Article
Mechanics
Khaoula Dorhmi, Katell Derrien, Zehoua Hadjem-Hamouche, Leo Morin, Frederic Bonnet, Jean-Pierre Chevalier
Summary: This study investigates the effective properties of Fe-TiB2 composites obtained after hot or cold rolling, measuring the elastic moduli experimentally and using various methods. Microstructure analyses based on SEM observations are conducted to characterize particle and cracks distribution, and 3D representative microstructures are generated using the RSA method. The overall elastic behavior of the composites is determined numerically through full-field FFT-based simulations, showing a significant improvement in specific stiffness compared to standard steels regardless of processing conditions.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Soheil Firooz, George Chatzigeorgiou, Paul Steinmann, Ali Javili
Summary: This manuscript incorporates a novel interface model into the Mori-Tanaka method to determine effective properties and average local fields of composites. The significance of interface position on the overall response of heterogeneous materials is highlighted through computational simulations and numerical examples.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Mechanics
Soheil Firooz, George Chatzigeorgiou, Paul Steinmann, Ali Javili
Summary: This paper introduces a new interface model that allows for arbitrary interface positions and highlights the importance of interface position on the overall response of heterogeneous materials. Through analytical solutions and finite element method simulations and comparisons, the effectiveness and applicability of the interface model are validated.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Diwakar Swaroop, Deepjyoti Dhar, Anandavel Suriyan, Atul Jain
Summary: This paper introduces the commonly used mean field homogenization methods and their applications in composite materials, analyzes the issues of multi-step Mori-Tanaka method in terms of physical admissibility and accuracy of predictions, and compares and evaluates multiple implementation schemes.
MECHANICS OF MATERIALS
(2022)
Article
Mechanics
Przemyslaw Sadowski, Katarzyna Kowalczyk-Gajewska, Stanislaw Stupkiewicz
Summary: The Mori-Tanaka model combines simplicity and good predictive capabilities, but the use of the Perzyna-type viscoplasticity model may lead to spurious softening in the macroscopic response.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2021)
Article
Mechanics
Qiang Chen, George Chatzigeorgiou, Fodil Meraghni
Summary: This paper proposes an extended Mori-Tanaka approach to study the piezoelectric response of unidirectional nanoporous composites with energetic surfaces. The simulation includes the consideration of interface using the generalized Gurtin-Murdoch coherent interface model. Analytical solutions for Eshelby's inhomogeneity problems are obtained and the extended multiphysics Mori-Tanaka homogenization scheme is utilized. Comparison with other methods shows the reliability and accuracy of the proposed approach.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Civil
Zehua Xu, Qingxin Zhao, Weichao Guo, Jinrui Zhang, Jiannan Tong, Dongli Wang
Summary: This study analyzed the effect of the interface transition zone (ITZ) on the creep performance of concrete and proposed a prediction model considering the viscoelasticity of the ITZ. Experimental validation showed that the model accurately simulated the creep behavior of concrete specimens with different ratios of fly ash and ground slag. It was found that the presence of a viscoelastic ITZ promoted concrete creep.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
George Chatzigeorgiou
Summary: The study demonstrates that multilayered composite structures can be utilized for validating micromechanics techniques and provide the same solution as periodic homogenization methods.
MECHANICS OF MATERIALS
(2022)
Article
Geochemistry & Geophysics
T. S. Charlton, M. Goodarzi, M. Rouainia, A. C. Aplin, P. Cubillas
Summary: This study investigates the geomechanical properties of organic-rich, calcareous shales buried to 100-180 degrees C, finding that the elastic stiffness increases with thermal maturity due to intense carbonate cementation. A multiscale model accurately predicts stiffness at micro and core scales, showing a negative correlation between creep modulus and clay/kerogen content.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Engineering, Multidisciplinary
Petr Henys, Gleb Pokatilov
Summary: Computational homogenization is an effective method for designing material microstructures and exploring new materials with superior performances. However, the reliance on finite element discretization in the homogenization method can be computationally restrictive in terms of efficiency and accuracy. This study investigates the use of the smoothed finite element variant, which demonstrates improved accuracy and efficiency compared to regular finite element methods.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Article
Mechanics
Strahinja Milenkovic, Vukasin Slavkovic, Cristiano Fragassa, Nenad Grujovic, Nikola Palic, Fatima Zivic
Summary: This paper presents the fabrication of high-porous composites made of PLA matrix reinforced with PVDF long fibers. The inclusion of PVDF fibers improved ductility while reducing flexural strength. Composite configurations with [-45, +45] raster orientation exhibited higher strength and stiffness in comparison to the [0, 90] orientation.
COMPOSITE STRUCTURES
(2021)
Article
Polymer Science
Michal Sejnoha, Jan Vorel, Sona Valentova, Blanka Tomkova, Jana Novotna, Guido Marseglia
Summary: This study presents a simple approach to analyze a basalt fabric reinforced composite using a multiscale method. Experimental and computational investigations were conducted to obtain material properties and model parameters. The behavior of the polymer matrix and basalt fibers were studied, and corresponding models were developed to describe the mechanical response of the composite material.
Article
Engineering, Chemical
Ce Liang, Changgeng Shuai, Xue Yang, Xin Wang
Summary: A multi-scale model is proposed to investigate the frictional behavior of copper-CNT/polytetrafluoroethylene. The simulation results show that the filling of CNTs can effectively improve the elastic and frictional properties of the PTFE matrix, with the degree of improvement related to the orientation and mass fraction of the CNTs.
Article
Construction & Building Technology
Xianglei Cai, Lihua Zhang, Weidong Pan, Weilong Wang, Qingfa Guan, Shengtian Zhai, Laibao Liu, Yunsheng Zhang
Summary: In this study, an improved Mori-Tanaka model (IMT) was proposed to estimate the elastic modulus of crumb rubber concrete (CRC). The IMT model showed more accurate prediction of the elastic modulus of CRC and assessed the importance of different factors influencing its elastic modulus.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Review
Engineering, Mechanical
Jose Antonio Franca Araujo, Marcelo Cavalcanti Rodrigues, Raul Bernardo de Pontes Pires
Summary: Investigated the yield stress of the mast of an oil and gas production rig, which is manufactured with a composite material made of a metal matrix and randomly distributed spherical inclusions. Used the Mori-Tanaka homogenization scheme to obtain effective elastic properties and analyzed the overall behavior of the mast using the finite element method. Results showed that using the composite material increased the mast yield and buckling safety coefficient by 16.26% and 8.56% respectively, compared to using only the metal matrix.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2023)
Article
Engineering, Mechanical
S. M. Hosseini, A. Habibolahzadeh, J. Nemecek
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2019)
Article
Green & Sustainable Science & Technology
Shahlaa Al Wakeel, Jiri Nemecek, Linfei Li, Yunping Xi, Mija Hubler
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2019)
Article
Construction & Building Technology
Jiri Nemecek, Jan Manak, Jiri Nemecek, Tomas Krejci
CEMENT & CONCRETE COMPOSITES
(2019)
Article
Instruments & Instrumentation
D. Vokoun, L. Kaderavek, J. Balogova, L. Fekete, M. Landa, J. Drahokoupil, J. Nemecek, L. Heller
SMART MATERIALS AND STRUCTURES
(2020)
Article
Nanoscience & Nanotechnology
Farahnaz Haftlang, Abbas Zarei-Hanzaki, Hamid Reza Abedi, Mohammad Amin Kalaei, Jiri Nemecek, Jaroslav Malek
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2020)
Article
Materials Science, Coatings & Films
S. Bakardjieva, P. Horak, J. Vacik, A. Cannavo, V. Lavrentiev, A. Torrisi, A. Michalcova, R. Klie, X. Rui, L. Calcagno, Jiri Nemecek, G. Ceccio
SURFACE & COATINGS TECHNOLOGY
(2020)
Article
Materials Science, Multidisciplinary
Jiri Nemecek, Jaroslav Lukes, Jiri Nemecek
MATERIALS TODAY COMMUNICATIONS
(2020)
Article
Chemistry, Physical
Andrij Milenin, Miroslaw Wrobel, Piotr Kustra, Jiri Nemecek
Summary: This paper examines the surface roughness of a thin brass wire after two dieless drawing processes. The results show that incremental dieless drawing has higher efficiency and significantly lower surface roughness, and this effect can be explained by numerical modeling.
Article
Chemistry, Multidisciplinary
Snejana Bakardjieva, Jiri Plocek, Bauyrzhan Ismagulov, Jaroslav Kupcik, Jiri Vacik, Giovanni Ceccio, Vasily Lavrentiev, Jiri Nemecek, Stefan Michna, Robert Klie
Summary: Layered ternary Ti2SnC carbides can bridge the gap between metals and ceramics. In this study, Ti2SnC materials were synthesized using two different methods and their irradiation-induced resistivity was examined. Structural analysis showed irradiation-induced beta-Sn surface segregation. Nanoindentation experiments showed that irradiation had minimal effect on the hardness and Young's modulus of Ti2SnC materials.
Article
Construction & Building Technology
Jiri Nemecek, Pavel Travnicek, Martin Keppert, Patricie Halodova, Vit Rosnecky, Jiri Nemecek
Summary: This paper characterizes the concurrent effects of gamma-irradiation and water presence in Portland cement pastes. Nanomechanical quantification is performed on two scales to identify competing microstructural mechanisms and decouple their effects. Maximum radiation resistance is found at medium humidities, while samples irradiated below 11% RH exhibit compaction of C-S-H phases, increase of Young's modulus, and decrease of creep compliance. Irradiation in water results in decreased Young's modulus, increased creep compliance, and Portlandite loss.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Andrij Milenin, Tsuyoshi Furushima, Jiri Nemecek
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2020)
Proceedings Paper
Construction & Building Technology
Rostislav Sulc, Michal Himmel, Jiri Nemecek
SPECIAL CONCRETE AND COMPOSITES 2019
(2020)
Proceedings Paper
Construction & Building Technology
Pavel Travnicek, Jiri Nemecek
SPECIAL CONCRETE AND COMPOSITES 2019
(2020)
Proceedings Paper
Construction & Building Technology
Rostislav Sulc, Michal Himmel, Jiri Nemecek
SPECIAL CONCRETE AND COMPOSITES 2018
(2019)
Proceedings Paper
Construction & Building Technology
Vojtech Zacharda, Jiri Nemecek
SPECIAL CONCRETE AND COMPOSITES 2018
(2019)