Article
Engineering, Multidisciplinary
Yuhan Gao, Chuanguo Xiong, Xin Lei, Yuhua Huang, Weishan Lv, Fulong Zhu
Summary: In this study, a super-resolution (SR) reconstruction method coupled with projection speckle DIC was proposed to improve the accuracy of detecting the reliability of electronic packaging structure. By optimizing the algorithm based on the maximum a posteriori model for DIC measurement systems and introducing a speckle-specific bimodal prior, the accuracy of measurements was improved. Experimental results showed that the use of SR technology reduced displacement errors from 8 μm to 2 μm and reduced the error between DIC measurements and Moire interferometry from 5 μm to within 2 μm. Therefore, SR technology can effectively enhance projection speckle DIC measurements in electronic packaging reliability testing.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2023)
Article
Optics
J. P. Goulmy, S. Jegou, L. Barrallier
Summary: Digital image correlation (DIC) is widely used in many fields. A new method is proposed to define the quality of images in a fast and precise way, which saves time in optimizing image acquisition conditions, speckle, and DIC parameters.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Xiaoying Zhang, Xiaojun Tang, Liping Yu, Bing Pan
Summary: This article introduces an automated camera exposure control method that enhances the accuracy of stereo-DIC measurement and captures high-quality speckle image pairs. With this method, the two cameras can automatically adjust their exposures and grayscale to obtain the optimal reference image pair and adapt to ambient light variations during testing.
Article
Materials Science, Multidisciplinary
J. Yang, J. L. Tao, C. Franck
Summary: This study introduces a new, robust, and efficient technique for printing DIC speckle dot patterns on both planar and non-planar sample surfaces using a custom-modified 3D printer in an automated fashion. By controlling the extrusion volume and spatial positioning of the print head, accurate patterns can be printed for tracking large and heterogeneous deformations in highly compliant and porous materials, as well as materials with significant 3D topographies. The technique achieves high accuracy in measuring displacements and strains in materials.
EXPERIMENTAL MECHANICS
(2021)
Article
Chemistry, Multidisciplinary
Kumar Kumarapu, Shashi Mesapam, Venkat Reddy Keesara, Anoop Kumar Shukla, Naga Venkata Sai Kumar Manapragada, Babar Javed
Summary: Reinforced cement concrete (RCC) is a widely acknowledged low-cost, rigid, and high-strength construction material. In order to evaluate the performance of bridges, the non-contact optical measurement technique called digital image correlation (DIC) technique has been developed, which can measure the deformation of bridges using drones.
APPLIED SCIENCES-BASEL
(2022)
Review
Optics
Ghulam Mubashar Hassan
Summary: Digital Image Correlation (DIC) has been successful in measuring deformation remotely, but has limitations in measuring discontinuous deformation, restricting its application to lab environment. This study systematically analyzes different methodologies to overcome the limitations of DIC and presents future research directions in this area.
OPTICS AND LASERS IN ENGINEERING
(2021)
Article
Engineering, Mechanical
Klemen Zaletelj, Vid Agrez, Janko Slavic, Rok Petkovsek, Miha Boltezar
Summary: The proposed method utilizes laser-light interference to form a speckle pattern for DIC measurements without modifying the surface of the structure, with speckle size depending on factors such as surface roughness.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Forestry
Elena Fernandez Zuniga, Luis Garcia Esteban, Francisco Garcia Fernandez, Paloma de Palacios, Alberto Garcia-Iruela, Ismael Garcia, Miguel Lozano, Alfonso Fernandez Canteli
Summary: Shear testing is a commonly used method to assess plywood bonding quality. This study used digital image correlation (DIC) to obtain information about fracture modes in plywood. Statistical extreme value theory was applied to assess the results, providing reliable failure strength values. DIC was found to provide greater knowledge of the failure process.
Article
Chemistry, Analytical
Krzysztof Mendrok, Angel J. Molina-Viedma, Elias Lopez-Alba, Francisco A. Diaz Garrido, Lukasz Pieczonka
Summary: This paper focuses on load identification in Structural Health Monitoring systems, demonstrating that it is feasible to achieve it through the analysis of response signals captured with high-speed 3D Digital Image Correlation technology. Experimental results show that the proposed method for load identification is effective for a frame structure under broadband vibration excitation.
Article
Engineering, Multidisciplinary
Zhenning Liang, Jinxiu Zhang, Longhui Qiu, Guangyi Lin, Fengfu Yin
Summary: The digital image correlation technique with non-fixed camera is developed for deformation measurement in the field, providing a more flexible and convenient method to measure deformation of high altitude facilities. Multiple images and feature templates are used for correction to ensure accuracy.
Article
Engineering, Multidisciplinary
Ruiyang Wang, Xinwei Zhang, Dahai Li
Summary: Traditional phase measuring deflectometry and digital image correlation based deflectometry have limitations in dynamic measurement, while our proposed single-shot dynamic speckle deflectometry offers a solution with validated accuracy and robustness through numerical simulations and practical measurements.
Article
Multidisciplinary Sciences
Ilya Balmages, Janis Liepins, Ernests Tomass Auzins, Dmitrijs Bliznuks, Edgars Baranovics, Ilze Lihacova, Alexey Lihachev
Summary: The study utilized laser speckle imaging technique to record and visualize the growth and activity of microbial colonies. The results demonstrated that the technique accurately recorded colony growth and visualized microbial activity in different parts of the colony.
SCIENTIFIC REPORTS
(2023)
Article
Engineering, Geological
YuanHai Li, XiaoJie Tang, HongHu Zhu
Summary: Two algorithmic approaches were proposed for dealing with the difficulties in applying DIC for experimental measurement of geomaterials, focusing on deformation characteristics and achieving optimized results in terms of precision and speed. Through incorporating DIC and the acoustic emission system, uniaxial compression tests on rock-like materials were conducted to investigate the effectiveness of the methods.
Article
Materials Science, Multidisciplinary
P. L. Reu, B. Blaysat, E. Ando, K. Bhattacharya, C. Couture, V. Couty, D. Deb, S. S. Fayad, M. A. Iadicola, S. Jaminion, M. Klein, A. K. Landauer, P. Lava, M. Liu, L. K. Luan, S. N. Olufsen, J. Rethore, E. Roubin, D. T. Seidl, T. Siebert, O. Stamati, E. Toussaint, D. Turner, C. S. R. Vemulapati, T. Weikert, J. F. Witz, O. Witzel, J. Yang
Summary: This paper introduces the background and objectives of DIC Challenge 2.0, discusses the methods and results for evaluating the spatial resolution of 2D-DIC codes. The study finds that the displacement measurement performance of the 2D codes generally meets the expected theoretical performance, but there are significant variations in the calculation of strain spatial resolution. The paper provides a useful framework for understanding and analyzing the performance of DIC software and highlights some unique errors associated with image analysis. Future research can use the provided images for unambiguous comparisons.
EXPERIMENTAL MECHANICS
(2022)
Article
Biochemical Research Methods
Shilpa Tayal, Veena Singh, Tejinder Kaur, Neetu Singh, Dalip Singh Mehta
Summary: A multimodal microscopic system was reported, integrating a high-resolution quantitative phase interferometer and oblique-illumination-based fluorescence imaging system for sub-pixel accuracy in phase imaging and camera saturation avoidance. Highly resolved phase maps were obtained using speckle-free illumination and HR-DFT method, significantly improving accuracy in quantitative parameters extraction for cancer and stem cells.
JOURNAL OF BIOPHOTONICS
(2022)
Article
Mechanics
D. Garoz, M. Hajikazemi, T. D. Dinh, W. Van Paepegem
COMPOSITE STRUCTURES
(2020)
Article
Materials Science, Multidisciplinary
Ang Feng, Simon Michels, Alfredo Lamberti, Wim Van Paepegem, Philippe F. Smet
Article
Engineering, Industrial
Matthias Herthoge, Jens De Pelsmaeker, Matthieu Boone, Ives De Baere, Wim Van Paepegem, Sandra Van Vlierberghe
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2020)
Correction
Acoustics
Filip Zastavnik, Rik Pintelon, Mathias Kersemans, Wim Van Paepegem, Lincy Pyl
JOURNAL OF SOUND AND VIBRATION
(2020)
Article
Energy & Fuels
Gilberto Santo, Mathijs Peeters, Wim Van Paepegem, Joris Degroote
Article
Mechanics
H. Ahmadi, M. Hajikazemi, W. Van Paepegem
COMPOSITE STRUCTURES
(2020)
Article
Materials Science, Composites
Timo Meireman, Lode Daelemans, Sander Rijckaert, Hubert Rahier, Wim Van Paepegem, Karen De Clerck
COMPOSITES SCIENCE AND TECHNOLOGY
(2020)
Article
Acoustics
Joost Segers, Saeid Hedayatrasa, Gaetan Poelman, Wim Van Paepegem, Mathias Kersemans
JOURNAL OF SOUND AND VIBRATION
(2020)
Article
Materials Science, Composites
C. Breite, A. Melnikov, A. Turon, A. B. de Morais, F. Otero, F. Mesquita, J. Costa, J. A. Mayugo, J. M. Guerrero, L. Gorbatikh, L. N. McCartney, M. Hajikazemi, P. P. Camanho, R. P. Tavares, S. Lomov, S. Pimenta, W. Van Paepegem, Y. Swolfs
Summary: This paper presents a blind benchmark of seven different models applied to two virtual materials for prediction of longitudinal tensile failure of unidirectional composites. Capturing the localization of stress concentrations was vital in predicting the effect of matrix stiffness and strength on composite failure strain and strength as well as fiber break and cluster development. The discussions provide insight into how model assumptions are linked to the differences in predictions.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Composites
Lode Daelemans, Olivier Verschatse, Lisa Heirman, Wim Van Paepegem, Karen De Clerck
Summary: The addition of electrospun thermoplastic nanofibers is a viable toughening strategy for designing nanofiber reinforced epoxy materials with excellent toughness, particularly polyamide and polycaprolactone nanofibers can increase the plastic energy uptake up to 100%. The main energy-absorbing mechanism was found to be bridging nanofibers, although a lack of adhesion with the matrix resulted in a decrease in toughening efficiency, especially when oriented parallel with the crack growth direction. The study provides insights for material design in applications requiring high toughness such as adhesives, coatings, and fiber-reinforced composite laminates.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Mechanical
Liangliang Cheng, Vahid Yaghoubi, Wim Van Paepegem, Mathias Kersemans
Summary: Performing non-destructive testing on metallic components with complex geometries, such as turbine blades, is challenging and requires powerful and robust inspection protocols. A MCS classification approach, coupled with optimization of feature selection and decision boundary, has been proposed in this study to discriminate healthy and unhealthy components. An experimental case study demonstrated the high classification accuracy and robustness of the developed MCS approach.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Engineering, Mechanical
T. D. Dinh, S. Han, V. Yaghoubi, H. Xiang, H. Erdelyi, T. Craeghs, J. Segers, W. Van Paepegem
Summary: The article presents a fatigue model that effectively captures the impact of high surface roughness on the fatigue crack initiation of additively manufactured Ti6Al4V alloys in the moderate cycle fatigue regime.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Optics
Saeid Hedayatrasa, Gaetan Poelman, Joost Segers, Wim Van Paepegem, Mathias Kersemans
Summary: Thermal Wave Radar (TWR) imaging utilizes pulse compression to enhance probing depth and resolution in infrared thermographic testing. The novel frequency-phase modulated (FPM) waveform introduced in this paper outperforms existing waveforms in defect detectability and contrast-to-noise ratio, particularly for deeper defects, when inspecting glass and carbon fiber reinforced polymer composites.
OPTICS AND LASERS IN ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Florian Cougnon, Mathias Kersemans, Wim Van Paepegem, Diederik Depla
Summary: Magnetron sputter deposition allows for thin film deposition on heat sensitive materials like fiber-reinforced polymers, with temperature increase kept below 25 degrees C for film thicknesses up to 600 nm. Thicker metal films embedded in composites can negatively affect mechanical integrity, and introducing uncured composites into the vacuum chamber can impact base pressure and film properties. Despite these challenges, the potential to use embedded thin films in various applications is demonstrated.
Article
Polymer Science
Pei Hao, Siebe W. F. Spronk, Ruben D. B. Sevenois, Wim van Paepegem, Francisco A. Gilabert
Summary: The nonlinear behaviour of FRPC in transverse loading is mainly induced by the constituent polymer matrix, which is rate- and temperature-dependent. This paper presents a test setup to provide robust stress-strain measurements for FRPC at high strain rates. The micro- and macroscopic thermomechanical response of CF/PR520 and CF/PEEK systems are analyzed, showing excessive strain localization and discussing the differences between thermoplastic and thermoset matrices.