Article
Mechanics
Mae Oiwa, Toshio Ogasawara, Hajime Yoshinaga, Tsuyoshi Oguri, Takahira Aoki
Summary: This study aimed to establish a bending strength prediction method for a thin CFRP face sheet/Nomex honeycomb sandwich panel, with successful results using both detailed core model and solid core model. The results indicated that the solid core model is more suitable for estimating the bending strength of this sandwich panel.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
K. Naresh, W. J. Cantwell, K. A. Khan, R. Umer
Summary: This study investigates the possibility of triggering ductile modes of failure in a high-performance sandwich structure by employing a multi-core design with dispersed composite plies. Results show superior mechanical properties were obtained in the shorter span length samples through experimental and theoretical approaches.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Mechanical
Joel Galos, Claes Fredriksson, Raj Das
Summary: This paper investigates the mechanical properties of lithium-ion polymer batteries and their use in automotive design. Experimentally determined shear, flexural, and compression properties of LiPo batteries were applied to analytical models of sandwich panels, discussing the trade-off between mechanical performance and cost in automotive panel design. The practicality of using sandwich composites with LiPo battery cores in automotive applications was also discussed.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2021)
Article
Materials Science, Composites
M. Rangapuram, S. K. Dasari, J. W. Newkirk, K. Chandrashekhara, H. Misak, P. R. Toivonen, D. Klenosky, T. Unruh, J. Sam
Summary: Traditional honeycomb core materials cannot meet different design requirements, but the additive manufacturing technology allows for the alteration of honeycomb core geometries. In this study, a modified aluminum honeycomb core was used as the core material in sandwich panels, and its performance was evaluated through three-point bend, edgewise compression, and impact tests, compared to a conventional honeycomb core sandwich panel. The results showed that the modified honeycomb core improved the shear strength, displacement at failure, edgewise compressive strength, peak force, and energy-absorbing capacity of the sandwich structure by certain percentages.
POLYMER COMPOSITES
(2023)
Article
Engineering, Mechanical
Fawad Tariq, Muhammad Uzair, Madni Shifa
Summary: The study found that the compressive strength of aluminum honeycomb sandwich panels is not sensitive to impact damages with diameters less than 5 mm, but significantly impaired by larger dents. Multiple dents of 10 mm resulted in a moderate reduction in strength, while a 30% reduction was observed in samples impacted by a 15 mm indenter. The aluminum facesheet bore the maximum load in failed samples, with the honeycomb core contributing insignificantly to the overall strength.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Cetin Karakaya, Secil Eksi
Summary: This study investigates the bending behaviors of honeycomb sandwich panels through simulated three-point bending tests. The panels used in the study consist of aluminium alloy skins and cast polyamide honeycomb core. The collapse mechanism and effects of structural parameters, such as foil thickness, core height, and cell length, are analyzed. The results show that increasing foil thickness and core height can enhance the load-carrying capacity of the sandwich panel, while increasing cell edge length leads to a decrease in the maximum load value. The analysis of variance results indicate that the core height is the most influential parameter on the bending behavior of the honeycomb panel (34%), followed by foil thickness (30.5%), with the cell edge having a lower influence (27.2%).
EMERGING MATERIALS RESEARCH
(2022)
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
Mechanics
Ahmed H. Abdulaziz, Mohammed Hedaya, Adel Elsabbagh, Karen Holford, John McCrory
Summary: This paper investigates the propagation of acoustic emission waves in a glass fibre aluminium honeycomb sandwich panel, quantifying the through-thickness propagation of AE from one surface to the other. The results show that AE propagating in an HSP becomes bound in the outer plates due to complex interactions with the structural elements, providing insight into attenuation rates and characteristics for practical applications.
COMPOSITE STRUCTURES
(2021)
Article
Mathematics
Geman Shi, Xiaoxun Wu, Renjie Jiang, Shande Li
Summary: The sound insulation capacity of traditional sound insulation boards is limited by mass, conflicting with the demand for light weight. To address this issue, a lightweight particle reinforced gradient honeycomb sandwich panel is proposed for lightweight sound insulation. The sound insulation is calculated based on the transfer matrix method and verified through finite element simulation. It is found that adding reinforcement particles to the aluminum matrix can significantly improve the sound insulation of the honeycomb sandwich panel, and the sound insulation also increases with the particle mass fraction of the reinforcement. Furthermore, the sound insulation performance of the sandwich plate at low frequencies is effectively improved.
Article
Materials Science, Textiles
Lihong Xu, Can Ni, Gang Liu, Junli Li
Summary: Sandwich structure is widely used in aviation field for their excellent mechanical properties. This study investigates the influence of double cell wall on the compressive properties of sandwich structure and analyzes the failure process from micro perspective. Finite element models are established in ABAQUS and verified by experiments. The results show that the failure mode of sandwich structure is different from that of aluminum honeycomb alone, and the double cell wall experiences both compressive and tensile stresses.
FIBERS AND POLYMERS
(2023)
Article
Materials Science, Composites
Zhikang Liu, Jingxi Liu, Mangong Zhang, Jiayi Liu, Wei Huang
Summary: This article investigates the bending behaviors of composite re-entrant honeycomb structures under three-point bending load. The influence of wall thickness gradient design on bending failure modes and the effect of relative density on bending failure load were analyzed.
POLYMER COMPOSITES
(2023)
Article
Mechanics
Jiu-Tao Hang, Wei Zhao, Lei Liu, Guang-Kui Xu
Summary: In this study, the damage sensitivity of a composite honeycomb sandwich structure with face-core de-bonding defects or impact damage was evaluated through in-plane compression, 4-point bending experiments, and FEM simulations. It was found that the structure is more sensitive to impact damage than to de-bonding defects. Impact damage with an energy range of 3 J-5.5 J can significantly change the failure mode and reduce the strength of the structure, while de-bonding defects of the same size only cause a minor decrease in strength. The developed FEM model accurately predicts the failure modes and residual strengths observed in experiments, indicating that the structural characteristics during impact loading are the main contributors to structural failure. Our model provides a useful tool for studying the mechanical behaviors of honeycomb sandwich structures.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
Junzhen Chen, Xuming Yao, Long Cheng, Guoyu Yang, Jialiang Li, Shaozhe Wang, Jianjun Jiang
Summary: This paper investigates the effects of three toughening interfaces on the bending performance of CFRP/honeycomb sandwiches, as well as the impact of the toughening interfaces on the peak force and energy absorption. The results show that adding a multi-scale toughening film (short aramid fiber film grafted with polydopamine and graphene oxide) at the interface increases the peak force and energy absorption of the sandwich by 43.6% and 141.3% respectively. The toughening interface changes the competition mechanism between the facesheet, interface, and honeycomb, influencing the deformation process and failure mode of the sandwich.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Civil
Ruohuan He, Caiqi Zhao, Wang Gang, Zhijie Zhang, Fan Li
Summary: In this study, the aluminum alloy honeycomb panels were investigated and a quantitative analysis was conducted. Three different configurations of honeycomb panels were fabricated. The results showed that the performance of the Type 3 panel was better than the Type 1 panel, with an increased maximum bearing capacity of 34.7 kN. The numerical model established in this study was validated with a low average error of 3.366%. Overall, this study provides a theoretical basis for the application of aluminum alloy honeycomb panels in engineering.
Article
Engineering, Mechanical
Yongqiang Li, Wenkai Yao, Yingjie Zhang
Summary: This study investigates the nonlinear dynamics of symmetric rectangular honeycomb sandwich thin panel using theoretical derivations and numerical analysis. It is found that the width-to-length ratio and thickness-to-length ratio have a significant influence on the nonlinear frequency ratio of the panel.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2021)
Article
Engineering, Mechanical
M. Phani Surya Kiran, I. Balasundar, K. Gopinath, T. Raghu
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2019)
Article
Nanoscience & Nanotechnology
K. Sahithya, I. Balasundar, Prita Pant, T. Raghu, Hillol Kumar Nandi, Vajinder Singh, P. Ghosal, M. Ramakrishna
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Metallurgy & Metallurgical Engineering
A. Venkata Ramana, I. Balasundar, M. J. Davidson, R. Balamuralikrishnan, T. Raghu
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
(2019)
Article
Materials Science, Multidisciplinary
Jayakrishnan Nampoothiri, I Balasundar, T. Raghu, K. R. Ravi
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2020)
Article
Chemistry, Physical
K. Sahithya, I. Balasundar, Prita Pant, T. Raghu
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Chemistry, Physical
K. Sahithya, I Balasundar, Prita Pant, T. Raghu
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Metallurgy & Metallurgical Engineering
Litton Bhandari, Jalaj Kumar, I. Balasundar, Amit Arora
Summary: The effect of heat treatment on the microstructure and high-cycle fatigue behavior of near-alpha titanium alloy IMI 834 used in aero-engine components has been studied. Significant impact of quench media on high-cycle fatigue life was observed. A fatigue model for the alloy was developed through fractographic investigations and a generalized stress-life model derived from fatigue data.
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
(2021)
Article
Nanoscience & Nanotechnology
T. Mahender, M. R. Anantha Padmanaban, I. Balasundar, T. Raghu
Summary: The microstructural features of titanium alloys are influenced by post deformation heat treatment parameters, which in turn affect the mechanical properties. This study evaluated the effects of solution treatment temperature and cooling rate on the microstructure and room temperature tensile properties of an α/β titanium alloy, and attempted to establish the correlation between heat treatment parameters and resulting tensile properties using response surface methodology.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
A. Verma, H. Natu, I Balasundar, Arout Chelvane, V. L. Niranjani, M. Mohape, G. Mahanta, S. Gowtam, T. Shanmugasundaram
Summary: In this study, laser welding of CoCrFeNi and CoCrCuFeNi alloys was conducted. It was found that the addition of Cu resulted in changes in the microstructure and mechanical properties of the alloys. The fusion zone of both the welds exhibited coarser grains and lower hardness compared to the base metals.
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING
(2022)
Article
Materials Science, Multidisciplinary
T. Mahender, I Balasundar, A. V. S. S. K. S. Gupta, T. Raghu
Summary: Isothermal hot compression tests were conducted on Al 2014 + 2 wt% TiB2 composite to establish the constitutive relationship using different metamodels. The results showed that the 3-15-1 neural network architecture provided a better correlation.
ADVANCES IN MATERIALS AND PROCESSING TECHNOLOGIES
(2022)
Article
Engineering, Manufacturing
T. Mahender, I. Balasundar, A. V. S. S. K. S. Gupta, T. Raghu
Summary: Isothermal hot compression tests were conducted on Al 2014 alloy to investigate the effects of deformation temperature (300-500°C) and strain rate (0.0003-1 s(-1)). Three commonly used meta-models, namely genetic algorithm (GA), response surface methodology (RSM), and artificial neural network (ANN), were employed to develop constitutive models using the flow stress data obtained from the experiments. Evaluation of the meta-models' prediction accuracy was carried out using standard statistical parameters such as correlation coefficient (R) and average absolute relative error (AARE). RSM and ANN performed better than GA, especially at high temperature and strain rates. RSM suggested a quartic regression equation, while a 3-15-1 neural network architecture provided a better correlation. The reliability of the meta-models was verified by implementing the established meta-model constitutive equations in a commercial finite element analysis software and comparing the results.
INTERNATIONAL JOURNAL OF INTERACTIVE DESIGN AND MANUFACTURING - IJIDEM
(2023)
Article
Engineering, Mechanical
T. Mahender, I. Balasundar, T. Raghu
Summary: In this study, the effect of six important design parameters on the thermal performance and density of nickel alloy C263 sandwich panels was evaluated using the Taguchi-based design of experiments approach. The results were analyzed using statistical analysis techniques to determine the optimal combination of design parameters and their influence on the performance of the sandwich panels. An algebraic model was used to identify the optimum combination of design parameters that provides the best thermal performance with the lowest density. The results are presented and discussed in this paper.
AUSTRALIAN JOURNAL OF MECHANICAL ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
I Balasundar, T. Raghu, B. P. Kashyap
MATERIALS PERFORMANCE AND CHARACTERIZATION
(2019)
Proceedings Paper
Engineering, Mechanical
Amit Singh, I. Balasundar, J. P. Gautam, T. Raghu
2ND INTERNATIONAL CONFERENCE ON STRUCTURAL INTEGRITY AND EXHIBITION 2018 (SICE 2018)
(2019)