Article
Mechanics
Mingze Ma, Weixing Yao, Wen Jiang, Wei Jin, Yan Chen, Piao Li, Jie Huang
Summary: The fatigue test of composite honeycomb sandwich panels under random vibration load was conducted in this study. The test results showed that the failure mode of the honeycomb sandwich structure under random vibration load was the same as that under constant-amplitude load. Based on the test results and the S-N curve of honeycomb sandwich panel under constant-amplitude load, a method was proposed to predict the fatigue life of composite honeycomb sandwich structures under random vibration load.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Wei Zeng, Weimin Jiang, Jiayi Liu, Wei Huang
Summary: This study fabricated a composite sandwich structure with reentrant honeycomb cores using a novel manufacturing method. The dynamic responses and failure mechanism of the structure under impulsive loading were investigated experimentally and numerically. The results showed that the sandwich structure with higher relative density exhibited better impact resistance.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Multidisciplinary
Shijun Song, Chao Xiong, Junhui Yin, Zhaoshu Yang, Chao Han, Sa Zhang
Summary: In this study, two new sandwich structures, PMI foam-reinforced CSHS (PRCSHS) and aluminum foam-reinforced CSHS (AFRCSHS), were formed by using PMI foam and aluminum foam as reinforcement materials for filling the cells of carbon fiber-reinforced composite square honeycomb sandwiches (CSHSs). The impact resistance and residual fiexural performance of the composites were compared through low-velocity impact (LVI) and three-point bending (3 PB) experiments. The PRCSHS and AFRCSHS showed significantly improved properties, including increased impact load and energy absorption, as well as enhanced residual fiexural load and energy absorption.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Polymer Science
Jianqin Wu, Jiannan Zhou, Xinli Kong, Ying Xu, Yishun Chen, Juyan Zhu, Fengnian Jin, Peng Wang
Summary: In this study, a honeycomb cylindrical shell was prepared to overcome the fracture problem of the hexagonal honeycomb during rolling. The honeycomb sandwich tubes (AHSTs) with a variable Poisson's ratio were successfully fabricated and showed excellent mechanical properties as a core for sandwich structures.
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
Chemistry, Physical
Guangjian Bi, Jianping Yin, Zhijun Wang, Zijian Jia
Summary: The study focused on the dynamic response and mechanical properties of a composite double-layer honeycomb sandwich structure under high-speed impact. The proposed fracture energy calculation method effectively described the structural variation trend, with sensitivity to cell density and material, while the strength of the top core significantly influenced overall energy absorption. The initially designed composite honeycomb sandwich structure showed improved energy absorption compared to traditional honeycomb protection structures.
Article
Materials Science, Composites
Yunfei Deng, Xiaoyu Hu, Xiaoyue Yang, Ziqiang Huang, Yuetong Wang, Chunping Zhou
Summary: This study experimentally investigated the impact resistance of the Nomex honeycomb sandwich structure under strong dynamic loading. By launching aluminum foam projectiles, the deformation process and failure modes of the sandwich panels were studied. The results showed that both the rubber-honeycomb and double-layer honeycomb sandwich structures effectively reduced the deflection change of the back face-sheet and improved the load-bearing capacity under strong load. Qualitative analysis can provide guidance for structural design.
POLYMER COMPOSITES
(2023)
Article
Engineering, Mechanical
Murlidhar Patel, Shivdayal Patel, Suhail Ahmad
Summary: The explosive blast poses a significant threat in the form of terrorist attacks on defense, aerospace, and civilian structures. In order to protect human lives and property, researchers have been searching for blast-resistant structures. This study designed a stainless-steel sandwich structure and investigated the performance of aluminum foam-filled honeycomb and carbon fiber reinforced polymer (CFRP) with steel skins. The results showed that using lightweight FRP on the front and back skins of the sandwich structure reduced deflection and improved energy absorption, enhancing the blast resistance.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Engineering, Civil
Wei Zhang, Jianfeng Li, Zhipeng Wang, Kaikai Li, Chunyu Bai, Qinghua Qin
Summary: The influence of asymmetric faces on the dynamic failure of fully clamped CFRP/aluminum foam composite sandwich beams under low-velocity impact was investigated. Three types of geometrically asymmetric sandwich cross-sections with equal area density were designed, and low-velocity impact experiments were conducted to examine the dynamic response and failure modes. The results showed initial failure modes of top face fracture, indentation, and core shear, while final failure modes included top face fracture, core shear, bottom face fracture at one end, and debonding between the core and bottom face. It was found that the asymmetric composite sandwich beams with a thinner top face exhibited better impact resistance.
ENGINEERING STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Jiaqi Qi, Cheng Li, Ying Tie, Yanping Zheng, Yuechen Duan
Summary: This study investigates a new origami-inspired honeycomb sandwich plate and examines its low-velocity impact response and energy absorption characteristics through experiments and numerical analysis. The results show that the novel sandwich structure outperforms traditional honeycomb structures in terms of impact response and energy absorption.
MATERIALS & DESIGN
(2021)
Article
Mechanics
Nima Movahedi, Matej Vesenjak, Irina Belova, Graeme E. Murch, Thomas Fiedler
Summary: This study explores the dynamic compression behavior and mechanical properties of functionally-graded metal syntactic foams under different particle types and aspect ratios. The findings suggest that uniform metal syntactic foams with lower aspect ratios exhibit higher overall strength, and different particle types show varying responses at higher loading velocities. The dynamic deformation of FG-MSFs originates in the weaker layer and transitions to a stronger layer at higher strains, affecting the stress-strain response.
COMPOSITE STRUCTURES
(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.
Article
Engineering, Multidisciplinary
Nikhil Khaire, Gaurav Tiwari, Vivek Patel, M. A. Iqbal
Summary: The behavior of sandwich panels with honeycomb cores was studied through experimental and numerical investigations. The results showed that offset impact had higher requirements for ballistic resistance and deformation compared to normal impact. Increasing the face sheet and wall thickness improved ballistic resistance, while the inscribe circle diameter had a negative influence. The geometric parameters of the sandwich structure had a significant impact on energy dissipation in different deformation directions.
DEFENCE TECHNOLOGY
(2023)
Article
Mechanics
Mathilde Jean-St-Laurent, Marie-Laure Dano, Marie-Josee Potvin
Summary: The study found that the temperature during impact had almost no effect on the residual compressive strength of damaged sandwich panels, but did affect the damage induced by impact loading. The reduction in strength between pristine panels and those with the least amount of damage tested in the study was more significant than the effect of impact temperature on residual compressive strength.
COMPOSITE STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Umut Caliskan, Munise Didem Demirbas, Omer Erdogan
Summary: This study investigated the performance of sandwich panels with two different core materials and aluminum alloy face sheets under low-velocity impact through experimental and numerical analysis. The contact and impact resistance were examined by analyzing the changes in contact force and kinetic energy. The findings showed that the face-sheet thickness was an important parameter affecting the impact behavior, with polystyrene foam being more effective in preventing impact damage.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Chemistry, Applied
S. J. Amith Kumar, K. Sabeel Ahmed
JOURNAL OF CELLULAR PLASTICS
(2016)
Article
Materials Science, Composites
K. Sabeel Ahmed, V. Mallinatha, S. J. Amith
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2011)
Article
Materials Science, Composites
S. J. Amith Kumar, K. Sabeel Ahmed
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2013)
Article
Materials Science, Multidisciplinary
K. Sabeel Ahmed, Syed Sha Khalid, V. Mallinatha, S. J. Amith Kumar
MATERIALS & DESIGN
(2012)
Article
Engineering, Mechanical
S. J. Amith Kumar, S. J. Ajith Kumar, Bharath K. Nagaraja
Summary: The study focuses on enhancing the thermal stability and fire resistance of polymeric foam core sandwich composites to reduce damages caused by temperature and fire. Experimental results show that phenolic syntactic foam core has better thermal stability than glass/epoxy face skins up to 450 degrees Celsius, aiding in flame isolation.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2021)
Article
Construction & Building Technology
S. J. Amith Kumar, S. J. Ajith Kumar
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Engineering, Mechanical
S. J. Amith Kumar, S. J. Ajith Kumar, A. S. Shamanth Kumar
Summary: By incorporating a stiffening grid honeycomb structure, the structural performance of syntactic-foam core sandwich composites can be improved, specifically in terms of vibration attenuation.
JOURNAL OF VIBRATION ENGINEERING & TECHNOLOGIES
(2023)
