Article
Thermodynamics
Haizhou Liu, Lingtao Mao, Yang Ju, Francois Hild
Summary: In order to investigate the damage development of coal under different loading conditions, in-situ tests in uniaxial and triaxial compression were conducted. Advanced digital volume correlation based on finite element discretization was used to quantify the three-dimensional initial and newborn fractures. The experiments revealed that the damage growth in coal was substantially affected by randomly distributed initial defects, and prior to a macroscopic failure, the coal samples generally experienced pre-existing fracture closure, newborn fracture initiation, interaction and propagation of the two fracture types. The study aimed to gain in-depth insights into the bulk fracture of coal and provide quantitative evidence for further understanding the damage mechanisms from the microscale to the macroscale.
Article
Construction & Building Technology
Shuxian Hong, Jianwu Weng, Shaocheng Peng, Jianchao Zhang, Biqin Dong
Summary: This study proposes a method to visualize the debonding areas of new-to-old mortars based on in-situ XCT and DVC. The results show that the debonding areas exhibit larger deformation and strain values during compression and shear testing.
CEMENT & CONCRETE COMPOSITES
(2022)
Article
Materials Science, Composites
Mahoor Mehdikhani, Christian Breite, Yentl Swolfs, Jeroen Soete, Martine Wevers, Stepan V. Lomov, Larissa Gorbatikh
Summary: This study explores the potential of Digital Volume Correlation (DVC) in detecting and characterizing damage in fiber-reinforced composites using in-situ X-ray Computed Tomography. Through preliminary analysis of digital deformation images and real-deformation images acquired during in-situ tensile loading, DVC proves to be a promising tool for quantification of deformation and damage at both mesoscale and microscale levels. Damage mechanisms in fiber-reinforced composites are successfully detected and characterized using DVC, showing the limitations of traditional methods like grayscale thresholding.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Wudi Li, Yingjie Jian, Xingui Zhou, Honglei Wang
Summary: The failure mechanisms of carbon fiber reinforced carbon matrix (C/C) composites, widely used in aerospace applications for their excellent performance, have been extensively studied. In situ X-ray computed tomography has been employed to investigate changes in failure processes. Tensile loads were applied to 3D fine-woven punctured and needle-punched C/C composites, and digital volume correlation was used to assess the laboratory X-ray computed tomographs. Pore assimilation and crack evolution from micro-pores were observed in C/C composites, with different failure behaviors in fine-woven punctured and needle-punched C/C composites attributed to the different preform structures. Weakening of C/C composites at punctured or needle-punched sites was also observed.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Composites
E. Schoberl, C. Breite, S. Rosini, Y. Swolfs, M. N. Mavrogordato, I Sinclair, S. M. Spearing
Summary: This paper presents the development of novel Carbon-Fibre Reinforced Polymer (CFRP) laminates tailored for the application of Digital Volume Correlation (DVC) and Computed Tomography (CT) to experimental mechanics analyses of these materials, demonstrating their suitability as a model system for mechanistic investigations through comparisons of tensile behaviors and in situ Synchrotron Radiation Computed Tomography (SRCT) applications.
JOURNAL OF COMPOSITE MATERIALS
(2021)
Article
Engineering, Multidisciplinary
Lingtao Mao, Yu Lei, Leilei Ding, Jingcheng Wu, Liyun Li, Min Yang, Yang Ju, Fu-pen Chiang
Summary: This study investigates the 3D interior deformation of siltstone specimens using a series of uniaxial compression tests combined with in situ X-ray computed tomography. The specimens had pre-existing 3D surface flaws with different inclination angles and a flaw depth to specimen thickness ratio of 0.26. Digital volumetric speckle photography was used to quantify the 3D interior deformation and determine the distribution of displacement and major principal strain in different sections. The findings reveal the propagation mechanism of a single 3D surface flaw.
Article
Engineering, Multidisciplinary
Cristofaro S. Timpano, Garrett W. Melenka
Summary: This study introduces a methodology for obtaining optimal DVC image datasets for composite materials by adding contrast particles to an epoxy resin. The 25 μm copper particles were found to provide the greatest accuracy. Comparison between downsampled ?-CT and full-resolution datasets demonstrated processing strategies for DVC analysis.
COMPOSITES PART B-ENGINEERING
(2021)
Review
Mechanics
John Holmes, Silvano Sommacal, Raj Das, Zbigniew Stachurski, Paul Compston
Summary: Digital image and volume correlation (DIC and DVC) are used to measure the deformation and damage behavior of composite materials. The heterogeneous nature of the composite microstructure results in complex local behavior that cannot be captured using traditional techniques. DIC and DVC offer significant advantages in monitoring this behavior for fiber-reinforced composite materials. The careful consideration of testing setup and approach is crucial for achieving accurate results.
COMPOSITE STRUCTURES
(2023)
Article
Endocrinology & Metabolism
Chengqiang Zhou, Shaolong Huang, Yifeng Liao, Han Chen, Yazhong Zhang, Hua Li, Ziqiang Zhu, Yunqing Wang
Summary: This study investigates the correlation between the larger side bone cement volume/vertebral body volume ratio (LSBCV/VBV%) and adjacent vertebral compression fracture (AVCF) in percutaneous vertebroplasty (PVP) for osteoporotic vertebral compression fracture (OVCF). The results show that bone mineral density (BMD), bone cement disc leakage, and LSBCV/VBV% are independent risk factors for AVCF after PVP.
FRONTIERS IN ENDOCRINOLOGY
(2023)
Article
Engineering, Manufacturing
Marc-Antoine de Pastre, Yann Quinsat
Summary: This study proposes a virtual volume correlation (V2C) methodology for extracting geometrical and dimensional defects of laser powder bed fusion lattice structures. The V2C method is validated on generated volumes with known defects and proves its ability to accurately relocate these introduced defects. The method is then applied to manufactured lattice structures with different positions and orientations, revealing the influence of strut typology and the building chamber on geometrical and dimensional defects.
ADDITIVE MANUFACTURING
(2023)
Article
Engineering, Biomedical
Aikaterina Karali, Alexander P. Kao, Jurgita Zekonyte, Gordon Blunn, Gianluca Tozzi
Summary: The relationship between microstructure and mechanics of cortical bone during plastic deformation is unclear, and this study provides an in-depth evaluation of the interplay between plastic strain building up and changes in the canal network for cortical bone tissue. The research reveals that regions adjacent to the imprint undergo tensile strain, while the volume underneath experiences compressive strain, with canal loss and disruption occurring in regions of higher compressive strains exceeding -20000 mu epsilon.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
J. Paul Forna-Kreutzer, Jon Ell, Harold Barnard, Talha J. Pirzada, Robert O. Ritchie, Dong Liu
Summary: In this study, the failure mechanisms of two Nextel 720/alumina oxide-oxide ceramic-matrix composites at different temperatures were investigated using in situ synchrotron X-ray computed micro-tomography and digital volume correlation. Differences in bending strengths, damage modes, and fracture characteristics between the two materials were observed. The use of high-temperature tomography/DVC was proven to be effective in studying the deformation and fracture of oxide-oxide CMCs.
MATERIALS & DESIGN
(2021)
Article
Mechanics
Abhinav Goyal, Garrett W. Melenka
Summary: Hybrid braided composites combine multiple reinforcing fibres in a matrix. This study aims to understand the internal strain behavior of hybrid braided composites using Digital Volume Correlation (DVC) technique. DVC allows for the generation of three-dimensional displacement and strain fields.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Geological
H. L. Shi, T. Rougelot, S. Y. Xie, J. F. Shao, J. Talandier
Summary: The objective of this study is to investigate the deformation behavior of anisotropic claystone in relation to material heterogeneity. Five triaxial compression tests were conducted on Callovo-Oxfordian claystone samples under in-situ X-ray micro-tomography monitoring. Complete 3D images of the samples' full loading history were analyzed, and non-uniform strain fields were determined. The study focused on the effects of bedding planes, initial cracks, and confining stress on strain fields, and found that the structural anisotropy and confining pressure have a strong influence on strain distribution and cracking process.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2023)
Article
Materials Science, Composites
Cristofaro S. Timpano, Garrett W. Melenka
Summary: Fused filament fabrication (FFF) has been increasingly used in industrial fields as a method of rapid manufacturing, with the addition of reinforcing materials to improve mechanical properties posing challenges in characterization. A study aimed to develop a method to measure and analyze the mechanical properties of FFF produced materials, which exhibit anisotropic mechanical properties due to the complex internal structure and the added reinforcing phase. The study utilized micro-computed tomography and digital volume correlation (DVC) software to analyze strain fields and internal features of the FFF parts under uniaxial tensile load.
JOURNAL OF COMPOSITE MATERIALS
(2021)
Article
Construction & Building Technology
Shuxian Hong, Peng Liu, Jianchao Zhang, Chuan Kuang, Biqin Dong, Qiling Luo, Wei Liu
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Construction & Building Technology
Shuxian Hong, Chuan Kuang, Jianchao Zhang, Dongshuai Hou, Jinrui Zhang, Laibao Liu, Biqin Dong
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Construction & Building Technology
Shuxian Hong, Chuan Kuang, Jianchao Zhang, Biqin Dong
Summary: This paper proposes a sophisticated image processing method to accurately detect microcracks in XCT images, and a reconnecting algorithm to enhance the continuity and integrality of microcracks in concrete fracture XCT images. The analysis of XCT images of fractured rubber concrete samples verifies the method's ability to visualize and quantitatively analyze fracture patterns, demonstrating its robustness.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2022)
Article
Construction & Building Technology
Guangqi Xiong, Yuanliang Ren, Chong Wang, Zhirui Zhang, Shuai Zhou, Chuan Kuang, Ying Zhao, Bumin Guo, Shuxian Hong
Summary: A novel power ultrasound-assisted mixing technology was developed to optimize the dispersion of graphene oxide in cement paste. The results showed that the application of power ultrasound improved the bonding ability between graphene oxide and Ca2+ and -COO- groups, leading to significant improvements in flexural and compressive strength of the cement paste.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Chuan Kuang, Jianwu Weng, Feng Xing, Biqin Dong, Xianfeng Wang, Shuxian Hong
Summary: This study proposed a novel method to evaluate the healing performance of composite materials. By utilizing in-situ XCT and DVC, it distinguished between mechanically healed cracks and unhealed cracks, and visualized the self-healing results based on volumetric strain calculation.
CEMENT & CONCRETE COMPOSITES
(2023)
Article
Materials Science, Multidisciplinary
Xingchang Tang, Chuan Kuang, Weilian Zhou, Kexuan Chen, Jiankang Huang, Xiaoquan Yv, Canglong Wang, Peiqing La
Summary: In order to enhance the mechanical and electrical conductivity of Ti micro alloyed steel, the effects of annealing temperature and time on the properties were investigated. The microstructure evolution and precipitation behavior of Ti(C,N) particles in the ferrite phase were studied. The results showed that annealing at 630 degrees C for 2 h led to the most excellent comprehensive properties, with tensile strength, yield strength, elongation, and conductivity reaching 522 MPa, 414 MPa, 30%, and 13.86%IACS, respectively. The mechanism behind this is the promotion of precipitation of C and N elements by Ti atoms during annealing, which prevents migration of some dislocations, ensures mechanical properties, and improves electrical conductivity.
MATERIALS CHARACTERIZATION
(2023)
Article
Construction & Building Technology
Diego J. De Souza, Leandro F. M. Sanchez, Juarez Hoppe Filho, Marcelo H. F. Medeiros
Summary: This paper evaluates the physical and chemical properties of mortar mixtures with different binders and exposed to different sulphate solutions. A theoretical approach to describe the susceptibility of cementitious mixtures against sulphate attack is proposed. The results show that the amount of portlandite and the potential of ettringite formation are well correlated with the expansion and damage caused by sulphate attack.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Yu Chen, Hossein Rahmani, Erik Schlangen, Og uzhan Copurog
Summary: This study presents a method to accelerate the production of limestone-calcined clay-based cementitious materials using Ca(NO3)2 solution in 3D printing, and investigates the effects of adding Ca(NO3)2 solution on the material's properties. The results show that adding Ca(NO3)2 solution can improve buildability, accelerate initial setting, and increase compressive strength.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Jing Xu, Xianzhi Wang, Wu Yao, Qing Chen, Hehua Zhu, Surendra P. Shah
Summary: Concrete cracks in marine engineering are caused by the hostile seawater environment, leading to serious deterioration of infrastructures. Microbial induced carbonate precipitation (MICP) is an effective and environmentally friendly approach for self-healing of concrete cracks. However, the formation and structure of MICP products for crack healing in seawater are still unclear, which hinders the application of MICP in marine structures.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Zhenbo Wang, Peng Sun, Yurun Fan, Yudong Han, Yudong Hu
Summary: This study investigates the potential use of engineered cementitious composites (ECCs) with strain-hardening and self-healing characteristics as a cover material in wet coral sand exposure. The results show that ECCs can effectively close cracks, reduce water permeability, and restore the load-carrying capacity of structures. Additionally, lower strain levels are associated with decreased rebar corrosion.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Zhengxian Yang, Xiaoli Xiong, Kang Li, Bruno Briseghella, Giuseppe Carlo Marano, Shanghong Chen
Summary: This study investigates the long-term volume stability and strength development of engineered cementitious composites (ECC) containing high-volume steel slag (SS). It is found that the strength of ECC with SS starts to decline after 90 days, while the decline is more significant compared to the matrix. The expansion of SS reduces the fracture toughness of the matrix, leading to an increase in toughness and ductility of the ECC. The introduction of ground granulated blast furnace slag (GGBFS) and PVA fibers can reduce the volume expansion and strength loss caused by SS expansion.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Bin Xi, Zhewen Huang, Salam Al-Obaidi, Liberato Ferrara
Summary: This study investigates the self-healing capabilities of Ultra-High Performance Concrete (UHPC) under the combined influence of mechanical and environmental factors. The results reveal that UHPC with narrow cracks exhibits a higher degree of self-healing, especially when exposed to tap water. Furthermore, prolonged exposure mitigates the inhibitory effect of aggressive ions on self-healing.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Zhichao Xu, Huayang Sun, Yanlin Huo, Minjie Jia, Zhitao Chen, Yingzi Yang
Summary: In this study, MXene was used to modify the surface of polyethylene fiber, improving the interfacial properties and tensile properties of strain hardening cementitious composites. The MXene-coated fiber showed increased tensile stress and strain, reduced crack width and spacing, and enhanced frictional bond strength between the fiber and matrix.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Bao Lu, Yeqiang Zhou, Lei Jiang, Zhensen Liu, Guihua Hou
Summary: This study investigated the leaching rate of Ca2+ from magnesium slag (MS) and developed a leaching-carbonation method to convert MS into high-purity vaterite and supplementary cementitious materials. The wet carbonation process with glycine as a crystal modifier successfully produced spherical vaterite with high purity and surface area. The leachate solid residue (LSR) obtained from the leaching process of MS showed a smaller size destruction and higher surface area compared to Portland cement, leading to accelerated hydration process and improved compressive strength and pore structure development. This work provides a novel treatment method for MS and enables its high value-added utilization.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Gustavo Henrique Nalon, Jose Carlos Lopes Ribeiro, Leonardo Goncalves Pedroti, Roberto Marcio da Silva, Eduardo Nery Duarte de Araujo, Gustavo Emilio Soares de Lima
Summary: The mechanical behavior of mortar joints is crucial for masonry's structural performance. This study investigated the effects of different lime/cement ratios and carbon black nanoparticles content on the properties of mortars. The results showed that increasing lime content decreased mortar strength but increased self-sensing properties at the end of the percolation zone.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Yifei Wang, Lei Lei, Caijun Shi
Summary: The effects of DEIPA and EDIPA at dosages of 0.02% and 0.05% on the hydration and strength development of cement-fly ash-limestone ternary blend were investigated. It was found that both dosages of DEIPA and EDIPA promote the chemical effect of limestone and the hydration of aluminates from cement and fly ash. The hydration of silicates was accelerated by 0.02% of DEIPA or EDIPA but delayed by 0.05% due to excessive aluminates hydration. DEIPA and EDIPA also refine the pore structure and increase compressive strength of the blend mortar.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Du Pan, Ditao Niu, Zongjin Li
Summary: A thick-walled cylinder model was developed in this study to analyze the cracking behavior of seawater sea-sand concrete (SSC) cover. Damage variables were introduced to determine the extent of damage for each cracked ring, and a predictive model for the cracking time of SSC cover was established. The accuracy of the model was verified using the Digital Image Correlation (DIC) technique.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Jiangyu Wu, Hong S. Wong, Hao Zhang, Qian Yin, Hongwen Jing, Dan Ma
Summary: This study explores a method of strengthening cemented rockfill by using well-graded gangue and partially replacing Portland cement with fly ash and a premixed low-alkalinity activator. The research investigated the effects of activator dosage and curing time on the mechanical properties, composition, and microstructure of cemented rockfill. Results show improved performance with low cement content and the use of a low-cost activator. The addition of premixed activator to fly ash enhanced the formation of specific minerals and caused densification of the microstructure. The study reveals an effective and low-cost method for recycling mining wastes and reducing cement.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Juntao Dang, Xiaosong Tang, Jianzhuang Xiao, Aihong Han
Summary: This study proposes a solution to improve the fresh stability and thermal insulation of alkali-activated foamed concrete by adding recycled brick powder. The study investigates the effects of activator modulus and Na2O concentration on the properties of alkali-activated foamed concrete with different bases. The presence of alkaline activator negatively affects the foamability and foam stability, but adjusting the activator concentration can achieve shorter initial setting time and higher fluidity loss. In addition, the increased activator concentration resulted in changes in the pore structure of the foamed concrete.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Jiandong Zuo, Bo Wu, Biqin Dong, Feng Xing, Jun Ma, Guanqi Wei
Summary: Nitrite ion intercalated Ca-Al and Mg-Al layered double hydroxides (LDHs) were successfully synthesized using two modified methods. The Ca-Al LDH synthesized by hydrothermal method (H-C-LDH) exhibited the best properties. The intercalated LDHs improved the mechanical properties, chloride penetration resistance, and permeability resistance of cement mortars without affecting the fluidity. Additionally, the intercalated LDHs provided better corrosion resistance.
CEMENT & CONCRETE COMPOSITES
(2024)
Review
Construction & Building Technology
Jingbin Yang, Zhenping Sun, Nele De Belie, Didier Snoeck
Summary: This review paper provides an overview of internal curing mechanism, common internal curing agents, and the most promising agent-superabsorbent polymers in alkali-activated materials (AAM) systems. The introduction of voids by internal curing agents typically has a negative impact on mechanical properties, but continuous water release during internal curing counteracts this effect by promoting hydration. While the effect of internal curing in reducing autogenous shrinkage of AAM systems has been well-established, the impact on drying shrinkage varies widely in different studies.
CEMENT & CONCRETE COMPOSITES
(2024)
