Article
Materials Science, Ceramics
Shigang Ai, Yanfei Chen, Rujie He
Summary: This study investigated the mechanical performances of a novel stitched sandwich panel structure, with experiments showing that stitching parameters significantly impact its properties. The study found that perforation and stitching are effective approaches to enhancing the structural performance.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Textiles
Zeynab Behroozi, Hooshang Nosraty, Majid Tehrani
Summary: The study found that a 45-degree stitching angle exhibited the best performance in resisting ballistic impact, with significantly higher energy absorption compared to other stitching angles. Stitching also helps reduce damage area in both front and back sides of the composites as well as inhibiting delamination.
JOURNAL OF INDUSTRIAL TEXTILES
(2022)
Article
Engineering, Mechanical
Jiajia Guo, Yong Xiao, Heng Ren, Huimin Chen, Dianlong Yu, Jihong Wen
Summary: Lattice truss-core sandwich plates have gained attention for their mechanical properties and multifunctionality, but their lightweight feature hampers low-frequency sound insulation. To address this, a perforated faceplate is introduced to utilize the sandwich core as an acoustic cavity, creating a double-panel metastructure with a homogeneous plate. A semi-analytical method combining effective medium theory and dynamic homogenization is developed for efficient sound transmission loss (STL) prediction. Numerical and experimental results demonstrate that the double-panel metastructure exhibits remarkable sound insulation performance within a broadband low-frequency range.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Construction & Building Technology
Sensen Li, Hualin Fan
Summary: By filling Expanded Polystyrene (EPS) foamed concrete, pultruded sandwich panels (PSPs) become stiffer and stronger, changing the failure mode and significantly improving the flexural load capacity. Theoretical analyses predict the performance of foam-filled PSPs, while factors affecting their failure pattern and flexural load capacity are discussed.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2021)
Article
Engineering, Civil
Sensen Li, Bei Zhang, Dapeng Yang, He Wang, Yang Liu, Huguang He, Hualin Fan
Summary: Filling expanded polystyrene (EPS) mortar can effectively improve the mechanical properties of pultruded sandwich panel (PSP), leading to higher ultimate bearing capacity and increased equivalent shear modulus. As the density of EPS mortar increases, the failure mode of EPS mortar-filled PSP changes accordingly.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2021)
Article
Engineering, Civil
Hui Li, Dongming Liu, Bocheng Dong, Kaihua Sun, Jing Zhao, Qingshan Wang, Wei Sun, Xiangping Wang
Summary: The vibration suppression performance of composite pyramidal truss sandwich cylindrical shell panels with damping coating (DC) is investigated in this study. A novel theoretical model is developed based on the first-order shear deformation theory, artificial spring technique, Rayleigh-Ritz variational approach, and Duhamel integral method. Vibration tests are conducted to validate the model, and a parametric study is performed to analyze the influence of key material and geometric parameters on vibration properties. The results provide important insights for enhancing the vibration suppression capabilities of the DC-CPTSCS panels.
THIN-WALLED STRUCTURES
(2022)
Article
Mechanics
Chengyu Guan, Huimin Li, Zhiyong Yang, Yuyang Zhang, Daining Fang
Summary: This paper proposes a new method for fabricating carbon fiber reinforced polymer (CFRP) orthogonal lattice truss sandwich panels by inserting inner trusses into outer trusses. Three different adhesives, epoxy resin, ethylene-vinyl acetate copolymer (EVA), and nitrile butadiene rubber (NBR), are used to prepare the structures. The finite element modal strain energy method is employed to test and predict the mode shapes, natural frequencies, and loss factors of the structures. The results show that the EVA adhesive improves the loss factors of the structure while maintaining an acceptable reduction of the natural frequency.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Mechanical
G. Newaz, G. S. Dhaliwal, A. Phadatare, M. Hailat
Summary: This study evaluates the effect of padding on sandwich composite materials by comparing flexural tests of beams with and without padding. The results show that although padding does not affect flexural stiffness and peak load, it significantly changes failure modes, with more core collapse in the padded case. Finite element analysis indicates that the presence of padding leads to higher von Mises stresses in the core material, increasing the likelihood of core failure. This research highlights the importance of considering the impact of padding on failure modes and load-deflection response in sandwich composites under flexural loading.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2021)
Article
Engineering, Mechanical
Huseyin E. Yalkin, Ramazan Karakuzu, Tuba Alpyddiz
Summary: This study investigates the impact behavior of foam core sandwich composite with different structural configurations. It is found that core stitching can be an alternative to facesheet stitching in terms of absorbed energy, and modifying the thickness can significantly reduce core/facesheet debonding area.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(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
Mechanics
Guangtao Wei, Cong Zhang, Linzhi Wu
Summary: This study investigated the general nonlinear static and dynamic formulations of sandwich panels with compressible cores under large deformation using the Extended High-order Sandwich Panel Theory, and obtained solutions for static and dynamic mechanical responses through numerical techniques.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Changze Sun, Hamda Albustani, Vaibhav A. Phadnis, Mohamed Nasr Saleh, Wesley J. Cantwell, Zhongwei Guan
Summary: This study improves the structural integrity of foam-core sandwich structures by embedding carbon-fiber/epoxy stitched reinforcements. Experimental results show that the stitched samples have higher stiffness and strength compared to the non-stitched samples under different loading conditions. Furthermore, the external and internal damage as well as failure mechanisms of the stitched samples are evaluated using DIC, X-ray CT, and fractography analysis.
COMPOSITE STRUCTURES
(2023)
Article
Physics, Multidisciplinary
Huseyin Erdem Yalkin, Ramazan Karakuzu, Tuba Alpyildiz
Summary: This study numerically investigates the low-velocity impact properties of sandwich composites with E-glass fiber/epoxy and PVC foam core, and compares the results with experimental data. The numerical simulations show good agreement with the experimental results.
Article
Mechanics
Xinye Cao, Bin Ji, Yiling Lin, Hualin Fan
Summary: This paper presents the design, fabrication, testing, and analysis of a large-scale additively manufactured (AM) metal matrix composite (MMC) lattice truss sandwich cylinder (LTSC). An elastoplastic multi-failure analyzing method is proposed to predict the failure load and pattern of the LTSC. The results provide insights into the practical application of large-scale AM LTSCs in aerospace engineering compared to widely studied carbon fiber reinforced composite LTSCs.
COMPOSITE STRUCTURES
(2023)
Article
Materials Science, Composites
Milad Ziaie, Farshad Zamani, Saina Homayouni, Himan Khaledi, Alireza Qareqani, Mehrad Ziaie
Summary: In this study, the mechanical properties of GFRP composite sandwich structures with polyurethane foam-filled M-shaped core were determined through numerical and experimental testing. The results showed good agreement between experimental and finite element analysis data, validating the use of finite element analysis to predict the mechanical properties of these sandwich panels.
POLYMER COMPOSITES
(2023)
