Article
Nanoscience & Nanotechnology
Xiyuan Zhang, Yu Wang, Xingyao Gao, Yanda Ji, Fengjiao Qian, Jiyu Fan, Haiyan Wang, Lei Qiu, Weiwei Li, Hao Yang
Summary: The study introduced a flexible, lightweight BaTiO3:Sm2O3/SrRuO3/SrTiO3/mica film sensor for high-temperature SHM on aircraft structures with complex curved surfaces, with enhanced properties and stability up to 150 degrees C.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Multidisciplinary
A. Nokhbatolfoghahai, H. M. Navazi, R. M. Groves
Summary: In this paper, the performance of sparse reconstruction and delay-and-sum methods for damage localization was evaluated under various conditions using numerical and experimental methods. The study employed the Taguchi method for experimental design and defined a modified performance index to represent image quality. Results showed that the delay-and-sum method exhibited better robustness under uncontrolled factors, while sparse reconstruction was more reliable for poor baseline subtraction. These findings offer valuable insights for designing reliable structural health monitoring systems.
Article
Engineering, Aerospace
Chung-De Chen, Chia-Hung Hsieh, Chi-Yuan Liu, Yao-Hung Huang, Po-Hao Wang, Rong-Der Chien
Summary: This paper investigates the Lamb wave based structural health monitoring for aluminum bolted joints with multiple-site fatigue damages through experiments. Multiple fatigue cracks were observed at different bolt holes during the fatigue testing. The damage index (DI) was compared before and after the initiation of the fatigue cracks, but it was found to be overestimated due to phase shifts. To overcome this, the envelope damage index (EDI) that considers the envelope curves of the signals was introduced and proved to be a better parameter for monitoring the fatigue crack size and location.
JOURNAL OF AEROSPACE ENGINEERING
(2022)
Article
Materials Science, Ceramics
Xiyuan Zhang, Yu Wang, Xinna Shi, Jie Jian, Xuejing Wang, Min Li, Yanda Ji, Fengjiao Qian, Jiyu Fan, Haiyan Wang, Lei Qiu, Weiwei Li, Hao Yang
Summary: Flexible PZT film sensors are proven to be excellent candidates for receiving Lamb wave in Lamb wave-based SHM of aircraft, demonstrating high sensitivity and potential for real-time monitoring of aging aircraft.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Multidisciplinary
Voon-Kean Wong, Menglong Liu, Wei-Peng Goh, Shuting Chen, Zheng Zheng Wong, Fangsen Cui, Kui Yao
Summary: In this study, direct-write piezoelectric ultrasonic transducers were used to monitor fatigue cracks near fastener holes. A novel ring-design with annular array electrodes and pulse-echo, pitch-catch methods were employed for crack detection. These thin film transducers showed high conformability and potential for structural health monitoring.
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Shuai Jiang, Yiping Shen, Songlai Wang, Wei Jiang, Yi Liu, Qizhou Wu
Summary: By developing a 0-3 PZT/Silicone resin flexible piezoelectric composite sensor (PZT/SR-FPCS), the limitations of using piezoelectric lead zirconate titanate (PZT) ceramics for impact monitoring on curved surface structures are effectively addressed. This sensor has a lower elastic modulus, higher yield and fatigue failure strain, and can correctly detect Lamb wave signals even in high-temperature environments. Experimental results demonstrate the feasibility and effectiveness of this sensor and the proposed impact source localization method based on arrival time difference and wave velocity.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Engineering, Mechanical
Xuerong Liu, Yuanming Xu, Ning Li, Weifang Zhang
Summary: This paper investigates the debonding behavior of piezoelectric sensors in the structural health monitoring system and its impact on the reliability of the monitoring network. Both simulation and experimental results show that the debonding length and direction affect the receiving signal of the sensor. The study also reveals that the increase of right debonding length does not necessarily result in a monotonic decrease in signal amplitude, and the signal amplitude of the sensor is greater when the wave propagation direction is parallel to the sensor debonding direction.
INTERNATIONAL JOURNAL OF MECHANICS AND MATERIALS IN DESIGN
(2023)
Article
Engineering, Multidisciplinary
Ki Chang Kang, Young Hun Kim, Joo Young Pyun, Kwan Kyu Park
Summary: This paper proposes a transmission method, analysis, and implementation of an ultrasound touchscreen system based on Lamb waves. The system utilizes reflected signals to detect touch and improves signal contrast using an inverted phase transmission method. Experimental validation shows that the system performs reliably on a large glass plate without the need for a database.
Article
Mechanics
Yinghong Yu, Xiao Liu, Yihan Wang, Yishou Wang, Xinlin Qing
Summary: This study develops an improved ultrasonic imaging method that utilizes denoising autoencoder learning to extract efficient features and remove noise. Experimental results confirm the ability of this method to suppress noise and enhance singularities induced by anomalies in complex composite structures, with higher localization accuracy and fewer artifacts compared to traditional methods.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Aerospace
Chung-De Chen, Yu-Cheng Chiu, Yao-Hung Huang, Po-Hao Wang, Rong-Der Chien
Summary: This paper presents assessments of structural health monitoring (SHM) for metallic structures through fatigue crack testing and damage index measurements using Lamb waves with various driving frequencies. The study found that using a driving frequency of 450 kHz yielded the best results in crack monitoring, with detectable crack sizes ranging from 4.83 to 5.92 mm based on a threshold damage index of 0.01. The relationship between the damage index and actual crack length, as well as the probability of detection (POD) curves, can be applied to real structures with similar geometries.
JOURNAL OF AEROSPACE ENGINEERING
(2021)
Article
Engineering, Mechanical
Yuan Jiang, Gang Niu
Summary: This paper introduces a novel dispersive signal decomposition method IFETF, which can accurately estimate dispersion curves, separate overlapped components, and improve TF resolution. Through numerical analysis and engineering applications, it is found that IFETF has higher accuracy and efficiency in signal reconstruction and GD estimation compared to traditional methods.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Chemistry, Physical
Yuehao Du, Guangda Wu, Fapeng Yu, Hongchen Miao, Xian Zhao
Summary: Guided-wave-based structural health monitoring (SHM) technology is crucial for real-time inspection of high-temperature structures. The fundamental shear horizontal (SH0) wave is considered ideal for SHM systems due to its non-dispersive properties. However, the availability of SH0 wave transducers for high-temperature SHM is limited by material constraints.
JOURNAL OF MATERIOMICS
(2023)
Article
Engineering, Multidisciplinary
Xiao Liu, Yinghong Yu, Jun Li, Jianjian Zhu, Yishou Wang, Xinlin Qing
Summary: The propagation characteristics of leaky Lamb wave (LLW) when the rigid mold is loaded with water or viscous resin by one side are numerically calculated and experimentally verified. The valid applications of LLW in two-and threedimensional resin flow monitoring of hand lay-up and VARI processes are carried out, achieving effective monitoring of the resin flow front through the PZT sensor network.
Review
Construction & Building Technology
Gabriel M. F. Ramalho, Antonio M. Lopes, Lucas F. M. da Silva
Summary: Lamb waves have shown promising results in NDT and SHM, particularly in monitoring the health of adhesive joints. The paper covers equipment, testing procedures and techniques, as well as discussions on signal processing and statistical methods. Further research is needed in the area of monitoring weak adhesion using Lamb wave-based SHM methods.
STRUCTURAL CONTROL & HEALTH MONITORING
(2022)
Article
Acoustics
Zheng Zheng Wong, Shuting Chen, Menglong Liu, Suo Hon Lim, Fangsen Cui, Kui Yao
Summary: The study investigated the use of commercial structural adhesives/sealants with effective piezoelectric properties for monitoring joint integrity, demonstrating the feasibility of using an epoxy adhesive with inorganic filler for structural health monitoring. The adhesive was found to be able to perform the dual roles of structural bonding and ultrasonic joint integrity monitoring.
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
(2021)
Article
Computer Science, Interdisciplinary Applications
Kwangkyu Yoo, Omar Bacarreza, M. H. Ferri Aliabadi
Summary: A new multi-fidelity modelling-based probabilistic optimisation framework for composite structures is proposed in this paper, which significantly reduces computational time while maintaining high levels of accuracy, demonstrated through engineering examples.
ENGINEERING WITH COMPUTERS
(2022)
Article
Engineering, Multidisciplinary
Aldyandra Hami Seno, M. H. Ferri Aliabadi
Summary: This article presents a novel data-driven stochastic method based on Kriging for impact location and maximum force estimation using Lamb wave features with reliable quantification of output uncertainty. By incorporating statistical pattern matching and uncertainty quantification, the method provides a more reliable estimate for experimental impacts under various simulated conditions, highlighting the suitability of data-driven methods for uncertainty quantification.
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
(2022)
Article
Engineering, Mechanical
Mengke Zhuang, Llewellyn Morse, Zahra Sharif Khodaei, M. H. Aliabadi
Summary: This work establishes a methodology to estimate the fatigue life of an anisotropic structure under uncertainty for the first time, utilizing the statistical inference of the Equivalent Initial Flaw Size Distribution (EIFSD). The challenges of detecting small cracks and predicting their fatigue propagation are overcome by the concept of the EIFSD, combined with a highly efficient computational tool for fatigue modelling problems: The Dual Boundary Element Method (DBEM). The proposed methodology demonstrates accurate fatigue life estimation with small errors compared to the actual fatigue life.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Chemistry, Analytical
Ilias N. Giannakeas, Zahra Sharif Khodaei, M. H. Ferri Aliabadi
Summary: This study presents a framework for estimating the initial investment cost and added weight of integrating a structural health monitoring (SHM) system into an aircraft. The framework breaks down the sensorization activities and costs using wired or printed diagnostic film approaches, and considers the difference between manual and remote data acquisition. Based on a case study of a regional aircraft composite fuselage, there is a trade-off between cost and weight for different SHM options. These estimations capture the characteristics of each system and can be used in cost-benefit analyses for selecting the most suitable configuration.
Article
Engineering, Multidisciplinary
Ilias N. Giannakeas, Zahra Sharif Khodaei, M. H. Aliabadi
Summary: This paper presents a novel framework for compensating the effect of temperature on guided wave structural health monitoring systems. The proposed methodology updates compensation factors using observations obtained at lower scales and propagates the estimated factors to higher scales within a Bayesian framework. The results show that the proposed methodology improves the fidelity of the compensation algorithm and enhances the performance of damage detection and localization.
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Tianyi Feng, M. H. Ferri Aliabadi
Summary: A smart repair patch is proposed in this study for real-time ultrasonic guided wave monitoring in order to enhance the bondline integrity during the repair process of composite materials. Experimental results demonstrate that the developed repair patch can successfully detect and locate damages.
APPLIED SCIENCES-BASEL
(2022)
Editorial Material
Mathematics, Interdisciplinary Applications
Luis Rodriguez-Tembleque, Jose A. Sanz-Herrera, M. H. Aliabadi
JOURNAL OF MULTISCALE MODELLING
(2022)
Article
Instruments & Instrumentation
Francisco J. Canamero, Federico C. Buroni, Ferri M. H. Aliabadi, Luis Rodriguez-Tembleque
Summary: This paper investigates the influence of internal defects, including active phase texture, CNT agglomerations, and interfacial damage, on the piezoelectric performance of composites. The study reveals that interfacial damage significantly affects the piezoelectric constants related to normal strain modes, while the constants related to shear strain remain unchanged. Near the percolation threshold of CNTs, there is a notable improvement in the piezoelectric response. The optimal texture and CNT volume fraction depend on the presence of interfacial damage.
SMART MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Mechanical
J. C. Wen, J. Sladek, V. Sladek, M. H. Aliabadi, P. H. Wen
Summary: This paper presents a Method of Fundamental Solutions (MFS) combined with Erdogan's solutions for Functionally Graded Materials (FGM) to analyze 2D fracture problems under static and dynamic loads. Erdogan derived analytical solutions for a pair of static concentrated forces in an infinite isotropic plate with a straight cut. The contribution of non-homogeneity in equilibrium equations is treated as body forces and requires domain integrals based on Erdogan's fundamental solutions. In dynamic cases, Laplace transformation and Durbin inversion technique are used to determine time-dependent variables such as stress intensity factors. Numerical domain integrals are obtained using the sub-region technique. The accuracy of MFS is demonstrated through four numerical examples and comparisons with different numerical approaches are performed.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
Article
Materials Science, Composites
Haolin Li, Zahra Sharif Khodaei, M. H. Ferri Aliabadi
Summary: A multiscale method is proposed in this paper for modeling damage evolution at the meso and macro scales in plain woven composites. The method employs an averaging theorem to couple macro and micro-scale simulations, allowing simultaneous computations at both scales. The proposed method addresses computational challenges by using a non-local approach to construct the macro-micro interface and introducing machine learning meta-models to reduce computing effort. Experimental tests and comparison with existing criteria validate the accuracy and applicability of the proposed method.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Multidisciplinary
Tong-Rui Liu, Fadi Aldakheel, M. H. Aliabadi
Summary: In this paper, a new and efficient virtual element scheme for phase field modeling of dynamic fracture is proposed using an explicit time integration scheme. The whole problem is divided into two parts: mechanical and damage sub-problems, treated as elastodynamic and Poisson equations respectively. Benchmark problems are validated to test the performance of the proposed numerical framework, showing good agreement with corresponding numerical and experimental studies. Moreover, VEM outperforms FEM in terms of memory efficiency and choice of element type.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Mengke Zhuang, Llewellyn Morse, Zahra Sharif Khodaei, M. H. Aliabadi
Summary: A novel methodology using the Boundary Element Method (BEM) for evaluating the response sensitivities of shallow shell structures is presented. The Implicit Differentiation Method (IDM) is incorporated with BEM to assess the reliability of shallow shell structures. The IDM is validated against analytical solution and Finite Difference Method (FDM), showing high accuracy and efficiency. Sensitivity analysis reveals that uncertainties in curvature, thickness, and applied pressure distribution parameters have the largest impact on structural reliability.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Article
Engineering, Industrial
Ilias N. Giannakeas, Fatemeh Mazaheri, Omar Bacarreza, Zahra Sharif Khodaei, Ferri M. H. Aliabadi
Summary: This study presents a framework for the asset integrity management of composites using a structural health monitoring system. The framework combines physics-based and data-driven models to accurately predict the location, size, and residual strength of the damage.
RELIABILITY ENGINEERING & SYSTEM SAFETY
(2023)
Proceedings Paper
Engineering, Civil
Alessandro De Luca, Donato Perfetto, Francesco Caputo, Zahra Sharif Khodaei, M. H. Aliabadi
Summary: Among the Structural Health Monitoring (SHM) systems, Guided Waves (GW) based ones have been increasingly investigated for their reliability in damage detection, low power consumption requirement, and capability in monitoring extended areas with fewer transducers. However, their use in real applications is still challenging. This research focused on the effects of GW propagation mechanisms in a composite plate at an elevated temperature of 65 degrees C using a validated Finite Element (FE) model. The decrease in GW propagation velocity at 65 degrees C was observed.
EUROPEAN WORKSHOP ON STRUCTURAL HEALTH MONITORING (EWSHM 2022), VOL 2
(2023)
Article
Engineering, Aerospace
Llewellyn Morse, Vincenzo Mallardo, Zahra Sharif-Khodaei, Ferri M. H. Aliabadi
Summary: This paper presents a novel methodology for sensitivity analyses of assembled plate structures using the Boundary Element Method (BEM). The main novelty lies in the derivation of exact implicit derivatives for the BEM formulations of assembled plate structures, which are incorporated into a newly developed Implicit Differentiation Method (IDM). The IDM enables more accurate, robust, and efficient sensitivity analyses for complex and realistic structures compared to previous approaches.
