Article
Engineering, Multidisciplinary
Bo Yin, Dong Zhao, Johannes Storm, Michael Kaliske
Summary: This study proposes a brittle damage model based on a gradient micromorphic regularization approach to address the issue of material failure mechanisms. The model incorporates a novel Representative Crack Element (RCE) framework to solve the crack kinematics problem and derives the constitutive model based on a thermodynamic consistent algorithm. The model is implemented in the Finite Element Method framework and its capability is demonstrated through numerical examples.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Engineering, Mechanical
Apiwish Thongraksa, Pornkasem Jongpradist, Pruettha Nanakorn, Jukkrawut Tunsakul
Summary: In this study, an element-free Galerkin (EFG) method is developed for analyzing shear crack growth in brittle and quasi-brittle materials using a cohesive crack model. The method shows great potential in terms of verification and application.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
Article
Engineering, Mechanical
Sakdirat Kaewunruen, Hao Fu, Caizhi Ye
Summary: This study investigates the crack behavior of prestressed concrete sleepers using three-dimensional finite element models. The results show that the cracking resistance of concrete sleepers can be enhanced by improving the compressive strength of concrete and the initial prestressing force of tendons.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Engineering, Mechanical
Daniele Gaetano, Fabrizio Greco, Lorenzo Leonetti, Paolo Lonetti, Arturo Pascuzzo, Camilla Ronchei
Summary: This work presents a novel finite element-based detailed micro-model method for nonlinear analysis of masonry structures under in-plane loading conditions. The method reproduces material nonlinearities caused by fracture phenomena at mortar joints using zero-thickness interface elements. The proposed method is validated through comparisons with experimental data.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Engineering, Mechanical
Arturo Pascuzzo, Fabrizio Greco, Lorenzo Leonetti, Paolo Lonetti, Andrea Pranno, Camilla Ronchei
Summary: This study presents an efficient cohesive finite element modeling approach based on a diffuse interelement interface strategy to reproduce the fracture behavior of quasi-brittle materials under various loading conditions. The reliability of the proposed refined fracture approach is assessed through numerical simulations of the direct tensile test, demonstrating the importance of properly calibrating the cohesive properties of the diffuse embedded interfaces for ensuring numerical accuracy and stability. Additionally, comparisons with experimental and numerical data from the literature are used to fully validate the proposed approach.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2022)
Article
Engineering, Mechanical
Lipeng Wang, Fengchao Huang, Yuegang Luo, Changzheng Chen
Summary: A dynamic model of a seal-crack rotor system was established using the finite element method, and the vibration characteristics of airflow excitation and single-crack and double-crack coupled faults were analyzed. The results show that the influence of crack damage on the system is closely related to the degree of cracks and sealing parameters.
NONLINEAR DYNAMICS
(2022)
Article
Mechanics
N. A. Kazarinov, Y. Petrov, A. Cherkasov
Summary: Classic fracture mechanics may not predict the unstable behavior exhibited by dependencies and parameters in crack propagation. Experimental results have shown various shapes of the K-I - (a)over dot curve for different materials under different loading conditions. The K-I - (a)over dot dependence is considered a material property in crack propagation prediction and simulation.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Engineering, Multidisciplinary
Peng Zhang, Chengbin Du, Wenhu Zhao, Liguo Sun
Summary: This paper extends the static contact problem of crack faces to include dynamic contact and crack propagation using the scaled boundary finite element method. The Lagrange multiplier method is used to establish the contact model between the crack faces. Results demonstrate that the dynamic contact model effectively simulates crack faces' opening and closing, with the greater influence of non-linearity of contact along a crack face on dynamic stress intensity factor and response as the crack length increases.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2021)
Article
Engineering, Geological
Erick Rogenes, Marcio Muniz de Farias, Leandro Lima Rasmussen
Summary: This paper presents a numerical model for representing the fracture process in hard rocks, validated through calibration with laboratory test results for Creighton granite. A sensitivity study led to the proposal of a calibration methodology to facilitate future use of the CVBM.
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
(2022)
Article
Engineering, Manufacturing
J. Lamon, M. R'Mili
Summary: The flaw strength data is determined through tensile tests on different fiber tow types, showing linearity between the p-quintile and flaw strength data from experimental force-strain curves, indicating flaw strength as a Gaussian variate. The Weibull distribution function is used to calculate the statistical distribution of data, which compares well with the normal distribution function. The significance of both normal and Weibull cumulative distributions of flaw strengths is discussed, as well as the theoretical material characteristic shown by the p-quintile vs. flaw strength relation.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Physics, Fluids & Plasmas
Sayako Hirobe, Kenji Imakita, Haruo Aizawa, Yasumasa Kato, Shingo Urata, Kenji Oguni
Summary: Residual stress field in solid materials can lead to dynamic fracture with high levels of tensile residual stress, which results in catastrophic destruction of materials due to cracks being fed with strain energy. This study proposes an effective mathematical model and numerical analysis method for dynamic fracture in residual stress field, with experiments and simulations validating the proposed method's ability to accurately evaluate the release and redistribution of residual stress.
Article
Engineering, Multidisciplinary
R. Alebrahim, P. Thamburaja, A. Srinivasa, J. N. Reddy
Summary: This work proposes a pseudoinverse-based finite-element solver for modeling the deformation and fracture of solids. The pseudoinverse of the stiffness matrix is calculated using a fast QR decomposition-based method. The new finite-element framework allows solving equations even when the stiffness matrix is singular and avoids the introduction of artificial regularization. The proposed method is robust in solving boundary value problems involving elastic deformation and brittle fracture, and it allows modeling the separation and fragmentation of solids during fracture.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
Article
Construction & Building Technology
Liting Yu, Yi Wu, Yejing Meng, Guojing Huang, Rui Li, Jianzhong Pei
Summary: In this study, a three-dimensional fatigue propagation model of internal cracks in semi-rigid base is established, and the stress field distribution and fatigue failure law of crack tip section inside the base are analyzed. It is found that the crack propagation is mainly dominated by type I cracks, and the modulus of the base layer influences the stress and strain fields near the crack tip. The research provides new insights into the assessment of long-life pavements and the failure mechanism of microscopic damages.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Geochemistry & Geophysics
Yves Bernabe, Matej Pec
Summary: This study proposes a reformulation of the wing crack model for understanding brittle creep and failure in rocks. The model takes into account the complex mechanical interactions of sliding and tensile wing cracks and suggests that these interactions lead to the formation of micro shear bands, which in turn affect the overall behavior of the rock. The study found that the proposed model is consistent with published creep and failure data, and can also estimate the cohesion and angle of internal friction in materials.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
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
Materials Science, Multidisciplinary
Tobias Brink, Enrico Milanese, Jean Francois Molinari
Summary: Frictional contacts lead to the formation of a third body, which consists of wear particles and their agglomerates. The behavior and properties of the third body at the nanoscale control macroscopic tribological performance. In this study, large-scale atomistic simulations on a brittle material reveal that the third body transitions from a particle-based state to a shear-band-like state by forming adhesive bridges between the particles. Initially, sliding resistance and wear rate are controlled by surface roughness, but upon agglomeration, friction becomes solely dependent on the real contact area.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Construction & Building Technology
E. R. Gallyamov, A. Leemann, B. Lothenbach, J. -f. Molinari
Summary: This paper studies the possibility of crack growth due to internal loading caused by alkali-silica reaction. The study reveals the dependence of crack growth potential on the shape of the ASR product, particularly spherical and spheroidal shapes. For a chosen material properties and expansion value, there exists a critical spheroid radius below which no crack growth is expected.
CEMENT AND CONCRETE RESEARCH
(2022)
Article
Materials Science, Composites
D. Kempesis, L. Iannucci, K. T. Ramesh, S. Del Rosso, P. T. Curtis, D. Pope, P. W. Duke
Summary: This research develops RVE-based finite element models to investigate the influence of microstructure on the overall mechanical behavior of UHMWPE composites. The models consider the randomness of fiber packing sequence and variations in fiber cross-sectional shape, and analyze the effects of interface properties uncertainties on the mechanical response. By calibrating the constituent properties and validating the models with experimental results, the shear and compression responses of UHMWPE laminates are studied.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Multidisciplinary
Kshitiz Upadhyay, Dimitris G. Giovanis, Ahmed Alshareef, Andrew K. Knutsen, Curtis L. Johnson, Aaron Carass, Philip Bayly, Michael D. Shields, K. T. Ramesh
Summary: Computational models of the human head play a crucial role in predicting traumatic brain injury, but they are associated with uncertainty and variability. This study proposes a data-driven framework for uncertainty quantification of computational head models, which reduces computational cost while providing accurate approximations. The framework employs manifold learning techniques and surrogate models to quantify uncertainty and variability in the simulated strain fields. The results highlight significant spatial variation in model uncertainty and reveal differences in uncertainty among strain-based brain injury predictor variables.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Engineering, Civil
E. R. Gallyamov, M. Corrado, J. Fauriel, J. -f. Molinari
Summary: This paper aims to analyze a concrete gravity dam in Western Switzerland using a 2D thermo-mechanical multi-scale ASR model. The simulation results are compared to field measurements and observations. The analysis reveals that temperature variation has a negligible effect on ASR advancement, and the difference in length between the upstream and downstream faces is the main reason for upstream drift at the crest level. The study also shows that ASR-related expansion anisotropy and cracks alignment are more pronounced in the upstream part and the foundation, which can be attributed to the transmission of self-weight and the constraining effect of underlying rock.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Multidisciplinary
Manon Voisin-Leprince, Joaquin Garcia-Suarez, Guillaume Anciaux, Jean-Francois Molinari
Summary: This paper discusses the multiscale modeling of a granular material trapped between continuum elastic domains. The granularity of the granular region is modeled using the discrete element method (DEM), while the elastic regions are represented by two continuum domains using the finite element method (FEM). The paper presents two different strategies for coupling the discrete and continuum domains to properly transmit waves between them. The confinement pressure results in the appearance of ghost forces, which are addressed using overlapping coupling strategies. The paper also compares the performance of the strategies and analyzes the propagation of waves through the interface.
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Xiangyu Sun, Dung-Yi Wu, Minju Kang, K. T. Ramesh, Laszlo J. Kecskes
Summary: This study examined the competition between precipitation and grain-size refinement during equal channel angular extrusion (ECAE), and validated the utility of ECAE in high-strength Mg alloy engineering.
MATERIALS CHARACTERIZATION
(2023)
Article
Nanoscience & Nanotechnology
Dung-Yi Wu, Chengyun Miao, Christopher S. DiMarco, K. T. Ramesh, Todd C. Hufnagel
Summary: Designing aluminum alloys for spall resistance involves understanding the active failure mechanisms under dynamic loading. This study uses a high-throughput laser-driven micro-flyer plate impact technique to investigate the spall failure of aluminum alloy Al7085-T711 and its microstructure. The results show that the spall strength of Al7085-T711 increases with increasing strain rate and peak shock stress. Incipient spall voids primarily initiate at Al7Cu2Fe second-phase particles. Eliminating these particles significantly improves the spall strength, suggesting the potential for improved spall resistance in commercial alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Suhas Eswarappa Prameela, Tresa M. Pollock, Dierk Raabe, Marc Andre Meyers, Assel Aitkaliyeva, Kerri-Lee Chintersingh, Zachary C. Cordero, Lori Graham-Brady
Summary: This viewpoint article discusses the importance of materials for extreme environments, and presents insights from experts in different fields regarding the most exciting advances, opportunities, and bottlenecks.
NATURE REVIEWS MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Sh. Akhondzadeh, Minju Kang, Ryan B. Sills, K. T. Ramesh, Wei Cai
Summary: A long-standing challenge in computational materials science is to establish a quantitative connection between macroscopic properties of plastic deformation and microscopic mechanisms of dislocations in crystalline materials. This study provides direct comparisons between stress-strain curves obtained from miniaturized bar experiments and those from discrete dislocation dynamics (DDD) simulations. The DDD simulations show good agreement with experimental results, but the required dislocation mobility values are significantly lower than expected. Cross-slip of screw dislocations is also found to be necessary to capture the experimental stress-strain behavior.
Article
Materials Science, Multidisciplinary
Joaquin Garcia-Suarez, Tobias Brink, Jean-Francois Molinari
Summary: Building on an analogy to ductile fracture mechanics, this study investigates the energetic cost of debris particle creation during adhesive wear. The study reveals deviations from linearity at the microscopic scale and provides a theoretical foundation to estimate the statistical distribution of sizes of fine particles emitted due to adhesive wear processes.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Engineering, Mechanical
Mohammadreza Yaghoobi, Krzysztof S. Stopka, David L. McDowell, Lori Graham-Brady, Kirubel Teferra
Summary: An analytical framework is proposed to predict the effects of sample size on the maximum value distribution of driving forces for fatigue crack formation. The work models the distribution of Fatigue Indicator Parameters (FIPs) at finite sample sizes before they converge to an extreme value distribution. It utilizes crystal plasticity finite element simulations to calibrate and evaluate the framework, achieving good agreement and accurate extrapolation.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Materials Science, Multidisciplinary
Ashwini Gupta, Anindya Bhaduri, Lori Graham-Brady
Summary: This paper presents a machine learning-based approach for multiscale mechanics modeling, which uses a deep convolutional neural network to predict the local stress tensor fields in a fiber-reinforced composite microstructure. The proposed approach significantly reduces computational cost compared to traditional multiscale modeling methods.
MECHANICS OF MATERIALS
(2023)
Article
Engineering, Mechanical
Yunho Kim, Minju Kang, Gary Simpson, Matthew Shaeffer, Justin Moreno, Daniel Magagnosc, L. J. Kecskes, J. T. Lloyd, K. T. Ramesh
Summary: This study investigates the behavior of magnesium alloys under high-speed impact through experiments and simulations. The experiments reveal the formation of a non-isotropic debris cloud after impact and rupture, which is influenced by the projectile material and impact velocity. The simulations show good agreement with the experimental results, indicating that the anisotropic strength response of magnesium plays a significant role in the formation of the debris cloud.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Multidisciplinary Sciences
Gary Simpson, Justin Moreno, Matthew Shaeffer, K. T. Ramesh
Summary: Hypervelocity impacts pose a significant threat in low-earth orbit and hypersonic flight applications. This study investigates the structure and characteristics of the impact flash generated by 3 km/s spherical projectile impacts on structural metals through experiments, demonstrating the coupling between early-stage mechanisms and later-stage ejection mechanisms.
Article
Materials Science, Multidisciplinary
Yanzheng Wang, Qian Wu, Yiran Tian, Guoliang Huang
Summary: This paper proposes the microstructure design of an odd plate and investigates the directional wave energy amplification and the presence of interface waves in odd plates through theoretical and numerical analysis. The research findings contribute to the understanding of elastic behavior in 2D non-Hermitian systems.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
F. Greco, D. Codony, H. Mohammadi, S. Fernandez-Mendez, I. Arias
Summary: This study overcomes the difficulty of harnessing the flexoelectric effect by designing multiscale metamaterials. Through topology optimization calculations, we obtain optimal structures for various apparent piezoelectric properties and find that low-area-fraction lattices are the preferred choice. The results show competitive estimations of apparent piezoelectricity compared to reference materials such as quartz and PZT ceramics.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Xiaoxuan Zhang, Tryaksh Gupta, Zhenlin Wang, Amalie Trewartha, Abraham Anapolsky, Krishna Garikipati
Summary: This study presents a computational framework for coupled electro-chemo-(nonlinear) mechanics at the particle scale in solid-state batteries, including interfacial fracture, degradation in charge transfer, and stress-dependent kinetics. The discontinuous finite element method allows for arbitrary particle shapes and geometries.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Chengguan Zhang, Xavier Balandraud, Yongjun He
Summary: The coexistence of both austenite and martensite is a common characteristic in Shape Memory Alloys (SMAs). The multiple-domain microstructures, consisting of austenite, martensite twins, and individual martensite variants, evolve collectively during the phase transformation, affecting the material's macroscopic response. This paper presents an experimentally observed interface consisting of five domains in a Ni-Mn-Ga single-crystal, and analyzes the effects of thermal loading path and material initial state on the domain pattern formation.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Shaobao Liu, Haiqian Yang, Guang-Kui Xu, Jingbo Wu, Ru Tao, Meng Wang, Rongyan He, Yulong Han, Guy M. Genin, Tian Jian Lu, Feng Xu
Summary: The balance between stress and adhesion plays a crucial role in governing the behaviors of adherent cells, such as cell migration. In certain microenvironments, such as tumor, variations in hydrostatic pressure can significantly impact cell volume and adhesion, which in turn affects cell behavior.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Xun Xiong, Qinglei Zeng, Yonghuan Wang, Ying Li
Summary: In this work, the authors investigate the possibility of enhancing the resistance to crack growth in brittle materials through microstructure design. They establish a computational framework to simulate crack propagation and characterize fracture energy. The effects of different types of voids on toughening mechanisms are explored, and the critical conditions for embrittlement-toughening transition are identified. The study also discusses the difference between void toughening in brittle and ductile materials, and extends the toughening strategy to nacre-like materials.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Huan Wang, Yong-Quan Liu, Jiu-Tao Hang, Guang-Kui Xu, Xi-Qiao Feng
Summary: This study establishes a cytoarchitectural model to accurately capture the buckling and postbuckling behaviors of epithelia under fast compression. The stress evolution of epithelia is divided into three stages: loading, phase transition, and stress recovery. The postbuckling process is governed by the active tension generated by the actomyosin network. The study also proposes a minimal model that predicts the flattening time and stress recovery extent as functions of applied strain or strain rate, in agreement with simulations and experiments.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Lei Liu, Hao Liu, Yuming He, Dabiao Liu
Summary: This study investigates the mechanics and topologically complex morphologies of twisted rubber filaments using a combination of experiment and finite strain theory. A finite strain theory for hyperelastic filaments under combined tension, bending, and torsion has been established, and an experimental and theoretical morphological phase diagram has been constructed. The results accurately determine the configuration and critical points of phase transitions, and the theoretical predictions agree closely with the measurements.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Abhishek Painuly, Kunnath Ranjith, Avinash Gupta
Summary: This paper analyzes the interfacial waves caused by frictional slipping and studies their dispersion relation and wave modes. By studying the slip waves in a geophysical model, the surface wave dispersion phenomenon is explored, and an alternative explanation is proposed.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Houlin Xu, Joshua Vievering, Hoang T. Nguyen, Yupeng Zhang, Jia-Liang Le, Zdenek P. Bazant
Summary: Motivated by the extraordinary strength of nacre, this study investigated the probabilistic distribution of fishnet strength using Monte Carlo simulations and found that previous analytical solutions are not applicable for fishnets with a large number of links. By approximating large-scale fishnets as a continuum with cracks or holes, the study revealed that the strength distribution follows the Weibull distribution. This new model has significance for optimizing the strength-weight ratio in printed material structures.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Souhayl Sadik, Arash Yavari
Summary: This paper revisits the mathematical foundations of nonlinear viscoelasticity and studies the geometry of viscoelastic deformations. It discusses the decomposition of the deformation gradient into elastic and viscous distortions and concludes that the viscous distortion can only be a two-point tensor. The governing equations of nonlinear viscoelasticity are derived and the constitutive and kinetic equations for various types of viscoelastic solids are discussed.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Wen Cheng, Hongkuan Zhang, Yu Wei, Kun Wang, Gengkai Hu
Summary: In this study, we propose a phenomenon similar to Thouless pumping for a continuous in-plane elastic system, enabling topological transport of elastic waves through spatial modulation of material elasticity. By incorporating specific lattice microstructures, termed pentamode materials, precise and robust control over elastic wave propagation is achieved.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
Article
Materials Science, Multidisciplinary
Linda Werneck, Mertcan Han, Erdost Yildiz, Marc-Andre Keip, Metin Sitti, Michael Ortiz
Summary: We have developed a simple model that describes the ionic current through neuronal membranes by considering the membrane potential and extracellular ion concentration. The model combines a simplified Poisson-Nernst-Planck model of ion transport through individual ion channels with channel activation functions calibrated from experimental data. The calibrated model accounts for the transport of calcium, sodium, potassium, and chloride and shows remarkable agreement with experimentally measured current-voltage curves for human neural cells.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2024)
