Article
Mechanics
Xiang Ou, Xiaohu Yao, Fei Han
Summary: Current techniques for simulating dynamic crack propagation are complex and computationally expensive. This study proposes an adaptive coupling model between peridynamics and classical continuum mechanics to simulate dynamic crack propagation and branching. The adaptive coupling model combines the peridynamic model with the local model based on continuum mechanics, establishing a hybrid local/nonlocal model system. The study verifies the effectiveness of the adaptive coupling model in capturing the main features of dynamic crack propagation and branching.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Construction & Building Technology
Haolong Guo, Hailong Wang, Hao Li, Lisi Wei, Yue Li
Summary: The study explores the impact of calcium carbonate whisker powder on the properties of hybrid fiber concrete. The addition of whiskers and hybrid fibers effectively improves the compressive and flexural strengths of the concrete. Furthermore, the porosity optimization and strain rate enhancement contribute to the overall strength and toughness improvement.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Engineering, Multidisciplinary
Guangda Lu, Jianbing Chen
Summary: The newly proposed nonlocal macro-meso-scale damage (NMMD) model has been successfully extended to dynamic cracking simulation within the framework of continuum damage mechanics. Through numerical algorithms, this model proves to be effective in simulating the dynamic damage behavior of materials.
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Yu Foong Lam, Taufiq Abdullah, Kedar Kirane
Summary: This work investigates the relationship between dynamic crack penetration and deflection at a material interface for materials with strain rate dependent damage evolution. A strain rate dependent continuum damage mechanics (CDM) model is used to analyze the behavior, where the material point softening damage law scales with the strain rate. The model is calibrated and validated with experimental data, and shows good prediction of crack behavior. It is found that the local strain rates at the interface significantly affect the bulk and interface strengths and toughnesses, resulting in increased crack penetration. Boundary conditions also play a significant role in predicting cracking behavior.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Mechanics
Ke Yuan, Kai Liu, Zhonggang Wang, Kai Wei, Mingzhi Yang
Summary: This study investigates the influence of mass and dimension of rigid projectiles on the damage behaviors of carbon fiber reinforced plastic (CFRP) laminates. Experimental impact tests and numerical modeling are conducted, revealing that projectile dimension is related to penetration and delamination mode of CFRP, while projectile mass affects dynamic deformation.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Engineering, Mechanical
Koki Tazoe, Genki Yagawa
Summary: The study discusses the simulation of fatigue crack propagation using smoothed particle hydrodynamics for nonplanar crack propagation problems in a three-dimensional body. The proposed algorithm and model successfully matched experimental results, indicating its value in estimating nonplanar fatigue crack propagation in actual mechanical structures.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2022)
Article
Chemistry, Physical
Govind Paneru, Sandipan Dutta, Hyuk Kyu Pak
Summary: Brownian information engines can extract work from thermal fluctuations by utilizing information. In this study, we introduce a prototype model for a Brownian information engine operating in an active bath, which is capable of extracting more work than its thermal counterpart. We obtain a general integral fluctuation theorem for the active engine and discover that it exhibits different characteristics compared to engines operating in thermal baths.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Mechanics
Sneha B. Cheryala, Chandra S. Yerramalli
Summary: The effect of hybridization on the growth of interface crack along the fiber is predicted. The study shows an enhancement in the compressive splitting strength with hybridization due to the lateral confinement effect on the interfacial crack.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2024)
Article
Mechanics
P. Isaksson, P. J. J. Dumont, S. Rolland du Roscoat
Summary: The study found that networks with higher relative densities are able to localize fractures in small cracks, while networks with lower densities require larger cracks. Additionally, the pore size distribution in fiber networks is diverse, with a second part describing the size distribution of larger pores and open regions being crucial for the network's global fracture behavior.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2021)
Article
Engineering, Multidisciplinary
Zediao Chen, Feng Liu
Summary: Crack propagation in brittle materials is crucial for structural safety evaluation and has wide-ranging impacts. The particle Discontinuous Deformation Analysis (DDA) is an effective method for modeling and understanding the complex behavior of cracks in brittle materials under static and dynamic loadings. By carefully investigating various stress and geometric conditions, the particle DDA can accurately reproduce crack propagation patterns and provide valuable insights into the fracture mechanism of materials.
CMES-COMPUTER MODELING IN ENGINEERING & SCIENCES
(2023)
Article
Physics, Fluids & Plasmas
Yu Zhu Lyu, Mao Sun
Summary: This study investigates the effects of insect size on the longitudinal flight dynamic stability of insects. The results show that although there is a considerable difference in mass, the flight stability mode remains the same for insects of different sizes. However, as the size decreases, the instability becomes faster, requiring a faster nervous system to control the flight.
Article
Computer Science, Interdisciplinary Applications
Qinghua Han, Xuan Liu, Jie Xu, Tong Sun
Summary: This paper proposes a rapid and simple process of visual measurement from the first-person perspective using smartphones. It utilizes trained convolutional neural networks and gesture detection for man-machine interactive operations. The feasibility of measuring deformation of structural components is verified through experimental data, and further expansions of this method are discussed.
COMPUTER-AIDED CIVIL AND INFRASTRUCTURE ENGINEERING
(2023)
Article
Construction & Building Technology
Qiangqiang Han, Lu Jiang, Yu Zhang, Wenjing Wang, Pengjun Li, Wei Lu, Hua Xia, Zhu Li
Summary: This study investigates the self-healing effect of microbial self-healing concrete with MICP functionality in dynamic water environments for the first time. It was found that mortar specimens containing basalt fibers had the best crack-healing effect compared to other fibers. This research provides a theoretical basis and support for the engineering application of microbial self-healing concrete.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Lukas Schoeller, Daniel Schneider, Christoph Herrmann, Andreas Prahs, Britta Nestler
Summary: The phase-field method is widely used for modeling crack propagation in material science, but most models are designed for homogeneous systems. This study introduces a new phase-field model with multiple crack order parameters for heterogeneous systems, which shows better performance in reproducing analytical solutions and describing complex fracture behavior.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Taufiq Abdullah, Kedar Kirane
Summary: This paper investigates the mesh objectivity in dynamic fracture analyses using strain rate dependent damage evolution as the localization limiter. It is found that the rate dependent damage model only yields mesh objective predictions at higher loading rates, while results are not mesh objective at lower loading rates. The regularization effect at higher rates is due to an intrinsic length-scale induced by the rate dependent damage law.
MECHANICS OF MATERIALS
(2023)
