Article
Mechanics
Zhanqi Cheng, Yuyang Hu, Liusheng Chu, Chengfang Yuan, Hu Feng
Summary: This paper establishes a semi-discrete model for ECC based on peridynamics to study the cracking process, modifies the pairwise force function by improving the damage coefficient to solve the cracking difficulty; models the interactions between fiber and matrix, analyzes convergence, and validates the model's effectiveness; finally, studies the effects of pre-crack position and fiber volume fraction on dynamic fracture propagation.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Mechanics
Sihai Bao, Yafang Zhang, Hao Liu, Yanfei Niu, Weijian Zhang, Ke Zeng
Summary: This study focuses on the damage process and crack propagation of functionally graded ultra-high-performance cementitious composite (FGUHPCC) with different layers and fiber types. The results show that the functionally graded design improves the flexural strength and deflection capacity compared to single layer design. FGUHPCC with three layers and mixed steel and PVA fibers exhibit the best flexural behavior. The crack opening displacement (COD) profile of the functionally graded design is mutable and nonlinear, with the lowest maximum crack propagation speed and largest crack area ratios compared to other specimens.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Mechanics
Xinxin Li, Yi Xu
Summary: This study investigates crack propagation in concrete at the mesoscopic level using a phase field modeling approach with a mesostructure of concrete composite. The results show that mesostructural configurations play a significant role in determining the crack pattern of concrete.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Construction & Building Technology
Furong Gao, Yongsheng Ji, Linglei Zhang, Zhongzhe Zhang, Qi Xue
Summary: The phase change cementitious material (PCCM) prepared in the laboratory exhibits better high temperature resistance than ordinary Portland cement by filling pores and cracks to improve microstructure.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Multidisciplinary
Darui Ren, Xiaoli Liu, Baoqing Cui, Enzhi Wang, Qing Ma, Fayuan Yan, Weiqiang Xie
Summary: A wings-crack based model was proposed to simulate the stress-strain relationship of concrete under compression by considering the influence of coarse aggregate and cement mortar. The model successfully reproduced the effects of coarse aggregate gradation, content, and water-to-cement ratio on the stress-strain relationship, and showed good agreement with experimental results. The crack evolution process was also studied, and similar trends were observed compared to experimental observations.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Aliaksandra Tsitova, Fabien Bernachy-Barbe, Benoit Bary, Francois Hild
Summary: This study investigated the creep damage of concrete using experimental and numerical methods. Compressive creep tests were conducted on cement paste and mortar to analyze the influence of material heterogeneity and stress level on creep rate. The obtained data were used to calibrate a creep constitutive model and predict the creep damage interactions.
MECHANICS OF MATERIALS
(2023)
Article
Construction & Building Technology
Sihai Bao, Yafang Zhang, Hao Liu, Ke Zeng, Weijian Zhang
Summary: This research aims to investigate and optimize the flexural behavior of functionally graded ultra-high performance cementitious composite (FGUHPCC) and optimize its design using numerical simulation. The results indicate that the functionally graded design can improve the flexural capacity and fracture toughness of the material.
STRUCTURAL CONCRETE
(2023)
Article
Mechanics
Darith-Anthony Hun, Julien Yvonnet, Johann Guilleminot, Abdelali Dadda, Anh-Minh Tang, Michel Bornert
Summary: Experimental results and a corresponding numerical model for cracking of heterogeneous clay samples during desiccation are reported and compared in this study. Digital image correlation is used to monitor crack paths and local strain fields during the desiccation process. A qualitative agreement is found for crack paths, but discrepancies remain for local strain fields between the experimental and numerical results. Discussions regarding the comparison between experimental results and the model are provided.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Energy & Fuels
Muhammad Zeeshan Haider, Xinghan Jin, Jong Wan Hu
Summary: In this study, a nanoengineered thermal-energy storing cementitious composite was developed by incorporating micro-encapsulated phase change material (m-PCM) and a combination of multi-walled carbon nanotubes (MWCNTs) and silica fume (SF) for energy-saving purposes. The addition of m-PCM led to a decrease in mechanical strength, but the addition of SF/MWCNTs significantly enhanced the compressive strength of m-PCM mortars. The thermal-cycling test results showed that the energy requirement for thermal regulation in m-PCM mortars with MWCNTs was reduced by approximately 60% compared to the control specimen.
Article
Mechanics
Q. Q. Zhou, Y. G. Wei, Y. C. Zhou, L. Yang
Summary: This paper proposes a cohesive phase-field model based on a diffused interface to handle interface failure in heterogeneous materials. The approach is flexible, can capture crack nucleation, and is insensitive to the width of the diffused interface.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Construction & Building Technology
Yazhao Li, Junxia Li, En-Hua Yang, Xinchun Guan
Summary: The study found that crack path in normal strength RS-ECC is more tortuous, while high strength RS-ECC cracks are more likely to penetrate through RS, resulting in more saturated multiple cracking and improved tensile strain capacity.
CEMENT & CONCRETE COMPOSITES
(2022)
Article
Engineering, Multidisciplinary
Songbin Zhang, Hailong Qin, Zhuang Li, Chong Wei, Cheng Zhang, Xiaoqiang Li
Summary: The damage process and mechanism of Mo-SiCf/SiC cladding is revealed, showing that micro-cracks originate from pores in the outermost side of the SiCf/SiC layer and propagate along fiber bundles boundaries. Bamboo joint-like damage occurs in the SiCf/SiC layer during C-ring test due to periodic pore distribution. Mo-SiCf/SiC cladding exhibits better crack growth resistance and higher strength compared to SiCf/SiC cladding.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Donggeun Park, Jaemin Lee, Kundo Park, Seunghwa Ryu
Summary: This study introduces a powerful tool called the hierarchical generative network (HGNet) for exploring novel materials using deep learning. By training three customized convolutional neural networks, this method accurately predicts complex stress distributions and fracture patterns, and discovers superior designs in vast design spaces using genetic algorithms.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Mechanics
Wenqiang Xu, Hanzhang Li, Yu Li, Teng Wang, Shenghua Lu, Sheng Qiang, Xia Hua
Summary: In this paper, a novel adaptive refinement strategy and virtual crack insertion technique for phase-field models are proposed. These techniques have been proven to enhance efficiency in calculation and are applicable for fracture problems, as demonstrated by numerical experiments.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Construction & Building Technology
Geetika Mishra, Panagiotis A. Danoglidis, Surendra P. Shah, Maria S. Konsta-Gdoutos
Summary: The use of carbon-negative materials, such as biochar, in concrete manufacturing shows promise in nullifying the net embodied greenhouse gas emissions of civil infrastructure. Experimental findings suggest that adding 1% biochar slightly improves hydration and mechanical properties, while combining it with mineral additives significantly enhances performance. The combination of biochar and fly ash increases the CO2 capture capacity of the mix by 92%.
CEMENT & CONCRETE COMPOSITES
(2023)
Article
Engineering, Multidisciplinary
Xiang Li, Shaowu Ning, Zhanli Liu, Ziming Yan, Chengcheng Luo, Zhuo Zhuang
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2020)
Article
Engineering, Mechanical
Shaowu Ning, Fengyuan Yang, Chengcheng Luo, Zhanli Liu, Zhuo Zhuang
EXTREME MECHANICS LETTERS
(2020)
Article
Engineering, Mechanical
Chengcheng Luo, Shaowu Ning, Zhanli Liu, Zhuo Zhuang
EXTREME MECHANICS LETTERS
(2020)
Article
Computer Science, Interdisciplinary Applications
Haolong Chen, Zhibo Du, Xiang Li, Huanlin Zhou, Zhanli Liu
ENGINEERING COMPUTATIONS
(2020)
Article
Mechanics
T. Wang, Z. L. Liu, Y. N. Cui, X. Ye, X. M. Liu, R. Tian, Z. Zhuang
ENGINEERING FRACTURE MECHANICS
(2020)
Article
Computer Science, Interdisciplinary Applications
Chengcheng Luo, Shaowu Ning, Zhanli Liu, Xiang Li, Zhuo Zhuang
Summary: This study proposes a design method for attenuating stress waves pressure using soft matrix embedded with particles. It discusses the relationship between the center frequency and width of the bandgap and the geometric and physical parameters of particle core, and explains the trend of influence by a spring oscillator model. Increasing the radius of hard core could effectively enhance the bandgap width for enhancing the effect of stress wave attenuation.
ENGINEERING COMPUTATIONS
(2021)
Article
Computer Science, Interdisciplinary Applications
Kaili Yao, Dongyang Chu, Ting Li, Zhanli Liu, Bao-Hua Guo, Jun Xu, Zhuo Zhuang
Summary: This paper calculates the Hugoniot relations of polyurea and investigates the energy dissipation mechanism under high-speed shock through molecular dynamics simulations. The findings reveal the unique energy dissipation characteristics of polyurea with different hard segment contents, providing insights for material design and performance evaluation.
ENGINEERING COMPUTATIONS
(2021)
Article
Mechanics
T. Wang, Z. L. Liu, Y. N. Cui, X. Ye, X. M. Liu, R. Tian, Z. Zhuang
ENGINEERING FRACTURE MECHANICS
(2020)
Article
Mechanics
Longkun Lu, Zhanli Liu, Tao Wang, Zhuo Zhuang
ENGINEERING FRACTURE MECHANICS
(2020)
Article
Mechanics
Shaowu Ning, Chengcheng Luo, Fengyuan Yang, Zhanli Liu, Zhuo Zhuang
JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME
(2020)
Article
Computer Science, Interdisciplinary Applications
Jun-Bo Cheng, Li Liu, Song Jiang, Ming Yu, Zhanli Liu
JOURNAL OF COMPUTATIONAL PHYSICS
(2020)
Article
Mechanics
Yue Gao, Emmanuel Detournay
Summary: Experimental evidence shows that the measured toughness increases with confining stress. However, interpreting the observed breakdown pressure relies on assuming uniform fluid pressure in the cracks and identifying the peak pressure with fracture initiation pressure. The model challenges these assumptions by considering fluid lag and hydraulic compliance, indicating that the actual toughness may be overestimated when the breakdown pressure is used to interpret it.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Mechanics
Yue Gao, Emmanuel Detournay
Summary: This paper describes a two-dimensional model of a hydraulic fracture propagating in a weakly consolidated, highly permeable reservoir rock during a waterflooding operation. The model highlights essential differences from conventional hydraulic fracturing treatments of oil and gas wells and reveals the non-monotonic evolution of injection pressure over time. Poroelasticity significantly affects the response of the system, increasing injection pressure and delaying the time at which the peak pressure occurs.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Engineering, Mechanical
Shanglin Yang, Ziming Yan, Yue Gao, Yizhi Zhang, Yigang Wang, Zhanli Liu
Summary: This study computationally and theoretically investigates the bulging deformation of UHMWPE laminates and establishes an orthotropic elastic-plastic damage model. The results show that the apex displacement increases linearly with the impact velocity but decreases nonlinearly with the thickness, while the traveling hinge moves at a constant speed independent of the thickness and impact velocity. Based on these findings, an analytical model is proposed to predict the bulging deformation and its dependence on mass, impact velocity, and thickness.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Shizhe Feng, Ke Cao, Yue Gao, Ying Han, Zhanli Liu, Yang Lu, Zhiping Xu
Summary: This study investigates the anisotropy in fracture toughness of graphene and reveals weak anisotropy between armchair and zigzag directions using in-situ mechanical testing. In-situ tensile tests are carried out to observe the fracture process of graphene, and it is found that embryo cracks nucleated from the graphene edges deflect into major cracks with local kinking features. Extended finite element analysis with the maximum energy release rate criterion is used to model the fracture process, and a weak degree of anisotropy in the fracture toughness is determined.
COMMUNICATIONS MATERIALS
(2022)