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
Mechanics
Gili Lifshitz Sherzer, Younes Fadakar Alghalandis, Karl Peterson
Summary: In this study, we have developed innovative improvements to the Lattice Discrete Particle Model (LDPM) that enable accurate simulation of aggregate fracturing in concrete. By comparing the simulation results with scans of actual cracking, we have achieved matching fracturing patterns. Furthermore, our method has demonstrated good fits for the brittleness of High Strength Concrete (HSC) when compared with experimental results for a three-point bending beam with a notch.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Geochemistry & Geophysics
Meiben Gao, Shenghua Cui, Tianbin Li, Chunchi Ma, Zhongteng Wu, Yan Zhang, Yang Gao, Zhe Fu, Yuyi Zhong
Summary: The three-parameter Weibull distribution is capable of fitting various experimental data and provides a unified expression for characterizing different constitutive behaviors of rocks. A statistical damage constitutive model based on this distribution was constructed and proven effective in expressing elastic-brittle, strain softening, and elastic-plastic behaviors of rocks. It has potential applications in numerical simulations for mining engineering, geoengineering, and other rock engineering fields.
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
Materials Science, Multidisciplinary
Tommaso Magrini, Ayca Senol, Robert Style, Florian Bouville, Andre R. Studart
Summary: Lightweight composites have revolutionized the aviation industry and will continue to play a major role in energy-efficient transportation systems. Inspired by the hierarchical architecture of mollusk shells, we have created tough composites by combining soft polymer layers with alternating nacre-like layers. Our research provides new insights into the interplay of multiscale toughening mechanisms in hierarchical bioinspired architectures and offers guidelines for designing and manufacturing strong and tough lightweight composites.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2022)
Article
Engineering, Multidisciplinary
Johannes Reiner, Thomas Feser, Matthias Waimer, Anoush Poursartip, Heinz Voggenreiter, Reza Vaziri
Summary: This study explores the challenges of finite element simulation of industrial size composite structures under crush loading, investigating the capabilities, limitations, and challenges of physically-based axial crush simulation of composite structures without the use of non-physical parameters for model calibration. It highlights the unsuitability of crack band scaling in CDM-based material models for axial crushing simulations dominated by fragmentation.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Materials Science, Ceramics
Roman Papsik, Oldrich Sevecek, Eric Martin, Raul Bermejo
Summary: Crack initiation in brittle materials upon spherical indentation is influenced by tensile radial stresses during loading. The location of crack onset often differs from the site of maximal stress. The initiation forces and location of crack onset depend on geometrical parameters and surface condition. A coupled stress-energy fracture criterion is introduced in this work to describe the initiation of ring cracks in brittle materials, considering the geometry of the contact and the material's inherent strength and fracture toughness. The criterion can explain the location offset of the ring crack upon loading and predict the initiation force, provided surface compressive stresses are considered. The criterion can also estimate the surface residual stress of ceramic parts based on contact damage experiments.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Mechanics
P. B. Ataabadi, D. Karagiozova, M. Alves
Summary: This research numerically investigated the dynamic axial crushing response of cylindrical tubes made of unidirectional carbon fiber-epoxy material, focusing on generating realistic crushing modes and morphologies, as well as accurately predicting crushing force. Experimental validation was conducted to verify the accuracy and reliability of the FE model.
COMPOSITE STRUCTURES
(2022)
Article
Chemistry, Physical
Simon Moser, Yanxia Feng, Oncay Yasa, Stefanie Heyden, Michael Kessler, Esther Amstad, Eric R. Dufresne, Robert K. Katzschmann, Robert W. Style
Summary: Inspired by the cellular design of plant tissue, this study presents a method for making versatile, tough, highly water-swelling composites. By embedding highly swelling hydrogel particles inside tough, water-permeable, elastomeric matrices, the resulting composites inherit the properties of both hydrogels and elastomers. These hydroelastomers are easy to fabricate, based on widely-available materials, and can be molded or extruded into complex swelling geometries, making them excellent candidates for soft robotics and swelling-based actuation.
Article
Engineering, Mechanical
Pengfei Jia, Kai Huang, Hongjun Yu, Takahiro Shimada, Licheng Guo, Takayuki Kitamura
Summary: This paper proposes a novel atomic J-integral calculation method, which calculates the local displacement gradient and stress field for discrete models, and verifies its effectiveness and path-independency. It is also confirmed that this method is dimension-independent even at ultra-small scales.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Engineering, Multidisciplinary
Leo Morin, Amit Acharya
Summary: This study develops a computational model for arbitrary brittle crack propagation within a fault-like layer in a 3D elastic domain, and analyzes its associated quasi-static and dynamic fields. The model utilizes FFT-based solver for linear momentum balance and a Godunov-type projection-evolution method for crack evolution equation. Applications of the model include exploring equilibria, irreversibility, strength and toughness criteria, and crack propagation under different loading conditions.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2021)
Review
Construction & Building Technology
Chaopeng Xie, Mingli Cao, Mehran Khan, Hong Yin, Junfeng Guan
Summary: The paper introduces theoretical models, testing methods, and influencing factors of fracture mechanics in FRCC, discusses reinforcement mechanisms for improving fracture properties, and lays a foundation for further research.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Mechanics
Branislav Djordjevic, Sreten Mastilovic, Aleksandar Sedmak, Aleksandar Dimic, Milan Kljajin
Summary: The phenomenon of ductile-to-brittle transition in ferritic steels has been a research challenge for the last 50 years. Fracture mechanics concepts have been used to characterize this problem and statistical methods have been applied to deal with the scatter of experimental data. This paper provides a historical overview of the studies in this field and presents two new approaches.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Engineering, Manufacturing
Roberto Ferreira Motta Jr, Rene Alderliesten, Dimitrios Zarouchas, Marcos Yutaka Shiino, Maria Odila Hilario Cioffi, Herman Jacobus Cornelis Voorwald
Summary: This research investigates strain energy release within fatigue load cycle using acoustic emission and formulates the correlation between measured strain energy release and acoustic emission energy. The distribution of strain energy release within the loading cycle indicates activation of different damage mechanisms at different energy thresholds. The presence of multiple energy thresholds suggests distinct resistances to damage propagation depending on the applied loading cycle.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Chemistry, Physical
C. Chen, Y. Chen, K. L. Li, S. Y. Yang, J. Wang, S. Wang, Y. R. Mao, L. M. Luo, Y. C. Wu
Summary: The study investigates the ductile-brittle transition behaviors of W/Ta multilayer composites through uniaxial tensile and three-point bending tests at temperatures ranging from room temperature to 600 degrees C. The DBTT of composites bonded at 1000 degrees C is around 200 degrees C, while the DBTT of composites bonded above 1200 degrees C is about 300 degrees C. The strength and ductility of the composites improve with increasing temperature when tested below the DBTT, with the highest tensile strength observed at 300 degrees C. The DBTT is lower during three-point bending compared to uniaxial tensile tests.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Mechanics
Ferhun C. Caner, A. Abdullah Donmez, Siddik Sener, Varol Koc
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2019)
Article
Materials Science, Ceramics
Maryam Kazembeyki, Mathieu Bauchy, Christian G. Hoover
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2019)
Article
Chemistry, Multidisciplinary
Albert M. Hung, Maryam Kazembeyki, Christian G. Hoover, Ellie H. Fini
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2019)
Article
Construction & Building Technology
Emily Ford, Aashay Arora, Barzin Mobasher, Christian G. Hoover, Narayanan Neithalath
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Engineering, Multidisciplinary
Hoang T. Nguyen, Ferhun C. Caner, Zdenek P. Bazant
Summary: This study demonstrates the explicit-to-implicit conversion of versatile microplane models for various materials, showing how it can be easily achieved and ensuring convergence. By making minor adjustments to the M7 algorithm, continuity is achieved, leading to nearly identical implicit and explicit results in challenging laboratory tests.
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
(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
Materials Science, Ceramics
Maryam Kazembeyki, Kai Yang, John C. Mauro, Morten M. Smedskjaer, Mathieu Bauchy, Christian G. Hoover
Summary: The study found that CAS glasses with different SiO2 content exhibit different behaviors in hardness and modulus, which are related to the distribution of inelastic dissipative energy volume. As SiO2 content increases, modulus decreases, while hardness shows non-monotonic behavior. Inelastic deformation is mainly contributed by shear flow (for SiO2-poor glasses) and densification (for SiO2-rich glasses).
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Ceramics
Yuzhe Cao, Maryam Kazembeyki, Longwen Tang, N. M. Anoop Krishnan, Morten M. Smedskjaer, Christian G. Hoover, Mathieu Bauchy
Summary: Nanoindentation is a widely used method to probe the mechanical properties of glasses. The complex nature of the stress field under the indenter tip and the lack of in situ characterization techniques make interpreting glasses' response to nanoindentation challenging. A numerical model using peridynamic simulations for the nanoindentation of soda-lime silicate window glass is presented, showing good agreement with experimental data and offering direct access to the stress field forming under the indenter tip.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Kai Yang, Yushu Hu, Zhou Li, N. M. Anoop Krishnan, Morten M. Smedskjaer, Christian G. Hoover, John C. Mauro, Gaurav Sant, Mathieu Bauchy
Summary: The study presents an analytical model derived from classical molecular dynamics simulations to describe the topology of the calcium aluminosilicate ternary system. This model can determine the rigidity state of CAS systems based on composition and temperature, revealing correlations between network topology and glass-forming ability. Glass-forming ability is suggested to be encoded in the network topology of the liquid state rather than the glassy state.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Engineering, Chemical
Samia Mahouche-Chergui, Zakariae Boussaboun, Abdallah Oun, Maryam Kazembeyki, Christian G. Hoover, Benjamin Carbonnier, Claudiane M. Ouellet-Plamondon
Summary: Graphene-like hybrid nanomaterials (GHNs) were successfully synthesized using sustainable and solvent-free method, with sucrose and bentonite renewable precursors. The characterization techniques confirmed the successful transformation of sucrose to sp2-hybridized carbon, and the hybrid nanomaterials showed potential for removing water pollutants.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Computer Science, Interdisciplinary Applications
Saeed Sabounchi, Ferhun C. Caner
Summary: In this study, a microplane model based on cylindrical geometry is developed for the analysis of three-dimensional inelastic fracturing of fiber reinforced polymer composites. The model successfully bridges the behavior at the mesoscale and macroscale, and offers a much lower computational cost compared to competing models. The calibration and comparison with test data demonstrate the predictive capacity of the model.
COMPUTERS & STRUCTURES
(2022)
Article
Crystallography
Vinay Krishnan, Hamed Khodadadi Tirkolaei, Maryam Kazembeyki, Leon A. van Paassen, Christian G. Hoover, Jong Seto, Edward Kavazanjian
Summary: The mechanical properties of calcium carbonate minerals formed by enzyme-induced carbonate precipitation (EICP) were studied using nanoindentation. It was found that the modified precipitate had higher ductility and resistance to crack propagation, which may contribute to improved cementation in sands with low carbonate contents.
Article
Materials Science, Multidisciplinary
Pedro Vinicius Sousa Machado, Ferhun C. Caner, Luis Llanes, Emilio Jimenez Pique
Summary: In this study, the mechanical behavior of tungsten carbide-cobalt (WC-Co) composites under monotonic loads is extensively investigated using nanoindentation tests, tension tests on nanowires, and compression tests on micropillars. A novel computational framework is proposed, consisting of two different microplane constitutive models for the WC and Co phases. Finite element simulations based on experimental tomography re-constructions are employed to validate the models and provide further insights into the mechanical behavior of these composites.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Astronomy & Astrophysics
Gabriel Gowman, Desiree Cotto-Figueroa, Andrew Ryan, Laurence A. J. Garvie, Christian G. Hoover, Erik Asphaug
Summary: This study aims to explore the relationship between fracture roughness and sample strength. By analyzing fragments from 45 meteorites, the correlation between exterior properties and strength is found to be different and distinct identification of the three meteorites based on roughness alone is not possible. However, there is some correlation between the diffusion of fragment strength distribution and the average roughness metric.
PLANETARY SCIENCE JOURNAL
(2023)
Article
Construction & Building Technology
Emily L. Ford, Christian G. Hoover, Barzin Mobasher, Narayanan Neithalath
CONSTRUCTION AND BUILDING MATERIALS
(2020)
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)