Article
Engineering, Mechanical
Jacob Rome, Vinay K. Goyal, Dhruv N. Patel
Summary: The discontinuities in foam-core composite sandwich panels are difficult to assess due to a lack of fundamental understanding of failure processes in the foam. This study investigates the effect of core thickness mismatches on the load carrying capabilities of composite sandwich structures. The findings have important implications for the design and evaluation of large composite components in various industries.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Vinay Damodaran, Anna G. Hahm, Pavana Prabhakar
Summary: The paper proposes a novel design and fabrication strategy for producing architected structures as the core in composite sandwich structures, which can dissipate energy and exhibit structural recovery. The mechanical response and design parameters relationship of conical unit cells are investigated, showing that the structures with curved sidewalls can dissipate energy and recover from deformation. The study demonstrates that the buckling strength and post-buckling stability of these structures are influenced by geometric parameters, providing insights for their applications in engineering materials.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Characterization & Testing
Tugberk Onal, Semsettin Temiz
Summary: The mechanical properties of bio-core sandwich composite structures with different configurations were studied both experimentally and numerically. Different thicknesses of balsa wood were used for the core, while glass fiber/epoxy composites with various fiber orientations were used for the surfaces. The effects of fiber arrangement, number of layers, and core thickness on the flexural damage load were investigated through a three-point bending test, and the damaged specimens were analyzed.
Review
Materials Science, Multidisciplinary
Joel Galos, Raj Das, Michael P. Sutcliffe, Adrian P. Mouritz
Summary: This paper reviews the research on the applications, manufacturing, properties, and performance of sandwich structures with balsa wood cores. Balsa wood offers advantages such as environmental sustainability, low cost, excellent mechanical properties, and thermal insulation. However, challenges including global supply chain issues and limitations in processing techniques, as well as impact, blast, fire, and water durability, need to be addressed. The paper also discusses future research directions for balsa structural sandwich materials.
MATERIALS & DESIGN
(2022)
Article
Engineering, Marine
Geng Xu, Kai Qin, Renjun Yan, Qin Dong
Summary: This paper presents an experimental and numerical investigation on the failure behavior and ultimate strength of fiber-reinforced sandwich composite structures. A progressive damage method is established in the numerical simulation to simulate the strength and failure behavior of sandwich L-joints, and different failure criteria are used to handle various failure modes. The numerical predictions show good agreement with the experimental results.
INTERNATIONAL JOURNAL OF NAVAL ARCHITECTURE AND OCEAN ENGINEERING
(2022)
Article
Engineering, Civil
J. Mei, P. J. Tan, F. Bosi, T. Zhang, J. Y. Liu, B. Wang, W. Huang
Summary: A hot-press molding technique was utilized to design and manufacture carbon fiber reinforced polymer X-core sandwich panels, which showed good compressive properties and potential lightweighting applications through compression tests and analytical models. Predictions from analytical and numerical models were in good agreement with experiments, indicating the effectiveness of the developed sandwich panels.
THIN-WALLED STRUCTURES
(2021)
Article
Materials Science, Composites
Guangguang Zhang, Hangyan Wang, Qinghua Liu, Zhenfei Liu
Summary: In this study, a finite element model of composite corrugated sandwich structures was established using HyperMesh and LS-DYNA software and a progressive damage model was introduced. The impact resistance of the structures was studied by analyzing the projectile's residual velocity, the impact force on the target plate, and the failure mode. The results showed that the composite front panel/metal aluminium core/metal aluminium back panel sandwich structure exhibited better impact resistance than the all-metal aluminium corrugated sandwich structures, providing valuable reference for the design of novel lightweight multifunctional structures.
JOURNAL OF COMPOSITE MATERIALS
(2023)
Article
Engineering, Multidisciplinary
Yuansong Wang, Senlin Yang, Quantian Luo, Qing Li, Guangyong Sun
Summary: A systematic approach combining acoustic emission, three-dimensional optical scanning, and X-ray computed tomography techniques is proposed to assess damage in sandwich structures subjected to low-velocity impact. The results show that the acoustic emission signals, cumulative counts, and cumulative energy are correlated with the mechanical responses of the sandwich panel, providing valuable information for online damage monitoring. X-ray computed tomography images precisely visualize the fracture behaviors of the foam-core inside the sandwich panel.
COMPOSITES PART B-ENGINEERING
(2023)
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
Engineering, Multidisciplinary
Boyue Chen, Yu Jia, Fumio Narita, Congsi Wang, Yu Shi
Summary: This paper developed a multifunctional composite sandwich structure with optimised design, and evaluated its mechanical and energy harvesting performance. The results showed that the sandwich with re-entrant honeycomb core exhibited superior mechanical performance and approximately 20% higher RMS voltage output in energy harvesting compared to sandwiches with conventional honeycomb and chiral structure cores.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Mechanics
Pengcheng Xue, Xingyu Wei, Zhibin Li, Jian Xiong
Summary: In this study, the mode I face-core interfacial debonding of an all-composite sandwich beam with CFRP hexagonal honeycomb core was characterized and studied through a combination of theoretical modeling and experimental testing. The results validated the effectiveness of the theoretical model and revealed the crack initiation and propagation mechanisms during the debonding process. A parametric study was conducted to evaluate the influence of various factors on the mechanical performance.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Engineering, Mechanical
Vinay Goyal, Jacob Rome, Dhruv N. Patel
Summary: An experimental and analytical study was conducted to understand the tensile failure mechanisms in asymmetrical tapered sandwich core structures at cold temperatures. The study revealed the significant influence of cure stresses in the foam, which should not be ignored, and successfully predicted the failure initiation location.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2023)
Article
Acoustics
M. D'Ottavio, A. Krasnobrizha, E. Valot, O. Polit, R. Vescovini, L. Dozio
Summary: This work focuses on the free and forced vibrations of sandwich beams and plates with arbitrary number of damping cores. It uses a fractional derivatives Zener-type model for frequency-dependent viscoelastic behavior, and finds approximate solutions using a computationally efficient Ritz method. Modal loss factors and damped eigenfrequencies are obtained, and different modeling and solution strategies are compared.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Engineering, Civil
Hariharan Elangovan, Vasudevan Rajamohan
Summary: The dynamic performance of tapered composite sandwich plates with various configurations of a honeycomb core material are investigated through numerical and experimental studies. The addition of strip reinforcements in the honeycomb patterns is found to enhance the stiffness and damping characteristics of the structures. Furthermore, parameters such as the taper angle of face sheets and aspect ratio of sandwich plates also influence the free vibration characteristics.
THIN-WALLED STRUCTURES
(2022)
Article
Mechanics
Ehsan Ahmadi, Amir Atrian, Javad Jafari Fesharaki, Hamid Montazerolghaem, Saeid Saberi
Summary: This study investigates the high-velocity impact behavior of new designed sandwich structures using experimental and numerical methods. A numerical model with high accuracy is developed to predict the mechanical properties of the materials and assess the impact behavior. The experimental validation confirms the effectiveness and accuracy of the numerical model.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2021)