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
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
Construction & Building Technology
A. Villalobos, R. O. Ruiz, V Meruane
Summary: A baseline-free method utilizing regressive Gaussian processes and Bayesian scheme was proposed to evaluate debonding on composite panels. The estimation of undamaged vibration modes was carried out by modifying optimal hyperparameters determined from the damaged plate, and a damage index was obtained by comparing the differences between curvatures of damaged and undamaged modes. Finally, k-means clustering was used to identify damage size and location, showing favorable results in numerical simulations and experimental tests.
STRUCTURAL CONTROL & HEALTH MONITORING
(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
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
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
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, 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, Civil
Zichen Yan, Yan Liu, Junbo Yan, Wen Wu, Fan Bai, Fenglei Huang
Summary: This study compares the blasting characteristics between regular hexagonal and auxetic honeycomb sandwich beams using experimental and numerical analyses. The results reveal that auxetic honeycomb cores have enhanced energy absorption capacity and using unbonded face sheets can reduce global flexural bending.
THIN-WALLED STRUCTURES
(2023)
Article
Mechanics
Jiu-Tao Hang, Wei Zhao, Lei Liu, Guang-Kui Xu
Summary: In this study, the damage sensitivity of a composite honeycomb sandwich structure with face-core de-bonding defects or impact damage was evaluated through in-plane compression, 4-point bending experiments, and FEM simulations. It was found that the structure is more sensitive to impact damage than to de-bonding defects. Impact damage with an energy range of 3 J-5.5 J can significantly change the failure mode and reduce the strength of the structure, while de-bonding defects of the same size only cause a minor decrease in strength. The developed FEM model accurately predicts the failure modes and residual strengths observed in experiments, indicating that the structural characteristics during impact loading are the main contributors to structural failure. Our model provides a useful tool for studying the mechanical behaviors of honeycomb sandwich structures.
COMPOSITE STRUCTURES
(2023)
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, Mechanical
Yang Jin, Xin-Yu Jia, Qian-Qian Wu, Guo-Cai Yu, Xiao-Lei Zhang, Shuai Chen, Lin-Zhi Wu
Summary: In this study, a lightweight cylindrical honeycomb sandwich structure with low-frequency vibration attenuation ability is designed and verified through theoretical analysis and experimental validation. The study confirms the excellent vibration suppression performance of the proposed cylindrical meta-structure with a plate inside.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
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
Engineering, Mechanical
Zhonggang Wang, Xinxin Wang, Kai Liu, Jian Zhang, Zhaijun Lu
Summary: This study introduces two dimensionless indexes to assess the crashworthiness of honeycomb sandwich structures under low-speed oblique impact, which can better capture the crashworthiness of sandwich structures of different configurations.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Chemistry, Physical
Xueying Dong, Yuting Yu, Xuyang Jing, Hanmei Jiang, Tao Hu, Changgong Meng, Chi Huang, Yifu Zhang
Summary: The study introduces a sandwich-like structure to improve the electrochemical properties of Co2SiO4, forming a 3D honeycomb structure which significantly enhances the specific capacitance and power performance.
JOURNAL OF POWER SOURCES
(2021)
Article
Engineering, Multidisciplinary
Gabriel San Martin, Enrique Lopez Droguett, Viviane Meruane, Marcio das Chagas Moura
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
(2019)
Article
Engineering, Multidisciplinary
David Benjamin Verstraete, Enrique Lopez Droguett, Viviana Meruane, Mohammad Modarres, Andres Ferrada
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
(2020)
Article
Engineering, Chemical
Barbara Arnauda, Ali Akbari-Fakhrabadi, Nina Orlovskaya, Viviana Meruane, Wakako Araki
Article
Computer Science, Artificial Intelligence
Joaquin Figueroa Barraza, Enrique Lopez Droguett, Viviana Meruane Naranjo, Marcelo Ramos Martins
APPLIED SOFT COMPUTING
(2020)
Article
Engineering, Mechanical
Alessandro Casaburo, Giuseppe Petrone, Viviana Meruane, Francesco Franco, Sergio De Rosa
Summary: This study investigates the structural properties of Aluminium Foam Sandwich (AFS) panels and similitude methods to reduce the cost and time of experimental tests. It is found that scaled-down models can be used instead of full-scale structures for testing, and combining multiple parameters into one with physical meaning can simplify similitude conditions.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2021)
Article
Computer Science, Interdisciplinary Applications
Leonel Quinteros, Viviana Meruane, Eduardo Lenz Cardoso
Summary: The emergence of additive manufacturing and advances in structural optimization have led to the development of tailored cellular materials with complex architectures that show higher structural efficiency compared to traditional materials. Truss-like cellular structures, in particular, have great potential for lightweight applications due to their high strength/stiffness to mass ratio. These materials may also exhibit impressive vibration isolation properties known as phononic band gaps. The study focuses on the topology optimization of 2D truss-like cellular structures to create a material with outstanding vibration isolation at specific frequency ranges. The proposed formulation effectively addresses convergence problems associated with mode switching and repeated eigenvalues.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2021)
Article
Engineering, Mechanical
A. Casaburo, G. Petrone, V Meruane, F. Franco, S. De Rosa
Summary: The use of similitude theory in this study goes beyond predicting prototype dynamic responses, instead supporting and validating experimental measurements affected by noise. Through analyzing Aluminium Foam Sandwich (AFS) plates with Digital Image Correlation (DIC) cameras and applying the SAMSARA similitude method, researchers were able to demonstrate the reliability of measurements when spatial patterns in resonance were recognizable. Similitude methods serve as a valuable tool in determining the quality of measurements and should not be overlooked in analyzing noisy data.
EXPERIMENTAL TECHNIQUES
(2022)
Article
Construction & Building Technology
A. Villalobos, R. O. Ruiz, V Meruane
Summary: A baseline-free method utilizing regressive Gaussian processes and Bayesian scheme was proposed to evaluate debonding on composite panels. The estimation of undamaged vibration modes was carried out by modifying optimal hyperparameters determined from the damaged plate, and a damage index was obtained by comparing the differences between curvatures of damaged and undamaged modes. Finally, k-means clustering was used to identify damage size and location, showing favorable results in numerical simulations and experimental tests.
STRUCTURAL CONTROL & HEALTH MONITORING
(2021)
Article
Engineering, Mechanical
Alessandro Casaburo, Giuseppe Petrone, Viviana Meruane, Francesco Franco, Sergio De Rosa
Summary: Similitude theory was introduced in the last century, allowing engineers to design scaled versions of structures using similitude methods. While traditional laws may fail in predicting dynamic behavior when similitude is distorted, artificial neural networks have proven to be robust in predicting response characteristics and model identification.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2022)
Article
Acoustics
Viviana Meruane, Diego Aichele, Rafael Ruiz, Enrique Lopez Droguett
Summary: A novel approach for assessing damage in composite sandwich structures is proposed in this study, using high-speed 3D DIC measurements and deep learning techniques to automatically identify damaged regions through full-field vibration mode shape recognition and damage image processing.
SHOCK AND VIBRATION
(2021)
Article
Chemistry, Physical
Leonel Quinteros, Viviana Meruane, Eduardo Lenz Cardoso, Rafael O. Ruiz
Summary: Recent progress in additive manufacturing and structural topological optimization has driven the development of custom cellular materials with complex topologies, leading to improved structural efficiency. Truss-like cellular structures show promise for lightweight applications due to their excellent strength-to-mass ratio and unique vibration properties, such as the phononic bandgap. By optimizing the topology of sandwich panels using cellular truss cores, significant benefits can be achieved in various applications, including satellites, spacecraft, aircraft, ships, and automobiles, by maximizing the phononic bandgap.
Article
Chemistry, Analytical
Viviana Meruane, Sergio J. Yanez, Leonel Quinteros, Erick I. Saavedra Flores
Summary: This paper investigates the problem of damage detection in steel-concrete composite structures using an impact-hammer-based modal testing procedure. A mathematical formulation is adopted to identify regions where stiffness varies without the need for theoretical models, and a curvature change criterion is used to quantify stiffness reduction. A stiffness variability index is generated for multiple points on the structure, resulting in a damage distribution pattern. The effectiveness of this damage detection strategy is validated through comparison with experimental data.
Article
Materials Science, Ceramics
Ali Akbari-Fakhrabadi, Javier Quintana, Gaspar Fabrega, Sagarkumar Zalavadiya, Wakako Araki, Viviana Meruane, Paulina Valenzuela, William Gacitua
Summary: The mechanical properties of BaFeO3-δ (BFO) and BaFe0.9Zr0.1O3-δ (BFZO) oxides synthesized by sol-gel method were investigated and compared at room temperature and 850 degrees C. The results showed that Zr-doping stabilized the crystal structure of BFZO, and BFO exhibited ferroelastic behavior at room temperature. Both BFO and BFZO showed linear elastic behavior at 850 degrees C. Additionally, Zr-doping improved the creep resistance of BFO.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Engineering, Manufacturing
Ivan Gonzalez Perez, Viviana Meruane, Patricio F. Mendez
Summary: Gas metal arc welding (GMAW) is a widely used metal-joining method in industrial manufacturing. The metal-transfer process in GMAW plays a crucial role in welding quality. This study utilizes deep learning segmentation models to isolate droplets in GMAW video footage and computes their properties for dynamic characterization. The proposed fully convolutional network (FCN) approach demonstrates reliable droplet segmentation within minutes, allowing for the calculation of valuable process variables.
JOURNAL OF MANUFACTURING PROCESSES
(2023)
Proceedings Paper
Acoustics
A. Casaburo, G. Petrone, V Meruane, F. Franco, S. De Rosa
PROCEEDINGS OF INTERNATIONAL CONFERENCE ON NOISE AND VIBRATION ENGINEERING (ISMA2020) / INTERNATIONAL CONFERENCE ON UNCERTAINTY IN STRUCTURAL DYNAMICS (USD2020)
(2020)
