Article
Construction & Building Technology
Shahzad Ashraf, Magdalena Rucka
Summary: The study investigated the fracture evolution of polyolefin fibre-reinforced concrete (PFRC) and steel fibre-reinforced concrete (SFRC) specimens using acoustic emission (AE) and digital image correlation (DIC) techniques. It was found that adding steel fibres significantly improved crack restriction and post-cracking resistance compared to PFRC specimens due to stronger fibre-matrix bonding, effective fibre bridging, and crack-arresting mechanism. The combined AE and DIC techniques were highly effective for early damage detection and ductility performance evaluation in fibre-reinforced concrete structures.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Liyun Yang, Huanzhen Xie, Dongbin Zhang, Fei Zhang, Changyu Lin, Shizheng Fang
Summary: The study found that an appropriate amount of basalt fiber can increase the tensile strength of concrete, reduce the strength of acoustic emission parameters and cumulative events, and improve crack patterns. Additionally, the suitable amount of basalt fiber can also decrease horizontal strain and its standard deviation, further enhancing the crack resistance of concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Civil
A. Thirumalaiselvi, B. S. Sindu, Saptarshi Sasmal
Summary: This study investigates the damage mechanisms of PVA fiber-reinforced concrete using both AE and DIC techniques. The combined use of these techniques has the potential to analyze crack bridging phenomenon, damage progression, and failure mechanism identification.
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
(2022)
Article
Mechanics
Lukasz Pyrzowski, Magdalena Knak, Magdalena Rucka
Summary: This paper presents an experimental study on the failure behavior of sandwich beams subjected to bending. The samples used are sandwich beams made of polyethylene terephthalate foam core and glass fiber-reinforced polymer laminate face sheets. In a series of experiments, the integration of diagnostic techniques with acoustic emission and digital image correlation has been proposed to accurately track the cracking process on the surface as well as in the entire volume of the beam. The research program carried out allowed for the observation of various modes of failure in composite specimens. The results obtained showed that the integration of acoustic and optical diagnostic techniques provided complementary results and can be successfully used for failure monitoring in sandwich beams.
COMPOSITE STRUCTURES
(2023)
Article
Materials Science, Textiles
Massinissa Grabi, Ahmed Chellil, Mohamed Habibi, Luc Laperriere, Hocine Grabi
Summary: In this study, acoustic emission and digital image correlation techniques were used to investigate three different composites reinforced with treated and untreated luffa fibers. The results showed that alkaline treatment improved the mechanical properties of the composites, with a 2% treatment showing the most outstanding improvements. The K-means clustering method identified four types of damage, and the digital image correlation technique provided accurate strain measurements.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Engineering, Civil
Aron Van Driessche, Dimitrios G. Aggelis, Eleni Tsangouri
Summary: The study tested novel thin-wall TRC shells under service loads and tracked damage modes using Acoustic emission (AE) wave parameters. It was found that stronger shell curvature leads to shear damage mode, monitored by early AE signals, while boundary conditions and textiles volume content also affect damage progress. The efficacy of AE inspection was critically assessed considering wave attenuation.
THIN-WALLED STRUCTURES
(2021)
Article
Engineering, Mechanical
Weiyao Guo, Lexin Chen, Liming Yin, Lei Zhang, Dan Lu, Biao Kong, Han Fei
Summary: A study was conducted on the influence of loading rate on the propagation behavior of rock mode-I cracks. A device was developed to simulate directional propagation of rock cracks. Loading tests were performed at different loading rates, and acoustic emission and digital image correlation were used to monitor the crack propagation process and investigate the influence of loading rate on the mechanism. The results showed that as the loading rate increased, the peak load increased, while the crack initiation angle and time decreased.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
Article
Metallurgy & Metallurgical Engineering
Le-xin Chen, Wei-yao Guo, Yu-jing Jiang, Yan Tan, Yue-ying Zhang, Dan Lu, Fei Han
Summary: A crack directional propagation device was used to conduct loading tests on three rock types in order to study the influence of lithology on the directional propagation law of rock type-I cracks. The acoustic emission (AE) and displacement field characteristics during crack directional propagation were analyzed, and the propagation mechanism of type-I cracks was discussed. The results showed different behaviors in load curves and AE evolution for different rock types. The length of the fracture process zone and the stability of crack directional propagation were found to be influenced by the lithology.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2023)
Article
Materials Science, Characterization & Testing
Hafiz Qasim Ali, Cagatay Yilmaz, Mehmet Yildiz
Summary: This study investigates the effect of adhesive materials on the tensile testing process of composites. The results show that there is no significant difference in the ultimate tensile strength of composites tabbed with different adhesives and procedures. However, the first major failure strength is higher in Araldite tabbed specimens. Digital image correlation and acoustic emission analysis are effective methods for monitoring strain distribution and damage progression.
Article
Mechanics
E. Ozaslan, A. Yetgin, B. Acar, M. A. Guler
Summary: This paper focuses on damage mode identification of composite laminates using acoustic emission and digital image correlation methods. The study investigates the effect of different fiber/matrix materials and hole orientations on damage progression and mechanisms, selecting the most effective acoustic emission parameter through correlation and Principal Component Analyses. The findings are successfully verified by digital image correlation measurements.
COMPOSITE STRUCTURES
(2021)
Article
Construction & Building Technology
Xudong Chen, Liangpeng Hu, Zhang Chen, Yingjie Ning, Yuzhu Guo
Summary: This article conducted experiments to study the interface crack propagation and damage characteristics in rock-concrete structures. The results showed significant strain rate effects on peak load and critical displacement, as well as more sufficient and stable damage evolution under low loading rate. The study also found that the splitting damage at the rock-shotcrete interface exhibited phased characteristics, with intensified damage near the peak load indicated by the surge of the AE signal.
STRUCTURAL CONCRETE
(2023)
Article
Mechanics
Raja Muhammad Awais Khan, Shaghayegh Saeidiharzand, Isa Emami Tabrizi, Hafiz Qasim Ali, Mehmet Yildiz
Summary: In this study, a comprehensive experimental approach using multiple structural health monitoring techniques was conducted to elucidate the size effect in twill woven carbon fiber reinforced polymeric composites. It was found that increase in thickness changes the proportion of microdamage related to fiber failures, and a stagnation period in acoustic emission activity was observed before global failure in thick samples. Moreover, the slower damage growth dynamics in thicker laminates compared to thin laminates were highlighted, assisting in understanding the size effect in laminated composites.
COMPOSITE STRUCTURES
(2021)
Article
Chemistry, Physical
Haozhe Chen, Zhushan Shao, Yoshiaki Fujii
Summary: The time-dependent mechanical properties of brittle rock are crucial for the stability of deep rock engineering, especially during excavation. This study conducted a uniaxial creep test with real-time DIC and AE technologies to investigate the behavior of quartz sandstone and granite. The results showed that the lateral strain and lateral ductility of quartz sandstone were sensitive to stress levels, while the saturated quartz sandstone exhibited bearing capacity before volumetric dilation. The moisture softening effect led to a nearly constant Poisson's ratio and a steady creep rate. For granite, both compression and extension occurred, and failure mainly occurred in prominent deformation areas. The AE hits showed a similar time-dependent behavior to the strain of rock, and attenuation occurred before the unsteady phase.
Article
Materials Science, Multidisciplinary
Yue Zhang, Jianfeng Shi, Jinyang Zheng
Summary: The study proposes a method combining acoustic emission and digital image correlation techniques to measure the fracture toughness of polyethylene pipe material, and verifies the effectiveness and accuracy of this method through numerical simulation and experimental testing.
MATERIALS & DESIGN
(2021)
Article
Engineering, Civil
Danying Gao, Dongdong Ji, Zhiqiang Gu, Huanhuan Yan, Yu Zhang
Summary: This research aimed to maximize the utilization of recycled aggregates to produce hybrid fibers reinforced self-compacting concrete suitable for construction applications. The influence of different combinations of recycled coarse aggregate (RCA) and recycled fine aggregate (RFA) replacements on the workability and mechanical properties of hybrid fibers reinforced recycled aggregates self-compacting concrete (HFRA-SCC) were studied. Results showed that the workability and mechanical properties of HFRA-SCC were negatively affected when the replacement ratio of recycled aggregates exceeded 25%. However, the inclusion of fibers compensated for the strength loss caused by recycled aggregates and significantly increased the toughness of the concrete.
Article
Materials Science, Characterization & Testing
Hao Wu, Guoyan Zhao, Pinnaduwa H. S. W. Kulatilake, Weizhang Liang, Enjie Wang
Article
Construction & Building Technology
Hao Wu, Guoyan Zhao, Weizhang Liang, Enjie Wang, Shaowei Ma
ADVANCES IN CIVIL ENGINEERING
(2019)
Article
Computer Science, Interdisciplinary Applications
Hao Wu, Pinnaduwa H. S. W. Kulatilake, Guoyan Zhao, Weizhang Liang, Enjie Wang
COMPUTERS AND GEOTECHNICS
(2019)
Article
Engineering, Mechanical
Hao Wu, Pinnaduwa H. S. W. Kulatilake, Guoyan Zhao, Weizhang Liang
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2019)
Article
Engineering, Mechanical
Hao Wu, Guoyan Zhao, Weizhang Liang
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2020)
Review
Geochemistry & Geophysics
Weizhang Liang, Bing Dai, Guoyan Zhao, Hao Wu
Article
Chemistry, Multidisciplinary
Hao Wu, Bing Dai, Guoyan Zhao, Ying Chen, Yakun Tian
APPLIED SCIENCES-BASEL
(2020)
Article
Mathematics
Weizhang Liang, Suizhi Luo, Guoyan Zhao, Hao Wu
Article
Geosciences, Multidisciplinary
Weizhang Liang, Asli Sari, Guoyan Zhao, Stephen D. McKinnon, Hao Wu
Article
Engineering, Geological
Weizhang Liang, Yuksel Asli Sari, Guoyan Zhao, Stephen D. McKinnon, Hao Wu
Summary: This study proposes five ensemble classifiers to estimate the probability of short-term rockburst risk, which were verified using 91 rockburst samples. The effects of different indicator combinations on prediction results were analyzed, and the proposed ensemble classifiers outperformed individual learners in overall performance, with accuracy-based and F-1-based classifiers being preferred for predicting short-term rockburst risk.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Metallurgy & Metallurgical Engineering
Hao Wu, Bing Dai, Li Cheng, Rong Lu, Guoyan Zhao, Weizhang Liang
Summary: This study investigated the mechanical properties and energy evolution of sandstone samples with and without circular cavities under impact loading tests. The presence of a cavity weakened the dynamic compressive strength and affected crack initiation and rock fragmentation.
MINING METALLURGY & EXPLORATION
(2021)
Article
Geochemistry & Geophysics
Qingliang Chang, Xingjie Yao, Chongliang Yuan, Qiang Leng, Hao Wu
Summary: When the coal seam floor contains a confined aquifer, water inrush disasters are highly likely to occur. The failure behavior of the coal seam floor in the paste filling working face can be assessed through a theoretical model and numerical analysis, with the filling interval and long-term strength of the filling body having significant impacts on the floor failure depth, stress and displacement distributions, and plastic zone.
Article
Engineering, Civil
Hao Wu, Dan Ma, A. J. S. Spearing, Guoyan Zhao
Summary: Understanding the failure phenomena and mechanisms of stress regime on tunnels is critical, as hazardous failure phenomena frequently occur in deep hardrock tunnels. This study systematically investigated the mechanical behavior of rock specimens with different numbers of openings under uniaxial compression, revealing the significant impact of the number of openings on the weakening effect of rock mechanical properties. The crack evolution process in specimens with openings includes tensile cracks, spalling cracks, and shear cracks, and the crack initiation mechanism can be fully explained based on the stress distribution law around the opening.
GEOMECHANICS AND ENGINEERING
(2021)
Article
Computer Science, Information Systems
Shaowei Ma, Zhouquan Luo, Hao Wu, Yaguang Qin
Article
Engineering, Mechanical
Rosaria Del Toro, Maria Laura De Bellis, Marcello Vasta, Andrea Bacigalupo
Summary: This article presents a multifield asymptotic homogenization scheme for analyzing Bloch wave propagation in non-standard thermoelastic periodic materials. The proposed method derives microscale field equations, solves recursive differential problems within the unit cell, establishes a down-scaling relation, and obtains average field equations. The effectiveness of this approach is validated by comparing dispersion curves with those from the Floquet-Bloch theory.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Yue Bao, Zhengcheng Yao, Yue Zhang, Xueman Hu, Xiandong Liu, Yingchun Shan, Tian He
Summary: This paper proposes a novel triple-gradient phononic acoustic black hole (ABH) beam that strategically manipulates multiple gradients to enhance its performance. The study reveals that the ABH effect is not solely brought about by the thickness gradient, but also extends to the power-law gradients in density and modulus. The synergistic development of three different gradient effects leads to more pronounced and broader bandgaps in PCs.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Matthias Ryser, Jason Steffen, Bekim Berisha, Markus Bambach
Summary: This study investigates the feasibility of replacing complex experiments with multiple simpler ones to determine the anisotropic yielding behavior of sheet metal. The results show that parameter identifiability and accuracy can be achieved by combining multiple specimen geometries and orientations, enhancing the understanding of the yield behavior.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Wenjun Li, Pengfei Zhang, Siyong Yang, Shenling Cai, Kai Feng
Summary: This study presents a novel two-dimensional non-contact platform based on Near-field Acoustic Levitation (NFAL), which can realize both one-dimensional and two-dimensional transportation. Numerical and experimental results prove the feasibility and ease of this method.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Shuo Liu, Lu Che, Guodong Fang, Jun Liang
Summary: This study presents a novel lamina conjugated bond-based peridynamic (BB-PD) model that overcomes the limitations of material properties and is applicable to composite laminates with different stacking sequences. The accuracy and applicability of the model are validated through simulations of elastic deformation and progressive damage behavior, providing an explanation of the damage modes and failure mechanisms of laminated composite materials subjected to uniaxial loading.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Omar El-Khatib, S. Kumar, Wesley J. Cantwell, Andreas Schiffer
Summary: Sandwich-structured honeycombs (SSHCs) are hierarchical structures with enhanced mass-specific properties. A model capable of predicting the elastic properties of hexagonal SSHCs is presented, showing superior in-plane elastic and shear moduli compared to traditional honeycombs, while the out-of-plane shear moduli are reduced.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Zhi-Jian Li, Hong-Liang Dai, Yuan Yao, Jing-Ling Liu
Summary: This paper proposes a process-performance prediction model for estimating the yield strength and ultimate tensile strength of metallic parts fabricated by powder bed fusion additive manufacturing. The effect of main process variables on the mechanical performance of printed metallic parts is analyzed and the results can serve as a guideline for improvement. The accuracy of the proposed model is validated by comparison with literature.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Saman A. Bapir, Kawa M. A. Manmi, Rostam K. Saeed, Abdolrahman Dadvand
Summary: This study numerically investigates the behavior of an ultrasonically driven gas bubble between two parallel rigid circular walls with a cylindrical micro-indentation in one wall. The primary objective is to determine the conditions that facilitate the removal of particulate contamination from the indentation using the bubble jet. The study found that the bubble jet can effectively remove contamination from the indentation for certain ranges of indentation diameter, but becomes less effective for larger indentation diameters.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
E. Polyzos, E. Vereroudakis, S. Malefaki, D. Vlassopoulos, D. Van Hemelrijck, L. Pyl
Summary: This research investigates the elastic and damage characteristics of individual composite beads used in 3D printed composites. A new analytical probabilistic progressive damage model (PPDM) is introduced to capture the elastic and damage attributes of these beads. Experimental results show strong agreement with the model in terms of elastic behavior and ultimate strength and strain.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
