Article
Mechanics
Masoud Rezaei, Mohsen A. Issa
Summary: This paper presents a comprehensive experimental investigation of the dynamic size effect and fracture characteristics of concrete, exploring the effect of structural size and aggregate size on the dynamic strength of concrete.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Construction & Building Technology
Farzad Hejazi, Hogr Karim, Hamid Kazemi, Shahriar Shahbazpanahi, Amir Mosavi
Summary: In this paper, a numerical model based on nonlinear fracture mechanics is developed to study the propagation of cracks in CFRP-strengthened connections. Experimental results showed that the CFRP sheets prevented crack propagation in the beam, enhancing the stability of the connection.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Mechanics
Levingshan Augusthus-Nelson, Janet M. Lees, Laurence Weekes
Summary: The aim of this study is to develop an analytical size effect model based on fundamental material and geometric properties for concrete beams that fail due to unstable crack propagation. The proposed approach takes into account the influence of concrete strength and the size effect mitigation caused by the inclusion of longitudinal reinforcement, and shows potential for application to other brittle materials and non-conventional reinforcing materials.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Construction & Building Technology
Salah F. Taher, Mariam F. Ghazy, Metwally A. Abd Elaty, Mohamed Elmasry, Sherif Elwan
Summary: This study investigated the fracture behavior of beam specimens made with different binders, including GPC and PCC, with and without steel reinforcement. The inclusion of polypropylene fibers noticeably enhanced the fracture properties of the concrete mixtures, while reducing brittleness. The results showed that GPC exhibited similar fracture behavior and properties as PCC.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2021)
Article
Construction & Building Technology
Amir Ali Emadi, Amir Modarres
Summary: This study investigated the fracture behavior of concrete containing crumb rubber, finding that increasing the percentage of crumb rubber can enhance the fracture energy and toughness of concrete while decreasing brittleness. Further analysis revealed a ratio of G(F)/G(f) of approximately 2.17 and similar size independent fracture energies calculated using modified WFM and BEM.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Computer Science, Interdisciplinary Applications
Jan Vorel, Marco Marcon, Gianluca Cusatis, Ferhun Caner, Giovanni Di Luzio, Roman Wan-Wendner
Summary: Concrete is the most important and widely used construction material, but mathematical models capturing its behavior under various loading conditions are scarce. This manuscript promotes the use of advanced concrete constitutive models by reviewing their differences regarding calibration and validation based on experimental data sets.
COMPUTERS & STRUCTURES
(2021)
Article
Mechanics
Mehran Ghasabeh, Serdar Goktepe
Summary: This manuscript presents a phase-field modeling approach to simulate thermal cracking in massive hardening concrete structures. The study focuses on the uneven temperature distribution caused by exothermic reactions during the setting and hardening of concrete, which may lead to thermal cracking. The multi-field computational approach developed incorporates chemical, thermal, mechanical, and phase-field fracture problems to accurately model the initiation and propagation of thermal cracks in concrete.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Construction & Building Technology
Pavitra T. Murru, Christa Torrence, Zachary Grasley, K. R. Rajagopal, P. Alagappan, Edward Garboczi
Summary: This study proposes a new approach to model the initiation of damage in concrete and validates its predictive ability through simulation results.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2022)
Article
Construction & Building Technology
Raffaele Cucuzza, Angelo Aloisio, Federico Accornero, Antonella Marinelli, Elisa Bassoli, Giuseppe Carlo Marano
Summary: This paper compares numerical and analytical predictions for the shear capacity of fibre-reinforced concrete beams based on experimental literature tests. The authors compared the outcomes of a FE model using the DamageTC3d constitutive model, a literature formulation, and the current proposal of the Eurocode 2 draft for fibre-reinforced structures. The paper evaluates the sensitivity of the beam response to the fracture energy Gf, modified after the Model Code 2010 formulation. The investigation reveals a dependence of the estimated fracture energy on the beam size. Furthermore, the comparison between the numerical estimates and the analytical predictions using the MC2010 and the current EC2 draft proves that the error is substantially independent of the model selection but is strongly affected by the specific case study. This fact confirms the absence of weaknesses in the numerical modelling and highlights the aleatoric uncertainties of the experimental data.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Mechanical
Mojtaba Akbari, Mohammad Hossein Nezhad Tahamtan, Saber Fallah-Valukolaee, Morteza Rezaei Zadeh Herozi, Mohammad Asghari Shirvani
Summary: This study investigates the effect of crumb rubber on the fracture characteristics and ductility of lightweight concrete, finding that increasing the percentage of rubber replacement can significantly improve fracture energy and characteristic length. Additionally, replacing rubber also increases the initial fracture energy, fracture process zone length, and fracture toughness of lightweight concrete, while reducing brittleness number.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Construction & Building Technology
Ragip Ince, Cenk Fenerli
Summary: In this study, the formulation of the two-parameter model based on the size effect was improved and tested using various specimens. The results showed slight differences among the formulas, except for the one that covered splitting specimens.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Shutong Yang, Miao Yu, Kun Dong, Yushan Yang
Summary: An analytical model is proposed to predict the local bond strength of deformed reinforcing bars anchored in concrete. Both the bond strength and the local interfacial fracture energy were found to be linked to the interfacial characteristic parameter, which takes into account the heterogeneity. The validity of the proposed model was verified through comparisons with experimental results.
MAGAZINE OF CONCRETE RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Jan Elias, Gianluca Cusatis
Summary: Mass transport phenomenon in concrete structures is coupled with their mechanical behavior, including Biot's theory and cracks. Discrete mesoscale mechanical models combined with mass transport provide a solution, but they are computationally demanding. This paper applies the asymptotic expansion homogenization technique to reduce the computational burden and solves the coupled problem successfully.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2022)
Article
Construction & Building Technology
Arash Karimipour, Jorge de Brito
Summary: The study evaluates the effect of polypropylene fibres (PPF) and silica fume (SF) on the mechanical behavior and fracture mechanics of ultra-high performance geopolymer concrete (UHPGC). Results show that the mechanical and fracture properties of UHPGC decrease significantly with 10% SF incorporation, but improve for more than 10% SF. Additionally, PPF plays a crucial role in enhancing the mechanical and fracture properties of UHPGC with SF, and adding 3% PPF can prevent a drastic reduction in properties when 10% SF is used.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Civil
Alberto Carpinteri, Federico Accornero, Renato Cafarelli
Summary: This paper overcomes the limitations of current design procedures in considering the actual crushing behavior of prestressed concrete beams using a Fracture Mechanics approach. A Cohesive/Overlapping Crack Model is used to simulate the strain-localization and softening regime of concrete, and a scale-dependent maximum reinforcement percentage formulation is provided to avoid concrete crushing failure. This approach defines the safe ductile behavior of prestressed concrete structures and formulates new standard requirements for effective structural design.
ENGINEERING STRUCTURES
(2022)
Article
Thermodynamics
Antonio Cazzani, Mauro Serra, Flavio Stochino, Emilio Turco
CONTINUUM MECHANICS AND THERMODYNAMICS
(2020)
Article
Thermodynamics
N. Grillanda, A. Chiozzi, F. Bondi, A. Tralli, F. Manconi, F. Stochino, A. Cazzani
Summary: This paper presents a numerical investigation on the statics of historical masonry stellar vaults, focusing on the mechanical behavior of the vault in Santa Maria del Monte church in Cagliari, Italy. The study uses laser scanning techniques and reverse engineering to accurately estimate the load-bearing capacity of the vault and compares the results with incremental nonlinear analyses conducted with a commercial finite element code. Additionally, a sensitivity study on the role of ribs in the structure's load-bearing capacity is included.
CONTINUUM MECHANICS AND THERMODYNAMICS
(2021)
Article
Chemistry, Multidisciplinary
Flavio Stochino, Alessandro Attoli, Giovanna Concu
APPLIED SCIENCES-BASEL
(2020)
Article
Chemistry, Physical
Jesus Suarez Gonzalez, Inigo Lopez Boadella, Fernando Lopez Gayarre, Carlos Lopez-Colina Perez, Miguel Serrano Lopez, Flavio Stochino
Editorial Material
Chemistry, Multidisciplinary
Chiara Bedon, Flavio Stochino, Daniel Honfi
APPLIED SCIENCES-BASEL
(2020)
Article
Engineering, Civil
Luisa Pani, Flavio Stochino
FRONTIERS OF STRUCTURAL AND CIVIL ENGINEERING
(2020)
Article
Chemistry, Multidisciplinary
Mauro Coni, Fausto Mistretta, Flavio Stochino, James Rombi, Mauro Sassu, Mario Lucio Puppio
Summary: The Fast-FWD is used for rapid assessment of bridge conditions. In this study, it was utilized to evaluate a single-span reinforced concrete bridge in critical condition near a suburban road. The Fast-FWD provides precise and fast measurements of bridge stiffness, offering valuable engineering information for understanding bridge conditions.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Civil
Flavio Stochino, Armin Tabandeh, Paolo Gardoni, Mauro Sassu
Summary: This paper introduces a general physics-based probabilistic demand model for the reliability analysis of RC beams under blast loading, incorporating a correction term and a model error to improve accuracy. The model, calibrated with experimental data, avoids strong dependence on specific data and identifies dominant sources of uncertainty in estimating failure probability.
ENGINEERING STRUCTURES
(2021)
Editorial Material
Chemistry, Multidisciplinary
Chiara Bedon, Flavio Stochino, Daniel Honfi
APPLIED SCIENCES-BASEL
(2022)
Article
Construction & Building Technology
Arnas Majumder, Flavio Stochino, Andrea Frattolillo, Monica Valdes, Geminiano Mancusi, Enzo Martinelli
Summary: Enhancing energy efficiency and structural capacity are the main objectives of masonry retrofitting. However, achieving both aspects simultaneously is challenging due to the competitive relationship with relevant geometric and physical parameters. This research focuses on improving the thermal insulation properties and structural behavior of composite building materials to achieve a dual positive effect. Jute fibers composite mortars with different fiber lengths and percentages were fabricated. The reinforced mortar samples showed higher ductility and strain energy, while the unreinforced samples exhibited fragile collapse. The composite samples also exhibited higher thermal resistance as the fiber percentage increased.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Flavio Stochino, Alessandro Attoli, Michele Serra, Alberto Napoli, Daniel Meloni, Fausto Mistretta
Summary: In this paper, an innovative strategy is proposed to identify structural parameters by utilizing the modal information obtained from operational modal analysis. The method shows promising performances for applications in larger structures such as bridges and buildings, especially in old existing structures with high cultural value.
Proceedings Paper
Computer Science, Interdisciplinary Applications
Luisa Pani, Lorena Francesconi, James Rombi, Flavio Stochino, Fausto Mistretta
COMPUTATIONAL SCIENCE AND ITS APPLICATIONS - ICCSA 2020, PT VII
(2020)
Proceedings Paper
Computer Science, Interdisciplinary Applications
Flavio Stochino, Mauro SassW, Fausto Mistretta
COMPUTATIONAL SCIENCE AND ITS APPLICATIONS - ICCSA 2020, PT VII
(2020)
Article
Engineering, Civil
Karandeep Singh, Paolo Gardoni, Flavio Stochino
ENGINEERING STRUCTURES
(2020)
Article
Green & Sustainable Science & Technology
Luisa Pani, Lorena Francesconi, James Rombi, Fausto Mistretta, Mauro Sassu, Flavio Stochino
Article
Mechanics
Xiaolong Liu, Kelian Luo, Pengcheng Gao, Tao Cong, Xi Wang, Wenjing Wang
Summary: This paper investigates the formation mechanisms of the zig-zag crack region on the shattered rim of railway wheels. The zig-zag crack region, identified as a typical region for crack propagation in rolling contact fatigue behavior, was observed using scanning electron microscopy and transmission electron microscopy. The formation of the zig-zag morphology is attributed to the periodic deflection of the propagation path relative to the initial propagation plane, caused by the limited plastic deformation zone at the crack tip. Grain refinement and secondary cracks in the zig-zag crack region are a result of the large compressive and shear stresses induced by rolling contact loading.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Anastasia Iziumova, Aleksei Vshivkov, Ivan Panteleev, Virginia Mubassarova, Oleg Plekhov, Denis Davydov
Summary: The aim of this study was to investigate the correlation between structural, acoustic emission, and thermal characteristics of fatigue crack growth in titanium alloys. Cluster analysis of the acoustic emission signals revealed two different types of signals observed during the fatigue crack development. It was experimentally demonstrated that the stored energy tends to reach an asymptotic value at the final stage of fatigue crack growth and this is correlated with the twinning process intensification in titanium alloy Ti Grade 2. A correlation was assumed between the stages of change in heat flux, the cumulative energy of the first cluster of acoustic emission signals, and the crack length.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
M. Vieira de Carvalho, I. A. Rodrigues Lopes, F. M. Andrade Pires
Summary: This study investigates the numerical challenges of fracture mechanics models within implicit quasi-static frameworks and proposes an instability criterion. The ratio of cohesive to internal power is identified as a crucial factor. Two strategies for handling fracture problems with instabilities are discussed and a comparative assessment is performed. The study also examines more complex material responses, including transformation-induced plasticity effects.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Thomas Duminy, Aurelien Doitrand, Sylvain Meille
Summary: This study conducted in situ wedge splitting tests on millimeter-size PMMA samples and proposed a method to determine the material tensile strength and critical energy release rate using digital image correlation and a full finite element implementation of the coupled criterion.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Xin Chang, Xingyi Wang, Chunhe Yang, Yintong Guo, Yanghui Wan
Summary: The influence of cyclic thermal shock and high-temperature acid etching on the Mode I fracture of shale was investigated in this study. It was found that cyclic thermal shock severely degrades the strength and fracture toughness of shale, while high-temperature acid etching treatment improves the fracture toughness. These findings are valuable for optimizing process parameters to reduce initiation pressure in deep shale formations.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Liaojun Yao, Mingyue Chuai, Zhangming Lyu, Xiangming Chen, Licheng Guo, R. C. Alderliesten
Summary: Methods based on fracture mechanics have been widely used in fatigue delamination growth (FDG) characterization of composite laminates. This study proposes appropriate similitude parameters to represent FDG behavior with different R-ratios.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Zesheng Zang, Zhonghui Li, Yue Niu, Shan Yin
Summary: This study conducted experiments and recorded signals to investigate the fracture behavior and damage evolution characteristics of coal samples. The results showed that as loading proceeds, the stress, electric potential (EP), and acoustic emission (AE) values increase, and EP and AE signals are excited when stress drops. The fracture behavior of coal samples is altered by flaw inclination, and the destruction mode becomes increasingly complicated. The damage evolution characteristics of coal samples can be evaluated and analyzed by defining the coefficient of variation (CV value) of EP and the b value of AE.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Clotilde Berdin, Nathalie Prud'homme
Summary: In this study, zirconia layers with different fractions of tetragonal phase and thicknesses were tested for multi-cracking behavior. Cracks perpendicular to the tensile direction were observed, showing a blunting effect into the substrate. The ratio of crack spacing at saturation to layer thickness decreased as the layer thickness increased. Unit cell modeling was used to establish a relationship between crack spacing and layer strength, which fell within the bounds of Hu and Evans model and was found to be insensitive to the tetragonal zirconia fraction.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Huadong Zhang, Weichen Kong, Y. H. Liu, Yuh J. Chao
Summary: Williams' series expansion crack tip solution in linear elasticity is modified to include a uniform crack face pressure. Practical methods to calculate T-stress from near crack tip stresses are outlined. The analytical results are consistent with numerical results.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Jiahao Kong, Haoyue Han, Tao Wang, Guangyan Huang, Zhuo Zhuang
Summary: This paper introduces a phase-field model for polymer foam materials by combining the phase-field method with the crushable foam model. The model is calibrated using experimental data and successfully simulates the fracture processes of polyurethane under different loading conditions. The study is important for the engineering applications of polymer foam materials.
ENGINEERING FRACTURE MECHANICS
(2024)
