Article
Mechanics
Yuki Arai, Sei-ichiro Sakata
Summary: This study conducted microscopic strain measurements and numerical analysis on unidirectional glass fiber reinforced plastic under transverse tensile loading. By incorporating the Kriging method and region splitting technique, the accuracy and validity of strain measurement were improved. Both experimental and numerical results showed the feasibility and effectiveness of the proposed approach in analyzing strain fields at the micro-level.
COMPOSITE STRUCTURES
(2021)
Article
Chemistry, Analytical
Dario De Domenico, Antonino Quattrocchi, Damiano Alizzio, Roberto Montanini, Santi Urso, Giuseppe Ricciardi, Antonino Recupero
Summary: The study utilizes Digital Image Correlation (DIC) technology to investigate the interface behavior between externally bonded fabric reinforced cementitious mortar (FRCM) sheets and concrete substrate in civil engineering. By conducting experiments on notched concrete beams reinforced with FRCM sheets and using DIC measurements, the research reveals the mechanical behavior and failure mode of the materials.
Article
Mechanics
Ali Fallah Pour, Rupesh K. Verma, Giang D. Nguyen, Ha H. Bui
Summary: This paper focuses on the transition from diffuse to localized failure of sandstone and concrete specimens under uniaxial compression and the correlation between macro responses and localized deformations at different stages of deformation. The Digital Image Correlation (DIC) technique is used to obtain full-field strain evolution, which enables the identification of bifurcation from homogeneous to localized deformation. The results show different bifurcation characteristics of sandstone, normal strength concrete, and high strength concrete under uniaxial compression. The transition from diffuse to localized failure is found to be gradual even for very brittle behavior with snap-back. Statistical distribution of strain and its evolution during this transition are investigated to provide a lower-scale form of strain distribution and evolution.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Engineering, Civil
Ismail Bello, George Wardeh, Belen Gonzalez-Fonteboa, Fernando Martinez-Abella, Elhem Ghorbel
Summary: Accurately measuring the compressive strengths and stress-strain relationship of brick and mortar is crucial for studying and evaluating masonry structures. A non-contact measuring technique was used in this study to obtain full-scale strain and failure patterns, and investigate the effect of joint mortar composition on masonry behavior.
Article
Chemistry, Multidisciplinary
Yiran Li, Dong Zhao, Xueyi Ma, Jianzhong Zhang, Jian Zhao
Summary: This paper proposes a panoramic displacement field measurement method to accurately measure the shape and panoramic displacement field of objects with complex morphologies. The method is based on the robust subset-based DIC algorithm and Zhang's calibration method, and it reconstructs the 3D shape and estimates the full-field displacements of complex surfaces from multi-view stereo camera pairs. The proposed method also determines the scale factor of the 3D reconstructed surface and stitches multiple 3D reconstructed surfaces using laser point cloud data. The experimental results confirm the accuracy of the proposed method in measuring panoramic shape and full-field displacement of complex objects.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Manufacturing
Masoud Mehrabian, Rachid Boukhili
Summary: This study proposes a digital image correlation (DIC) technique for through-the-thickness deformations of multi-bolted single-lap (SL) shear hybrid bolted/bonded joints made of carbon/epoxy laminates. Real-time monitoring of the strain in the overlap region informs on the location of the failure before the load reaches 50% of its ultimate value. The results showed differences in peel strain, shear strain, and joint rotation between different laminate stacking sequences.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Optics
Xiaofeng Yan, Jinwei Guan, Kang Wei, Rui Zhang, Li Guo
Summary: In this study, a hybrid computational and experimental mechanics method based on peridynamics and DIC technique is proposed for measuring the full-field rigid body rotation and strain. The method utilizes a DIC-based PD model to derive calculation formulas for rigid body rotation and strain, which are mutually insensitive and independent. The proposed method is able to accurately calculate rotation and strain in the presence of simultaneous rigid body rotation and deformation.
OPTICS AND LASERS IN ENGINEERING
(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
Materials Science, Multidisciplinary
Siyuan Fang, Xiaowan Zheng, Gang Zheng, Boyang Zhang, Bicheng Guo, Lianxiang Yang
Summary: In the field of mechanical engineering, the R-value of a material, which characterizes its ability to resist thickness strain, is becoming increasingly important. Conventional methods for determining the R-value rely on experiments and the assumption of constant volume. This paper presents an alternative method that eliminates the need for assumptions by using a multi-camera DIC system to measure strains in three directions simultaneously, improving the accuracy of R-value measurement through the use of the RANSAC algorithm to eliminate noise.
Article
Engineering, Mechanical
Liping Yu, Bing Pan
Summary: A novel time-gated active imaging DIC method based on bandpass filtering and gated single-photon imaging techniques is proposed for high-temperature deformation measurement. This method maintains image quality at high temperatures and shows promising application prospects.
EXTREME MECHANICS LETTERS
(2022)
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
Mechanics
Ali Fallah Pour, Aliakbar Gholampour, Togay Ozbakkaloglu
Summary: This study presents the outcomes of the first experimental study on the strain localization of PVA fiber-reinforced concrete-filled FRP tubes. The influence of fiber type and confinement stiffness on the behavior and strain localization of CFFTs was examined. The results show that the characteristics of strain localization differ depending on the presence of PVA fibers and the level of confinement.
COMPOSITE STRUCTURES
(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
Engineering, Multidisciplinary
Philopateer Boules, Amir Fam, Aikaterini Genikomsou
Summary: This study presents an experimental investigation of bonded connections of FRP pultruded sections for a new floor design. Adhesively bonded connections with or without mechanical fasteners of different types were examined, and the strain and slip profiles along the connection interface were captured using DIC. The study showed that the connections reached a high percentage of the full capacity of the member, and the failure modes included fiber-tear of the ribbed plate and adhesive failure. The use of fasteners with adhesive increased the ultimate capacity, and the embedment of fasteners inside the concrete had little effect on strength. A bond-slip relationship was deduced from the DIC test results.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Engineering, Biomedical
Brooks A. Lane, Ricardo J. Cardoza, Susan M. Lessner, Narendra R. Vyavahare, Michael A. Sutton, John F. Eberth
Summary: In this methodological study, the strain profiles of healthy and elastase-infused mouse aortas were measured using StereoDIC. The results showed significantly reduced circumferential strains in elastase-infused tissues, while shear strains were very small on the tissue's surface. The StereoDIC-based strain detection provided more detailed results compared to conventional edge detection techniques.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Engineering, Civil
Reza Aghlara, Mahmood Md. Tahir
ENGINEERING STRUCTURES
(2018)
Article
Construction & Building Technology
Reza Aghlara, Mahmood Md. Tahir, Azlan Bin Adnan
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2018)
Article
Construction & Building Technology
S. O. Bamaga, M. M. Tahir, C. S. Tan, P. N. Shek, R. Aghlara
CONSTRUCTION AND BUILDING MATERIALS
(2019)
Article
Engineering, Civil
S. O. Bamaga, M. M. Tahir, S. P. Ngian, S. Mohamad, A. Sulaiman, R. Aghlara
LATIN AMERICAN JOURNAL OF SOLIDS AND STRUCTURES
(2019)
Article
Engineering, Multidisciplinary
Reza Aghlara, Mahmood Md. Tahir, A. Adnan
Article
Engineering, Multidisciplinary
Sicheng Jiao, Shixiang Wang, Minge Gao, Min Xu
Summary: This paper presents a non-contact method of thickness measurement for thin-walled rotary shell parts based on a chromatic confocal sensor. The method involves using a flip method to obtain surface profiles from both sides of the workpiece, measuring the decentration and tilt errors of the workpiece using a centering system, establishing a unified reference coordinate system, reconstructing the external and internal surface profiles, and calculating the thickness. Experimental results show that the method can accurately measure the thickness of a sapphire spherical shell workpiece and is consistent with measurements of other materials.
Article
Engineering, Multidisciplinary
Rajeev Kumar, Sajal Agarwal, Sarika Pal, Alka Verma, Yogendra Kumar Prajapati
Summary: This study evaluated the performance of a CaF2-Ag-MXene-based surface plasmon resonance (SPR) sensor at different wavelengths. The results showed that the sensor achieved the maximum sensitivity at a wavelength of 532 nm, and higher sensitivities were obtained at shorter wavelengths at the expense of detection accuracy.
Article
Engineering, Multidisciplinary
Attilio Di Nisio, Gregorio Andria, Francesco Adamo, Daniel Lotano, Filippo Attivissimo
Summary: Capacitive sensing is a widely used technique for a variety of applications, including avionics. However, current industry standard Capacitive Level Sensors (CLSs) used in helicopters perform poorly in terms of sensitivity and dynamic characteristics. In this study, novel geometries were explored and three prototypes were built and tested. Experimental validation showed that the new design featuring a helicoidal slit along the external electrode of the cylindrical probe improved sensitivity, response time, and linearity.
Article
Engineering, Multidisciplinary
Kai Yang, Huiqin Wang, Ke Wang, Fengchen Chen
Summary: This paper proposes an effective measurement method for dynamic compaction construction based on time series model, which enables real-time monitoring and measurement of anomalies and important construction parameters through simulating motion state transformation and running time estimation.
Article
Engineering, Multidisciplinary
Hui Fu, Qinghua Song, Jixiang Gong, Liping Jiang, Zhanqiang Liu, Qiang Luan, Hongsheng Wang
Summary: An automatic detection and pixel-level quantification model based on joint Mask R-CNN and TransUNet is developed to accurately evaluate microcrack damage on the grinding surfaces of engineering ceramics. The model is effectively trained on actual micrograph image dataset using a joint training strategy. The proposed model achieves reliable automatic detection and fine segmentation of microcracks, and a skeleton-based quantification model is also proposed to provide comprehensive and precise measurements of microcrack size.
Review
Engineering, Multidisciplinary
Sang Yeob Kim, Da Yun Kwon, Arum Jang, Young K. Ju, Jong-Sub Lee, Seungkwan Hong
Summary: This paper reviews the categorization and applications of UAV sensors in forensic engineering, with a focus on geotechnical, structural, and water infrastructure fields. It discusses the advantages and disadvantages of sensors with different wavelengths and addresses the challenges of current UAV technology and recommendations for further research in forensic engineering.
Article
Engineering, Multidisciplinary
Anton Nunez-Seoane, Joaquin Martinez-Sanchez, Erik Rua, Pedro Arias
Summary: This article compares the use of Mobile Laser Scanners (MLS) and Aerial Laser Scanners (ALS) for digitizing the road environment and detecting road slopes. The study found that ALS data and its corresponding algorithm achieved better detection and delimitation results compared to MLS. Measuring the road from a terrestrial perspective negatively impacted the detection process, while an aerial perspective allowed for scanning of the entire slope structure.
Article
Engineering, Multidisciplinary
Nur Luqman Saleh, Aduwati Sali, Raja Syamsul Azmir Raja Abdullah, Sharifah M. Syed Ahmad, Jiun Terng Liew, Fazirulhisyam Hashim, Fairuz Abdullah, Nur Emileen Abdul Rashid
Summary: This study introduces an enhanced signal processing scheme for detecting mouth-click signals used by blind individuals. By utilizing additional band-pass filtering and other steps, the detection accuracy is improved. Experimental results using artificial signal data showed a 100% success rate in detecting obstacles. The emerging concepts in this research are expected to benefit radar and sonar system applications.
Article
Engineering, Multidisciplinary
Jiqiang Tang, Shengjie Qiu, Lu Zhang, Jinji Sun, Xinxiu Zhou
Summary: This paper studies the magnetic noise level of a compact high-performance magnetically shielded room (MSR) under different operational conditions and establishes a quantitative model for magnetic noise calculation. Verification experiments show the effectiveness of the proposed method.
Review
Engineering, Multidisciplinary
Krzysztof Bartnik, Marcin Koba, Mateusz Smietana
Summary: The demand for miniaturized sensors in the biomedical industry is increasing, and optical fiber sensors (OFSs) are gaining popularity due to their small size, flexibility, and biocompatibility. This study reviews various OFS designs tested in vivo and identifies future perspectives and challenges for OFS technology development from a user perspective.
Article
Engineering, Multidisciplinary
Yue Wang, Lei Zhou, Zihao Li, Jun Wang, Xuangou Wu, Xiangjun Wang, Lei Hu
Summary: This paper presents a 3-D reconstruction method for dynamic stereo vision of metal surface based on line structured light, overcoming the limitation of the measurement range of static stereo vision. The proposed method uses joint calibration and global optimization to accurately reconstruct the 3-D coordinates of the line structured light fringe, improving the reconstruction accuracy.
Article
Engineering, Multidisciplinary
Jaafar Alsalaet
Summary: Order tracking analysis is an effective tool for machinery fault diagnosis and operational modal analysis. This study presents a new formulation for the data equation of the second-generation Vold-Kalman filter, using separated cosine and sine kernels to minimize error and provide smoother envelopes. The proposed method achieves high accuracy even with small weighting factors.
Article
Engineering, Multidisciplinary
Tonglei Cao, Kechen Song, Likun Xu, Hu Feng, Yunhui Yan, Jingbo Guo
Summary: This study constructs a high-resolution dataset for surface defects in ceramic tiles and addresses the scale and quantity differences in defect distribution. An improved approach is proposed by introducing a content-aware feature recombination method and a dynamic attention mechanism. Experimental results demonstrate the superior accuracy and efficiency of the proposed method.
Article
Engineering, Multidisciplinary
Qinghong Fu, Yunxi Lou, Jianghui Deng, Xin Qiu, Xianhua Chen
Summary: Measurement and quantitative characterization of aging-induced gradient properties is crucial for accurate analysis and design of asphalt pavement. This research proposes the composite specimen method to obtain asphalt binders at different depths within the mixture and uses dynamic shear rheometer tests to measure aging-induced gradient properties and reveal internal mechanisms. G* master curves are constructed to investigate gradient aging effects in a wide range. The study finds that the composite specimen method can effectively restore the boundary conditions and that it is feasible to study gradient aging characteristics within the asphalt mixture. The study also observes variations in G* and delta values and the depth range of gradient aging effects for different aging levels.
Article
Engineering, Multidisciplinary
Min Li, Kai Wei, Tianhe Xu, Yali Shi, Dixing Wang
Summary: Due to the limitations of ground monitoring stations in China for the BDS, the accuracy of BDS Medium Earth Orbit (MEO) satellite orbits can be influenced. To overcome this, low Earth orbit (LEO) satellites can be used as additional monitoring stations. In this study, data from two LEO satellites were collected to improve the precise orbit determination of the BDS. By comparing the results with GPS and BDS-2/3 solutions, it was found that including the LEO satellites significantly improved the accuracy of GPS and BDS-2/3 orbits.