineering, Mechanical
Zhenhua Song, Sean Luong, Daniel Whisler, Hyonny Kim
Summary: The study investigates the effects of multi-angle impacts of ice spheres at various velocities on a sandwich panel, revealing different failure modes for honeycomb core materials and the impact of angles on pressure distribution on the face sheet of the panel. The findings show that impact angles affect the distribution of ice scatter fragments, influencing pressure distribution on the panel during impact.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2021)
Article
Engineering, Civil
Zhou Jian, Minglong Xu, Zhijia Zhang, Tian Zheng
Summary: This work investigates the vibration and aeroelastic stability behavior of honeycomb core sandwich panels with four-side simply supported boundaries in supersonic airflow. The results show that the hexagonal honeycomb core can improve the natural frequencies of the panel. The honeycomb core thickness has a major influence on the critical dynamic pressure of the honeycomb sandwich panel, and the cell thickness, the cell angle and internal aspect ratio have no significant effect on the critical dynamic pressure. Compared with the basic isotropic panel, the mass can be reduced by nearly 70% using the honeycomb panel in the condition of the same critical dynamic pressure, which is of great significance to reduce the weight of the aircraft panel.
THIN-WALLED STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Nikhil Ghate, Manmohan Dass Goel
Summary: In recent years, the aluminium honeycomb core sandwich panel has gained attention as a blast mitigation solution due to its high energy absorbing capacity. This study investigates the load mitigation behavior of sandwich panels with different honeycomb core topologies under blast loading. The results show that a multi-layered core and intermediate sheets strengthen the sandwich panel and make it significantly stronger under blast loading compared to a single layer sandwich panel. The role of intermediate sheets in energy dissipation is found to be insignificant in the multi-layered sandwich panel under the considered parameters. Furthermore, the difference in energy dissipated by the front face sheet and back face sheet increases with an increase in the number of layers of cores.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Engineering, Mechanical
Lei Zhang, Weitao Zhang, Fengxian Xin
Summary: This study proposes a hexagonal honeycomb sandwich panel with rough embedded necks as a new structure for broadband low-frequency sound absorption. A theoretical model and a finite element model are established to study the sound absorption performance and mechanism of the structure. The results show that the structure has excellent broadband low-frequency sound absorption performance, with energy dissipation mainly occurring in the neck. Adjusting the relative roughness of the neck enhances the energy dissipation and shifts the peak frequency towards low frequencies.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Engineering, Mechanical
Wei He, Xiangjun Peng, Fengxian Xin, Tian Jian Lu
Summary: This study investigates the superior sound absorption performance of ultralight micro-perforated sandwich panels with double-layer hierarchical honeycomb core. Theoretical model predictions and numerical simulations validate the physical mechanisms underlying sound absorption, with systematic parametric study revealing optimal structural parameters for maximizing sound absorption. Viscous dissipation of air inside micro-perforations and around inlet/outlet regions is shown to dominate sound absorption, while the proposed hierarchical construction offers improved load-bearing capacity and significantly enhanced sound absorption across a wide frequency range compared to panels with regular honeycomb core.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2022)
Article
Engineering, Aerospace
Reihaneh Aslebagh, Aleksandr Cherniaev
Summary: This study investigated the effects of projectile shape on the ballistic performance of aluminum honeycomb-core sandwich panels under hypervelocity impacts. Ring projectiles were found to be of the highest concern, while simulations with simple disks did not show significant changes in the panel's performance. Additionally, honeycomb cell size and projectile/honeycomb cell alignment strongly influenced damage to the rear facesheet of the panel.
JOURNAL OF AEROSPACE ENGINEERING
(2022)
Article
Acoustics
Chenhao Dong, Zhao Liu, Robert Pierce, Xiaoling Liu, Xiaosu Yi
Summary: A new micro perforated sandwich panel with honeycomb-hierarchical pore structure core is developed in this study. By combining carbonized cotton with hierarchical pore structure and a micro perforated honeycomb core, the sound-absorbing performance of the structure is enhanced without significant weight increase. Experimental results show that the average sound absorption coefficient of the structure can be improved from 0.220 to 0.558 with pure carbonized cotton filling, and further increased to 0.626 with hierarchical pore structure. Additionally, theoretical and finite element models are established with prediction errors of 16.8% and 8.6% respectively.
Article
Engineering, Mechanical
Mohammad Tauhiduzzaman, Leif A. Carlsson
Summary: The fracture mechanics analysis of a face/core interface crack in a honeycomb core sandwich under mode I-dominated loading conditions is conducted to examine the homogenized in-plane extensional properties. The study shows that plane stress assumption may lead to crack closure effects and highly distorted core elements for core with low in-plane modulus, while plane strain stabilizes the core deformation. Experimental results support the plane strain constrained modulus approach for face/core debond analysis.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2021)
Article
Mechanics
Xinyu Li, Hao Zhang, Haiyang Yang, Junrong Luo, Zhongmin Xiao, Hongshuai Lei
Summary: Due to their excellent mechanical properties and design flexibility, fluted-core composite sandwich structures have gained significant attention in aerospace and rail transit applications. This study investigated the free-vibration characteristics and optimized design of composite fluted-core sandwich cylinders through theoretical models and experimental tests.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
D. K. Korupolu, P. R. Budarapu, V. R. Vusa, M. K. Pandit, J. N. Reddy
Summary: This study investigates the performance of enhanced hierarchical honeycomb core cellular structures under compression and impact loads by proposing a hierarchical scheme of varying the order and level of the cells. The development of hierarchical patterns enhances the load-bearing capacity and introduces a novel second order second level hexagon based hybrid cell.
COMPOSITE STRUCTURES
(2022)
Article
Instruments & Instrumentation
Umer Sharif, Lin Chen, Beibei Sun, Dauda Sh Ibrahim, Orelaja Oluseyi Adewale, Noman Tariq
Summary: Sandwich beams with an aluminium face sheet and a magnetorheological elastomer (MRE) filled in a honeycomb core of Nylon and Resin8000 were manufactured and experimentally analysed in this study. The dynamic properties of the beams were evaluated by subjecting them to sine sweep and classic shock tests, both with and without the application of magnetic field. The experimental results showed that the sandwich beams exhibited good vibration level attenuation, particularly in the primary vibration mode. The induced magnetic field was capable of changing the natural frequencies, vibration amplitudes, and damping ratios of the sandwich beams with MRE honeycomb core.
SMART MATERIALS AND STRUCTURES
(2022)
Article
Engineering, Mechanical
Xiong Wu, Yinggang Li, Wei Cai, Kailing Guo, Ling Zhu
Summary: This paper investigates the dynamic responses and energy absorption characteristics of aluminium honeycomb sandwich panels (AHSPs) under ice wedge impact through numerical and experimental methods. The results show good agreement between numerical and experimental results and indicate the significant contribution of ice wedge energy dissipation to impact energy absorption.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2022)
Article
Engineering, Mechanical
Valerio Acanfora, Mauro Zarrelli, Aniello Riccio
Summary: This paper presents a numerical/experimental study on a new effective shock absorber concept achieved through Additive Manufacturing technology. The study compares different shock absorber configurations and demonstrates that sandwich structures made with polypropylene and carbon fiber reinforced polymers exhibit better overall crashworthiness performance. The numerical results are prelimary validated through experimental tests.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Computer Science, Interdisciplinary Applications
Luis Santos, Bassam A. Izzuddin, Lorenzo Macorini
Summary: This study investigates the application of steel sandwich panels as two-way deck systems and proposes a design methodology based on optimization. Near-optimal designs for steel sandwich panels are achieved considering weight reduction and failure modes. Plate bending solutions and sandwich bending solutions are compared in terms of computational efficiency and accuracy, and design limit state equations are formulated based on internal stresses. The proposed methodology is verified against detailed finite element models.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2022)
Article
Engineering, Civil
E. Mohammad-Rezaei Bidgoli, Mohammad Arefi
Summary: This paper studies the nonlinear vibration analysis of a composite sandwich with graphene nanoplatelets. The displacement field of the sandwich plate is developed based on first-order shear deformation theory and geometric nonlinearity is considered in the constitutive relations. The governing equations of motion are derived using Hamilton's principle and solved using Galerkin's approach. The nonlinear frequency and the nonlinear-to-linear frequency ratio are computed based on the input parameters of the honeycomb structure and graphene nanoplatelets.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2023)
Article
Mechanics
S. Ghuku, T. Mukhopadhyay
Summary: Lattice-based artificial materials have shown the potential of tailoring multifunctional capabilities that are not possible in traditional materials. However, the enhancement of global specific stiffness and failure strength through the conventional periodic lattices has become saturated, leading to a need for innovative design at a more elementary level. In this study, a novel concept of anti-curvature in lattice material design is proposed, which enhances elastic failure strength in the nonlinear regime without altering the relative density. A semi-analytical framework is developed to estimate failure onset in honeycomb lattices with anti-curvature effect, considering geometric nonlinearity under large deformations.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
T. Mukhopadhyay, S. Naskar, S. Dey, S. Dey
Summary: In this study, a Gaussian process-based machine learning method is proposed to achieve high accuracy in analysis results with low computational expenses. By combining higher-order thick plate theory with lower-order shear deformation theory, both accuracy and efficiency can be improved in static and dynamic analysis of composite plates and shells. The proposed method is versatile and can be further applied in other applications.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Civil
Sudip Chowdhury, Arnab Banerjee, Sondipon Adhikari
Summary: This paper studies the optimal design of inertial amplifier base isolators (IABI) for mitigating the dynamic response of multi-storey buildings under base excitations. The H-2 optimization method is used to obtain closed-form expressions for the optimal design parameters of IABI. The effectiveness of these expressions is evaluated by comparing the frequency and time domain responses of isolated structures to those of uncontrolled structures. The results show that the response reduction capacity of the optimal inertial amplifier base isolator is increased by 50% to 60% compared to traditional base isolators.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2023)
Article
Materials Science, Multidisciplinary
Diptiman Kundu, Sushanta Ghuku, Susmita Naskar, Tanmoy Mukhopadhyay
Summary: Architected lattice materials, realized through artificial micro-structuring, have attracted significant attention due to their enhanced mechanical performances. However, research on the design of artificial microstructures for mechanical property modulation is saturated, calling for innovation at a more fundamental level. A bi-level design is proposed to explore the potential of geometries and patterns at different length scales, resulting in extreme enhancement of elastic properties through the coupled interaction of beam-level and lattice-level architectures.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Mechanics
A. Garg, T. Mukhopadhyay, M. O. Belarbi, L. Li
Summary: In this study, a surrogate model based on Random Forest (RF) machine learning is used to transform solutions based on the First-order Shear Deformation Theory (FSDT) into elasticity-based solutions. The bending behavior of laminated composite plates and shells is analyzed to demonstrate the effectiveness of the surrogate-assisted computational bridging. The surrogate model predicts the difference in stress and displacement between FSDT and Elasticity solutions, which are then adjusted to obtain more accurate values.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
A. Garg, T. Mukhopadhyay, M. O. Belarbi, H. D. Chalak, A. Singh, A. M. Zenkour
Summary: Available shear deformation theories (SDTs) have their own merits and demerits. Among SDTs, first-order shear deformation theory (FSDT) and higher-order shear deformation theories (HSDT) are widely used for LCS beams analysis. However, they cannot predict the continuation of transverse shear stresses at interfaces across the thickness of the LCS beams. This study aims to transform the stress variations obtained from FSDT to 3D Elasticity solutions using Gaussian Process Regression (GPR) based surrogate model in order to predict the variation of transverse normal stresses across the thickness accurately and efficiently.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Mechanical
A. Singh, S. Naskar, P. Kumari, T. Mukhopadhyay
Summary: This paper proposes an accurate three-dimensional framework for studying the elastic and viscoelastic free vibration of in-plane functionally graded orthotropic rectangular plates integrated with piezoelectric sensory layers. The developed analytical framework considers gradation in stiffness and density of the composite layers and employs equations of motion formulated in mixed form. The numerical results are compared with published literature and 3D finite element results to validate the accuracy and efficacy of the proposed model.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Engineering, Aerospace
Pratik Tiwari, Susmita Naskar, Tanmoy Mukhopadhyay
Summary: This paper aims to improve the specific stiffness of bending-dominated lattices by introducing elementary-level programmed curvature through a multilevel hierarchical framework. The influence of curvature in the elementary beams is investigated here on the effective in-plane and out-of-plane elastic properties of lattice materials. The proposed curved composite lattice materials would enhance the specific stiffness of bending-dominated lattices to a significant extent, while maintaining their conventional multifunctional advantages.
Article
Engineering, Mechanical
Sudip Chowdhury, Arnab Banerjee, Sondipon Adhikari
Summary: This paper introduces a method of combining negative stiffness devices with inerters to traditional base isolators and tuned mass dampers. The optimal design parameters of these novel passive vibration dampers are derived using H2 and H & INFIN; optimization methods. The results show that the optimized negative stiffness inerter-based base isolators and tuned mass dampers outperform traditional base isolators and tuned mass dampers in terms of dynamic response reduction capacity.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
P. Sinha, M. G. Walker, T. Mukhopadhyay
Summary: The effective elastic moduli of lattice-based materials play a critical role in advanced mechanical and structural systems. We introduced programmed domain discontinuities in the cell walls of the lattice metamaterials to achieve non-invariant elastic moduli under different deformation modes. Furthermore, we derived an efficient analytical framework for calculating the effective elastic moduli of lattice materials considering the influence of domain discontinuity. The realization of non-invariant elastic moduli in bi-level architected lattice materials would have significant technological applications.
MECHANICS OF MATERIALS
(2023)
Article
Instruments & Instrumentation
P. Sinha, T. Mukhopadhyay
Summary: Engineered honeycomb lattice materials with high specific strength and stiffness are increasingly used for advanced multifunctional applications. However, the ability to actively modulate the mechanical properties of these materials is currently lacking, which is crucial for a range of applications in advanced structural systems.
SMART MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Aerospace
R. S. Chahar, J. Lee, T. Mukhopadhyay
Summary: This paper presents an efficient surrogate approach using support vector machines (SVM) coupled with computationally intensive finite element simulations to quantify the uncertainty in lightning strike damage. The study focuses on the probabilistic quantification of thermal damage and electrical responses in unprotected carbon/epoxy composite laminates due to stochastic variations in temperature-dependent material properties and ply orientations. The results demonstrate the significant influence of source uncertainty on epoxy matrix decomposition, electrical current density, and electric potential in the unprotected laminates.
AEROSPACE SCIENCE AND TECHNOLOGY
(2023)
Article
Automation & Control Systems
R. S. Chahar, T. Mukhopadhyay
Summary: Recently, machine learning approaches have gained attention in uncertainty quantification of composite laminates. To address the computational demanding issue, we propose a multi-fidelity ML based surrogate approach which combines high-and low-fidelity simulations. By using this approach, we can achieve computational advantage without compromising accuracy. The results show that ply orientations are the most sensitive parameters to damages in composite laminates, and the degree of uncertainty in output quantities depends on the level of input stochastic variations.
ENGINEERING APPLICATIONS OF ARTIFICIAL INTELLIGENCE
(2023)
Article
Mechanics
S. Mondal, K. B. Shingare, T. Mukhopadhyay, S. Naskar
Summary: The electromechanical responses of single and multi-layered piezoelectric functionally graded graphene-reinforced composite (FG-GRC) plates were studied, and it was found that the addition of a small weight fraction of graphene can enhance the electromechanical response of the plates.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Materials Science, Composites
T. Mukhopadhyay, S. Naskar, D. Kundu, S. Adhikari
Summary: Traditionally, lattice materials are composed of a network of beams with void space. Researchers are now exploring ways to use the void space to modulate the physical properties of lattices. In this study, analytical expressions for the effective elastic moduli of space-filled lattices were developed, based on an exact stiffness matrix approach and the unit cell method. Numerical results showed a significant increase in the effective in-plane elastic moduli with a relatively low infill stiffness.
COMPOSITES COMMUNICATIONS
(2023)
