Article
Mechanics
Sangyoung Yoon, Andreas Schiffer, Wesley J. Cantwell, Tae-Yeon Kim
Summary: Experimental study demonstrates the feasibility of using solitary wave-based diagnostic scheme for detecting core-skin disbonds in composite sandwich structures. The method is effective in detecting larger defects and its performance is influenced by skin thickness.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Multidisciplinary
Kaleeswaran Balasubramaniam, Shirsendu Sikdar, Rohan Soman, Pawel Malinowski
Summary: This paper investigates the use of ultrasonic guided wave propagation and a multi-step approach to assess debonding in a sandwich composite structure. The proposed structural health monitoring strategy effectively detects and locates debonding and damages using a quick damage identification matrix map and improved elliptical wave processing. Experimental and numerical results support the effectiveness of the proposed approach.
Article
Engineering, Multidisciplinary
Jieming Yin, Zechao Wang, Wenlin Liao, Liu Hong, Yangyang Ding, Zude Zhou
Summary: This paper proposes a novel approach to diagnose the integrity of interfacial bonding in honeycomb sandwich using strain measurements. The change ratio of strain modes is used to indicate the defects, and a new damage index is introduced to address diagnostic errors caused by noises.
Article
Engineering, Multidisciplinary
Zhiwei Liao, Pizhong Qiao
Summary: The novel method proposed in this study for interfacial debonding detection in reinforced concrete structures utilizes guided wave and diagnostic insights from a reference structure, demonstrating promising potential for practical applications.
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
Materials Science, Characterization & Testing
Ahmed Aseem, Ching Tai Ng
Summary: This study investigates the nonlinear features of ultrasonic guided waves for debonding detection and location estimation in rebar reinforced concrete structures. Through time-frequency analysis and finite element simulations, the proposed method is shown to be practically viable and beneficial for detecting and locating debonding.
NDT & E INTERNATIONAL
(2021)
Article
Instruments & Instrumentation
Wenqi Du, Lekai Yang, Lingling Lu, Jie Le, Mingkai Yu, Hongwei Song, Xiaodong Xing, Chenguang Huang
Summary: In this study, a method based on multivariate information fusion and physics-guided neural network is developed for the identification of thermal load in honeycomb sandwich structures. The method utilizes temperature gradient and temperature variation rate as thermal feature parameters to build the dataset. Simulations and experiments are conducted to verify the effectiveness of the proposed method, and the results show that it outperforms methods without physical models and single temperature response. The effects of network models and hyper parameters on the proposed method are also discussed.
SMART MATERIALS AND STRUCTURES
(2023)
Article
Chemistry, Analytical
Piotr Fiborek, Pawel Kudela
Summary: This study conducted numerical analysis to explore the influence of damage size on the propagation of elastic waves in a honeycomb sandwich composite panel, with core-skin debonding considered as the damage. By comparing different models and validating in experiments, the study revealed the impact of damage on the amplitude and energy of propagating waves.
Article
Engineering, Mechanical
Aurovinda Kumar Mitra, Aparna A. Aradhye, Dhanashri M. Joglekar
Summary: This paper presents numerical and experimental analyses of guided wave propagation in a tapered honeycomb core sandwich structure. The study aims to understand and utilize the alteration of local wave properties as a function of varying thickness. The results can provide theoretical support and method guidance for wave-based non-destructive evaluation of honeycomb core sandwich structures.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(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
Chemistry, Multidisciplinary
Thomas Bergmayr, Christoph Kralovec, Martin Schagerl
Summary: This study investigates a novel vibration-based thermal health monitoring method for continuous and on-board damage detection in fiber reinforced polymer sandwich structures commonly used in aerospace applications. By using piezoelectric wafer active sensors as excitation source and surface temperature sensors instead of infrared cameras, the study overcomes key hindrances for vibration-based thermography applications in real-life structures.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Multidisciplinary
Beata Zima, Rafal Kedra
Summary: This study presents the results of numerical and experimental analysis on wave propagation in reinforced concrete beams with various degrees of debonding between the steel rod and concrete cover. The propagation of flexural wave modes in damaged beams was theoretically described and experimentally verified, allowing for successful determination of debonding size.
Article
Materials Science, Multidisciplinary
George Irven, Aaron Duncan, Adam Whitehouse, Declan Carolan, Alexander Fergusson, John P. Dear
Summary: The research investigated the failure mechanisms of a composite sandwich structure subjected to projectile impacts, specifically focusing on the influence of CSR nanoparticles. The addition of CSR nanoparticles caused a transition in failure mechanism from sub-interface foam failure to interfacial failure when 6 and 9 wt% CSR were added.
MATERIALS & DESIGN
(2021)
Article
Engineering, Multidisciplinary
Yuqiao Cao, Ching Tai Ng, Scott T. Smith
Summary: This paper investigates the use of Rayleigh wave mixing method for debonding detection in concrete structures strengthened with externally bonded FRP composite plates. A 3D finite element model is developed to simulate the propagation of Rayleigh waves in FRP-strengthened concrete structures. The numerically simulated results are experimentally validated and parametric studies are conducted, proving the practicality, reliability, and sensitivity of the nonlinear Rayleigh wave mixing method for detecting debonding at bonded concrete-FRP interfaces in FRP-strengthened RC structures.
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)
