Article
Engineering, Mechanical
Alan T. Nettles, William E. Guin, Isabelle Sadowski
Summary: This study presents experimental results showing that the CAI testing results of aluminum honeycomb core sandwich structure are influenced by material direction. Previous research has shown different CAI strengths, and this study further reveals the cause of this difference, which is the change in ply sequence of the face sheet material.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2022)
Article
Chemistry, Physical
Hang Zhang, Xiaopei Wang, Zhenhan Guo, Yuan Qian, Yan Shang, Deng'an Cai
Summary: This study examines the delamination damage characteristics and laws of glass fiber-reinforced composite honeycomb sandwich structures under different impact energies. Results show that as the impact energy increases, the damage area and extent of delamination also increase. The study also explores repair techniques and process parameters for the delamination damage, with significant improvements observed in the strength recovery rates of the sandwich panels after repair.
Article
Materials Science, Composites
Ahcene Oubouzid, Boualem Keskes, Benoit Vieille
Summary: This study investigated the damage evolution in sandwich panels with different core densities subjected to repeated impacts. Results showed that the permanent indentation on the panel surface gradually increased as the number of impacts increased. The proposed model for describing the changes in the damage parameter showed good agreement with experimental results, with a maximum standard deviation of less than 7% for various core densities.
JOURNAL OF COMPOSITE MATERIALS
(2021)
Article
Engineering, Mechanical
Chris Fischer, Falk Haehnel, Klaus Wolf, Johannes Markmiller
Summary: Honeycomb cores made of phenol resin impregnated paper are commonly used in aircraft sandwich structures. The impact behavior of preloaded honeycomb sandwich structures is not well investigated. Experimental study shows that even low preloads lead to larger structural damage areas and lower residual strength.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2023)
Article
Engineering, Civil
Krzysztof Pelinski, Jerzy Smardzewski
Summary: This study aims to investigate the effect of thin facings on the stiffness, strength, energy absorption, and damage of synclastic panels with an auxetic core. The results show that the facing type significantly influences the overall stiffness and energy absorption ability of the sandwich panel, with cardboard facings being more rigid and better at absorbing energy than PETG facings.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Mechanical
Ke Yuan, Lumin Shen, Wei Xiong, Shaocheng Yao, Jiajie He, Zhonggang Wang
Summary: This study investigates the medium velocity impact response and post-impact flexural behavior of hybrid sandwich structures. The experimental results show that the CFRP face sheets play a dominant role in the impact resistance of sandwiches.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Engineering, Mechanical
Alan T. Nettles, Baxter W. Barnes, William E. Guin, James P. Mavo
Summary: This study presents experimental results of compression after impact (CAI) testing of aluminum honeycomb core sandwich structure with face sheets made of co-cured T1100/3960 quasi-isotropic carbon/epoxy at different loading angles. The study found that the specimens loaded at +22.5 degrees and -22.5 degrees had similar CAI strength compared to the specimens loaded in the 0 degrees direction, while the specimens loaded in the 90 degrees direction had 16% lower CAI strength. Additional specimens loaded at +45 degrees showed intermediate CAI strength values between the 0 degrees and 90 degrees direction.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2023)
Article
Mechanics
Yiming Zhao, Suli Xing, Nianhua Tang, Nan Wu, Jun Tang, Yonglyu He, Changping Yin, Jianwei Zhang
Summary: In this study, a decentralized construction strategy with multiple resonant absorption peaks is proposed to enhance the electrical performance damage tolerance of wave-absorbing honeycomb sandwich structures. The designed sandwich structure shows excellent absorption performance in the 4-18 GHz frequency band, with the effective absorption bandwidth covering the entire band.
COMPOSITE STRUCTURES
(2023)
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
Chemistry, Physical
Piotr Podolak, Magda Drozdziel-Jurkiewicz, Patryk Jakubczak, Jaroslaw Bienias
Summary: An experimental analysis was conducted to evaluate the mechanical behavior of aluminium-based fibre metal laminates under compression after impact. Damage initiation and propagation were assessed for critical state and force thresholds. Parametrization of laminates was done to compare their damage tolerance. Results showed that relatively low-energy impact had a marginal effect on the compressive strength of fibre metal laminates. The aluminium-glass laminate exhibited higher damage resistance while the aluminium-carbon laminate had greater energy dissipation ability. Significant damage propagation before the critical load was observed.
Article
Engineering, Aerospace
Yongwei Wang, Deng Zhou, Gang Yan, Zhuangjie Wang
Summary: This study investigates the residual mechanical properties of honeycomb sandwich composite structures after a lightning strike, using simulated tests and numerical predictions.
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
Yinggang Li, Xiong Wu, Wen Xiao, Song Wang, Ling Zhu
Summary: This study experimentally investigated the ice impact dynamic responses and energy dissipation performance of aluminium honeycomb sandwich panels (AHSPs), demonstrating that ice wedge impact results in smaller impact peak force and structural deformation compared to rigid wedge impact. The permanent deformation profiles of face sheets are approximately axisymmetric, and the increase of top face sheet enhances the ice impact resistance of AHSPs.
COMPOSITE STRUCTURES
(2022)
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
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)
