Article
Materials Science, Characterization & Testing
Lucas Antonio de Oliveira, Guilherme Ferreira Gomes, Joao Luiz Junho Pereira, Matheus Brendon Francisco, Anthonin Demarbaix, Sebastiao Simoes Cunha Jr
Summary: Infrared thermography technique is used to detect damage in metallic and non-metallic materials, and it helps in determining the safety of mechanical structures. Vibrothermography combines vibration and infrared thermography to identify internal damages through temperature mapping. The current study focuses on identifying different research approaches for damage identification and characterization, evaluating heat generation mechanisms in damaged regions, and utilizing mathematical methods to enhance the efficiency of damage detection and characterization.
JOURNAL OF NONDESTRUCTIVE EVALUATION
(2023)
Article
Engineering, Mechanical
Vaclav Triska, Tomas Chlebecek, Jakub Hnidka, Karel Manas
Summary: Honeycomb sandwich structures with carbon composite face sheets combined with aluminium or Nomex (R) honeycomb core are widely used in aircraft airframe structures due to their increased bending strength and stiffness combined with low weight. However, they are highly sensitive to certain types of damage, necessitating non-destructive inspection methods for structural health examination.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2021)
Article
Construction & Building Technology
Ihsan E. Bal, Dimitris Dais, Eleni Smyrou, Vasilis Sarhosis
Summary: This study introduces a monitoring method using reflective markers for crack development in masonry structures under near-infrared light, with experiments showing high accuracy and potential applications in heritage buildings and foundation settlement issues.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Physical
Milan Sapieta, Vladimir Dekys, Peter Kopas, Lenka Jakubovicova, Zdenko Savrnoch
Summary: Thermal imaging is a non-destructive test method that uses an external energy source to excite and measure the temperature distribution of the material under test. The number of excitation periods is an important parameter in lock-in thermography, which is used to calculate the phase image showing defects or inhomogeneities in the material. The choice of the number of periods affects the noise level and potential damage to the sample.
Article
Optics
Yanling Chen, Lianglun Cheng, Heng Wu, Fei Mo, Ziyang Chen
Summary: The proposed method utilizes an iterative differential thermal information filter to fuse infrared and visible images, resulting in a fusion image with prominent thermal targets from the infrared image and detailed information from the visible image. Experimental results demonstrate the advantages and effectiveness of the method compared to deep learning and non deep learning-based methods.
OPTICS AND LASERS IN ENGINEERING
(2022)
Article
Computer Science, Artificial Intelligence
Bernardo B. Schwedersky, Bernardo C. F. de Oliveira, Armando Albertazzi, Rodolfo C. C. Flesch
Summary: This study introduces an approach based on self-organizing maps for analyzing defects in optical thermography and shearography images of carbon fiber reinforced epoxy samples. The comparison results indicate that this method can provide clean and reliable segmentation results with higher adaptability.
EXPERT SYSTEMS WITH APPLICATIONS
(2022)
Article
Engineering, Multidisciplinary
Siavash Doshvarpassand, Xiangyu Wang, Xianzhong Zhao
Summary: Corrosion is a destructive phenomenon affecting almost all metals, and active infrared thermography is an online and non-intrusive method of non-destructive testing that has shown capabilities of detecting sub-surface metal loss. However, challenges such as thermal reflections, non-uniform stimulation, and lack of a priori knowledge hinder the effective observation of sub-surface defects.
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
(2022)
Article
Engineering, Multidisciplinary
Oscar D. Pedrayes, Dario G. Lema, Ruben Usamentiaga, Pablo Venegas, Daniel F. Garcia
Summary: This paper evaluates and compares semantic segmentation networks in the field of subsurface defect detection using infrared thermography. The study demonstrates that DeepLabV3+ outperforms Random Forest and Support Vector Machines in defect detection.
Article
Engineering, Electrical & Electronic
Xianyu Wu, Bin Zhou, Feng Huang, Peng Lin, Rongjin Cao
Summary: In this paper, a post-processing method based on compressive sensing for uncooled IR sensors is proposed to perform super-resolution NDT thermography. The method generates super-resolution IR phase images by using a sparse representation of low-resolution IR images and a sparse dictionary generated from high-resolution raw training image patches. The method is verified using pulsed phase thermography and shows improved visual effect and reduced mean square error compared to other methods. The proposed method is expected to enable wider application of uncooled IR sensors in NDT.
IEEE SENSORS JOURNAL
(2022)
Article
Humanities, Multidisciplinary
Guimin Jiang, Xin Wang, Jue Hu, Yang Wang, Xin Li, Dazhi Yang, Miranda Mostacci, Stefano Sfarra, Xavier Maldague, Qiang Jiang, Hai Zhang
Summary: In recent years, the conservation and protection of ancient cultural heritage have become increasingly important. Non-destructive testing (NDT) plays a crucial role in minimizing damage to the test subjects. This study used infrared thermography for non-invasive investigation and evaluation of ancient polyptychs, and numerical simulation to reduce the number of experiments on actual samples. The implementation of an image processing algorithm improved the observability and contrast of the experimental results.
Article
Construction & Building Technology
Alper Ozmen, Erkut Sayin
Summary: In order to prevent earthquake damage to historical masonry structures, accurate information on their material properties is important for reliable computational modelling and strengthening intervention programs. This study compared destructive and non-destructive techniques used to evaluate the original and restoration stones of Tas,horan Church in Malatya, Turkey, presenting the test results.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Metallurgy & Metallurgical Engineering
A. Kusbiantoro, A. H. Ismail, S. K. Jema'in, K. Muthusamy, F. F. Zainal
Summary: This study developed a new method for measuring the compressive strength of geopolymer concrete using infrared imaging analysis and Thermal Diameter Variation (TDV) rate. The results showed that focusing on the warmer region during the procedure improved the accuracy of the measurement.
ARCHIVES OF METALLURGY AND MATERIALS
(2023)
Article
Polymer Science
Song Gao, Yunpeng Liu, Le Li
Summary: The abnormal heating of composite insulators on transmission lines is a serious threat to the safe and stable operation of the power grid. Indiscriminate replacement of different types of abnormal heating composite insulators wastes labor and material resources. This study investigates the abnormal heating of composite insulators under different environmental humidity and wind speed conditions. The results show that the heating phenomenon is influenced by factors such as aging, humidity, and contamination, and on-site infrared inspection should be conducted under specific weather conditions to ensure accurate measurements.
Review
Chemistry, Physical
Xiaoling Yan, Houpu Wang, Xiaozhi Fan
Summary: Nonlinear ultrasonic nondestructive testing technology has been used for early damage testing in metal materials due to the limitations of conventional ultrasonic testing methods. This paper provides an in-depth analysis of classical nonlinear ultrasonic theoretical models and introduces the application and research progress of nonlinear ultrasonic detection technology derived from different acoustic nonlinear effects. The key technologies and problems are summarized to contribute to the further development and promotion of nonlinear ultrasonic nondestructive testing technology.
Article
Archaeology
Mariusz Felczak, Mariusz R. Rychter, Boguslaw Wiecek
Summary: The paper investigates two partially damaged military dog tags, focusing on identifying the originally stamped characters using multispectral methods, including infrared and visible techniques.
JOURNAL OF CULTURAL HERITAGE
(2022)
Article
Engineering, Multidisciplinary
Andrzej Katunin, Ivanna Pivdiablyk, Laurent Gornet, Patrick Rozycki
Summary: This paper presents a hybrid method that combines fatigue limit evaluation with non-destructive evaluation to predict the behavior of composite structures with low-velocity impact damage. The results demonstrate the high sensitivity of the proposed method to impact damage and its ability to evaluate the fatigue life of tested structures. Recommendations for measurement setup and testing parameters are also provided.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Chemistry, Analytical
Sandris Rucevskis, Tomasz Rogala, Andrzej Katunin
Summary: Optimal sensor placement is crucial in monitoring structural health, balancing performance and cost. This study investigated the problem using a composite plate with simulated damage and applied different sensor placement methods. The proposed approach allowed precise damage detection with resource-saving benefits in both costs and computational time.
Article
Mechanics
Andrzej Katunin, Dominik Wachla, Paulo Santos, Paulo N. B. Reis
Summary: This study investigates the influence of hybridization on the fatigue limit of bio-composites made of flax, glass/flax, Kevlar/flax, and carbon/flax. The evaluation is done using the critical self-heating temperature and acoustic emission approaches, as well as microscopic characterization for analyzing fracture mechanisms. The results show that hybridization opens new possibilities for controlling the fatigue and fracture properties of composites, and the critical self-heating temperature determined during fatigue tests can serve as an alternative indicator of the fatigue limit of a composite structure, as justified by microscopic examination.
COMPOSITE STRUCTURES
(2023)
Article
Chemistry, Analytical
Duc Cong Nguyen, Marek Salamak, Andrzej Katunin, Michael Gerges
Summary: Diagnostic load testing is essential for predicting the health state and load capacity of structures. This research proposes an improved method to automatically calibrate the analytical model using field data. The updated model provides more accurate predictions of load limits.
Review
Polymer Science
Jafar Amraei, Andrzej Katunin
Summary: The self-heating effect is a catastrophic phenomenon that occurs in polymers and polymer-matrix composites (PMCs) under fatigue loading or vibrations. It results in temperature growth in these structures due to their low thermal conductivities, leading to thermal stress and fatigue failure. Therefore, understanding and minimizing the self-heating effect is crucial for practical applications.
Article
Chemistry, Analytical
Sandris Rucevskis, Tomasz Rogala, Andrzej Katunin
Summary: Monitoring damage in composites using vibration-based structural response is challenging due to the complexity of fracture mechanisms. Implementing a health monitoring system is also complex, considering uncertainties and constraints like measurement noise and changing environmental conditions. This study aims to develop a cost-effective data-driven approach to monitor damage in composites and validate it with tests on a physically implemented SHM system. By combining finite element models and laboratory experiments, the developed approach enables the implementation of a cost-effective SHM system with validated predictive performance.
Article
Materials Science, Composites
Aravind Premanand, Tomasz Rogala, Dominik Wachla, Jafar Amraei, Andrzej Katunin, Bilal Khatri, Michael Rienks, Frank Balle
Summary: Conventional VHCF testing is time-consuming and impractical for large sample sizes. This study investigates the fatigue strength of a CF/PEKK composite by estimating its temperature evolution during 3-point bending tests at 20 kHz with different cyclic load amplitudes. The results demonstrate a reliable and rapid method for estimating fatigue life as a material property.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Andrzej Katunin, Wojciech Danek, Angelika Wronkowicz, Krzysztof Dragan
Summary: In this paper, a hybrid methodology is proposed to evaluate the residual strength of composite structures by using ultrasonic non-destructive testing technique, numerical modeling, and compression after impact (CAI) tests. This method can effectively predict the residual strength of composite materials while considering the complex geometrical shapes and fracture mechanisms of composites.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Andrzej Katunin, Krzysztof Lis, Kamil Joszko, Pawel Zak, Krzysztof Dragan
Summary: This paper proposes an enhancement to the D-Sight non-destructive testing technique by allowing quantification of hidden corrosion in metallic aircraft fuselages. The approach involves image processing to quantify the spatial dimensions of corroded areas from D-Sight images, and finite element modeling to determine corrosion depth and degree. Validations were conducted using metrological measurements and digital image correlation techniques, correcting for overestimation typical of the D-Sight technique. The results provide a lower bound for the detectability of hidden corrosion using D-Sight, improving inspections of aircraft structures where this remains a serious and unresolved issue.
Article
Chemistry, Analytical
Andrzej Katunin, Piotr Synaszko, Krzysztof Dragan
Summary: In this paper, the authors introduced a new approach to automatically quantify hidden corrosion based on image processing D-Sight images during periodic inspections. The developed processing algorithm was shown to effectively evaluate the extent and progression of hidden corrosion and aligned with the results of qualitative analysis by inspectors. This enables the automation of the inspection process and supports inspectors in assessing hidden corrosion.
Article
Chemistry, Analytical
Andrzej Katunin, Marko Nagode, Simon Oman, Adam Cholewa, Krzysztof Dragan
Summary: This study proposed a method to monitor hidden corrosion growth in metallic aircraft structures using a sequence of D-Sight images, by analyzing the images through geometric transforms and segmentation techniques to eliminate the influence of measurement conditions.
Proceedings Paper
Construction & Building Technology
Andrzej Katunin, Angelika Wronkowicz-Katunin, Wojciech Danek, Krzysztof Dragan, Marek Wylezol
Summary: This study presents an approach based on reverse engineering to evaluate the structural residual life of composite elements affected by low-velocity impact loading. By combining non-destructive testing and numerical simulations, the geometric properties of damage were determined, and computer-aided design models were developed to predict the structural response.
4TH INTERNATIONAL CONFERENCE ON STRUCTURAL INTEGRITY (ICSI 2021)
(2022)
Proceedings Paper
Construction & Building Technology
Andrzej Katunin, Sandris Rucevskis
Summary: This paper analyzes and compares two different approaches (damage indices and curvelet transform) for damage identification in composite plates and evaluates their sensitivity to damage, robustness to measurement and processing noise, and accuracy of damage estimation. The results clearly indicate the superiority of the curvelet transform, which not only accurately identifies damage with enhanced directional selectivity but also reduces measurement noise, making it an excellent choice for effective damage identification in various engineering structures.
4TH INTERNATIONAL CONFERENCE ON STRUCTURAL INTEGRITY (ICSI 2021)
(2022)
Proceedings Paper
Construction & Building Technology
Tomasz Rogala, Piotr Przystalka, Andrzej Katunin
Summary: Due to the automation of industrial processes, intelligent decision-making tools are in high demand in various industries, including non-destructive evaluation. This paper presents a preliminary study on a damage classification algorithm based on deep neural networks, which aims to classify different types of structural damage in composites using X-ray computed tomography scans. The results demonstrate the effectiveness of the proposed approach and provide a pathway for further algorithm development.
4TH INTERNATIONAL CONFERENCE ON STRUCTURAL INTEGRITY (ICSI 2021)
(2022)
Article
Mechanics
Rawan Aqel, Patrick Severson, Rani Elhajjar
Summary: A novel core splice joint configuration for composite sandwich structures is studied and proposed to improve the strength and toughness. Experimental and numerical efforts show that this configuration can significantly increase the ultimate strength by 13% to 51% and the toughness by 2% to 35%.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Xianheng Wang, Cong Chen, Jinsong Zhang, Xinming Qiu
Summary: In this paper, a new form-finding method based on spatial elastica model (FMSE) is proposed for elastic gridshells. The method integrates the deformations of elastic rods into the overall deformation of the gridshell, and solves a set of transcendental equations using the quasi-Newton method to ensure the deformation satisfies the given boundary conditions. The method is validated through experiments and expected to have potential applications in the investigations of elastic gridshells.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Hao Huang, Zitong Guo, Zhongde Shan, Zheng Sun, Jianhua Liu, Dong Wang, Wang Wang, Jiale Liu, Chenchen Tan
Summary: The conventional evaluation of 3D braided composites' mechanical properties through numerical and experimental methodologies hinders material application due to the expenses, time constraints, and laborious efforts involved. This study establishes a multi-scale finite element model and a surrogate model for predicting the elastic properties of 3D4D rotary braided composites with voids. By optimizing a neural network model, the results are validated and provide valuable insights into the microstructure and properties of these composites.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Xinyu Li, Hao Zhang, Haiyang Yang, Junrong Luo, Zhongmin Xiao, Hongshuai Lei
Summary: Due to their excellent mechanical properties and design flexibility, fluted-core composite sandwich structures have gained significant attention in aerospace and rail transit applications. This study investigated the free-vibration characteristics and optimized design of composite fluted-core sandwich cylinders through theoretical models and experimental tests.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Chao Li, Chunzheng Duan, Xiaodong Tian, Chao Wang
Summary: A mechanistic model considering the bottom edge cutting effect and the anisotropic characteristics of the material is proposed in this paper to accurately predict cutting forces. The model was validated through a series of milling experiments and can be used to predict the cutting force of various parts of the cutter and any feed direction.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Camila Sanches Schimidt, Leopoldo Pisanelli Rodrigues de Oliveira, Carlos De Marqui Jr
Summary: This work investigates the vibro-acoustic performance of graded piezoelectric metamaterial plates. The study shows that piezoelectric metamaterial plates with reconfigurable properties can provide enhanced vibration and sound power attenuation.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Jun Ke, Li-jie Liu, Zhen-yu Wu, Zhong-ping Le, Luo Bao, Dong-wei Luo
Summary: Compared with other green natural fibers, ramie has higher mechanical properties and lower cost. In this study, ramie and glass fiber are made into composite circular tubes. The results show that the hybrid circular tube with ramie and glass fiber has improved torsional mechanical properties and reduced weight and cost. The failure mechanisms are affected by the loading direction and the content of each fiber.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Natalia Pingaro, Gabriele Milani
Summary: This paper proposes an enhanced analytical model for predicting the behavior of FRCM samples tested under standard tensile tests. The model takes into account the interaction between fibers and matrix through the interface, and assumes different material properties at different phases. By solving a second order linear differential equation, an analytical solution can be obtained. The model is validated with experimental data and shows good predictability.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Jialiang Fan, Anastasios P. Vassilopoulos, Veronique Michaud
Summary: This article investigates the effects of voids, joint geometry, and test conditions on the fracture performance of thick adhesive Double Cantilever Beam (DCB) joints. It concludes that grooved DCB joints with low void content tested at low displacement rates showed stable crack propagation without significant crack path deviation.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Auwalu I. Mohammed, Kaarthikeyan Raghupathy, Osvaldo De Victoria Garcia Baltazar, Lawson Onokpasah, Roger Carvalho, Anders Mogensen, Farzaneh Hassani, James Njuguna
Summary: This study investigates the performance of composite pressure vessels under damaged and undamaged conditions, providing insights into their reliability and residual strength capabilities. The results demonstrate that the damage profile and its effect on compressive strength are similar between damaged and non-damaged cylinders. When subjected to quasi-static compression, the polyethylene liner absorbs enough elastic strain energy to recover without plastic deformation. Additionally, quasi-static compression has little to no influence on the axial strength of the cylinders. The damage characterization reveals fiber breakage, delamination, local buckling, and brooming failure. This study has direct implications for the safety design tolerances, manufacturing strategies, and operational failure conditions of composite overwrapped pressure vessels (COPVs).
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Muhammad Irfan Shirazi, Samir Khatir, Djilali Boutchicha, Magd Abdel Wahab
Summary: Structural health monitoring is important to ensure the safety of components and structures. This study proposes a method using finite element models and 1D-CNN network to extract and classify vibration responses for crack detection. The results show that the proposed approach is effective in real-time damage detection.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Maryam Mirsalehi, Kiarash Kianpour, Sharif Shahbeyk, Mohammad Bakhshi
Summary: This study comprehensively investigates the one-way response of 3D-woven sandwich panels (3DWSPs) and their interfering parameters, providing interpretation of elastic and failure results, failure maps, and reliable theoretical models for linear elastic response and observed failure mechanisms.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Yiming Zhao, Zhonggang Wang, Zhigang Yang, Bin Qin
Summary: The paper proposes a Ritz and statistical energy analysis (Ritz SEA) hybrid method for calculating rectangular plate acoustic vibration coupling in the mid-frequency range. This method combines the fast convergence and ability to handle arbitrary boundary conditions of the Ritz method with the power flow equation of the statistical energy analysis method. The results show that this approach effectively filters out random fluctuations in mid-frequency domains while demonstrating exceptional stability and precision.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Joao Henrique Fonseca, Woojung Jang, Dosuck Han, Naksoo Kim, Hyungyil Lee
Summary: This study addresses the enhancement of an injection-molded fiber-reinforced plastic / metal hybrid automotive structure and its plastic injection molding process through the integration of the finite element method, artificial intelligence, and evolutionary search methods. Experimental validation of finite element models, the generation of a database through orthogonal array and Latin hypercube methods, and the training of artificial neural networks are conducted. The genetic optimization algorithm is then applied to identify optimal process parameters. The results show significant reduction in product warpage and manufacturing time while maintaining structural strength, contributing to the advancement of composite automotive structures with superior quality.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Alessandro Vescovini, Carina Xiaochen Li, Javier Paz Mendez, Bo Cheng Jin, Andrea Manes, Chiara Bisagni
Summary: This paper presents a study on six single-stringer specimens manufactured using the card-sliding technique with non-crimp fabrics and adopting a Double-Double (DD) stacking sequence. The specimens were tested under compression loading conditions to investigate post-buckling and failure in aerospace structures. Experimental results and numerical simulations were compared to analyze the behavior and failure modes of the specimens. The study found promising evidence of a viable solution to optimize aeronautical structures and enhance resistance to skin-stringer separation, particularly with the use of tapered flanges.
COMPOSITE STRUCTURES
(2024)