Article
Engineering, Mechanical
Gilles Rousselier
Summary: The paper compares the mechanical behaviors of the GTN model and the Rousselier model, revealing their different performances in strain localization, as well as discussing issues related to void growth and finite element discretization. The GTN model is unable to achieve plane strain localization under certain stress conditions, while the Rousselier model is capable of achieving this goal under all stress conditions.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Biophysics
Tarun Gangwar, D. Jo Heuschele, George Annor, Alex Fok, Kevin P. Smith, Dominik Schillinger
Summary: This article presents a multiscale approach to predict the macroscale stiffness and strength properties of crop stem materials based on their hierarchical microstructure. Experimental multiscale characterization and a micromechanics-based model were developed and validated using oat stem samples. The model was shown to accurately predict the effects of genetic modifications on the microscale composition and morphology of thale cress on its macroscale mechanical properties.
BIOMECHANICS AND MODELING IN MECHANOBIOLOGY
(2021)
Article
Biophysics
A. Aghaei, N. Bochud, G. Rosi, S. Naili
Summary: This study aims to develop a multiscale model to describe the overall mechanical behavior of tendon-to-bone insertion, predicting the anisotropic stiffness tensor of the interphase by modeling its elastic response at different scales. The model has implications for designing bioinspired bi-materials with functionally graded properties like the tendon-to-bone insertion.
BIOMECHANICS AND MODELING IN MECHANOBIOLOGY
(2021)
Article
Mechanics
Xubin Peng, Huadong Yong, Youhe Zhou
Summary: This study investigates the responses of single-lap and bridge joints under tension and bending tests through three-dimensional simulations. The results show that the bending radius has a strong impact on the damage level of the solder layer, and the damage pattern of the solder layer is related to the joint configurations.
COMPOSITE STRUCTURES
(2022)
Article
Construction & Building Technology
Tagir Iskhakov, Jithender J. Timothy, Sven Plueckelmann, Rolf Breitenbuecher, Guenther Meschke
Summary: Tunnel linings installed in difficult geological conditions, such as Opalinus Clay and rocks containing anhydrite, can be protected from deterioration and failure by incorporating a compressible cementitious layer. The compaction potential of this layer can be improved by introducing soft inclusions or air bubbles in the cementitious mix. However, finding the optimal mix that provides both compaction potential and strength is important. Computational modeling can be used to design the compressible composite and predict its behavior based on material properties and volume fraction of the components. Experimental investigations are conducted to validate the model predictions.
CEMENT & CONCRETE COMPOSITES
(2023)
Article
Engineering, Biomedical
Andre Gutierrez Marty, Paul E. Barbone, Elise F. Morgan
Summary: This study aims to understand how aging-related changes in cortical bone microstructure affect mechanical properties at the macroscale. By modeling cortical bone as a bundle of elastic-plastic fibers and simulating aging-related changes, the study found that changes to all three input parameters were needed to capture the decline in mechanical properties. Rupture of interstitial fibers led to initial strength loss, while plasticity and gradual rupture of osteons contributed to the remainder of the response.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Pierfrancesco Gaziano, Elisabetta Monaldo, Cristina Falcinelli, Giuseppe Vairo
Summary: In this paper, a multiscale modelling strategy is used to analyze the elasto-damage response of osteons, providing a refined mechanical description of cortical bone tissue. The structural features of osteons and the equivalent mechanical response of their constituents are described. Finite-element techniques are used to simulate the experimental tests of isolated osteons under different loading conditions.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2022)
Article
Construction & Building Technology
Tagir Iskhakov, Colin Giebson, Jithender J. Timothy, Horst M. Ludwig, Gunther Meschke
Summary: The impact of ASR on expansion and damage of pavement concrete specimens was studied through experiments and computational modeling. An ASR-induced expansion simulation model was developed based on experimental data, showing that microcracking in aggregate predominantly controls expansion in specimens exposed to water, while specimens subjected to external alkali supply exhibit microcracking in both aggregate and cement paste.
CEMENT AND CONCRETE RESEARCH
(2021)
Article
Mechanics
Mehrdad Ghadami
Summary: The first observed damage in a composite laminate is matrix cracks, which reduce the equivalent mechanical properties and lead to nonlinear stress-strain behavior. Talreja has proposed an effective damage method and Singh has developed a nonlinear model to assess stiffness reduction considering the crack shielding effect (CSE). However, Singh's model has limitations and this paper presents a new anisotropic nonlinear multiscale damage model based on Talreja's method.
Article
Mechanics
Mehrdad Ghadami
Summary: This paper presents a new anisotropic nonlinear multiscale damage model based on Talreja's method to predict the stress-strain behavior of composite laminates. By conducting a light-transmission experiment and using finite-element micromechanics, the relationship between damage progression, mechanical properties equations, and crack density is determined. The model is validated and compared with existing models, and reference state selection criteria are established for optimal predictions.
Article
Mechanics
O. Rokos, R. H. J. Peerlings, J. P. M. Hoefnagels, M. G. D. Geers
Summary: Micromechanical constitutive parameters are important and pose experimental challenges for accurate identification in engineering materials. This paper addresses the parameter identification through multiscale experiments combined with Integrated Digital Image Correlation (IDIC) in conjunction with various computational homogenization schemes. The accuracy and performance of the discussed techniques are analyzed and results demonstrate high accuracy and robustness.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2023)
Article
Biophysics
Yusen Chen, Rui Wu, Bo Yang, Guannan Wang
Summary: This paper establishes a multiscale micromechanics model of cortical bone and investigates the effect of microstructure on its elastic behavior. The Mori-Tanaka model and locally exact homogenization theory are introduced to homogenize the heterogeneous materials at each level. The model predicts the effective moduli of cortical bone and the results are verified against experimental data. The study also shows that hydration has a greater influence on the mechanical properties of cortical bone than aging.
BIOMECHANICS AND MODELING IN MECHANOBIOLOGY
(2022)
Article
Mechanics
Roohallah Ghasemi, Majid Safarabadi, Mojtaba Haghighi-Yazdi, Sayed Abolfazl Mirdehghan
Summary: Textile-reinforced concrete (TRC) is a promising composite material with increasing demand in the construction industry. This study investigates the time-dependent behavior of TRC in flexural creep by conducting experimental and analytical studies. An analytical viscoelastic model considering the random variation of cracking force is proposed to predict the creep deformation of TRC. Short-term and long-term creep tests validate the effectiveness of the probabilistic model in predicting TRC creep behavior.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
Xia Zhang, Enli Chen, Pengyong Gao, Chundi Si
Summary: This study developed a micromechanical model and verified it through a three-point bending test to investigate microcrack propagation in bitumen specimens under bending fatigue load. Microdynamic simulations showed that microcracks underwent an initial transition period, rapid growth period, and stable period, mainly within the asphalt mortar or asphalt-aggregate interface. The study also found that under dynamic load, the longitudinal stress at microcracks was higher and the number of microcracks increased more rapidly compared to static load. The micromechanical modeling method has the potential to predict the position and width of macroscopic cracks in asphalt pavement.
ARCHIVE OF APPLIED MECHANICS
(2021)
Article
Mechanics
Haifeng He, Ye Zhou, Heli Liu, Caichao Zhu, Bo Xiao, Taihua Zhang
Summary: In this study, a novel gear bending fatigue model incorporating gradient characteristics of hardness and residual stress based on the continuum damage theory was proposed to evaluate the bending fatigue behavior of case hardened wind turbine gear. The damage equations involving the residual stress and hardness gradients and damage coupled constitutive equations were derived and experimentally validated. The evolution of damage, stress response, and mechanical properties were investigated, and the predicted gear bending fatigue lives of different case hardened gears were within the 1.5 scatter factor bond.
ENGINEERING FRACTURE MECHANICS
(2023)
Meeting Abstract
Computer Science, Interdisciplinary Applications
A. Laouira, J. Rahmoun, H. Naceur, P. Drazetic, C. Fontaine, G. L. Niebur
COMPUTER METHODS IN BIOMECHANICS AND BIOMEDICAL ENGINEERING
(2015)
Article
Computer Science, Interdisciplinary Applications
Jun Lin, Hakim Naceur, Daniel Coutellier, Abdel Laksimi
ENGINEERING COMPUTATIONS
(2015)
Article
Mechanics
C. Durand, M. Klingler, D. Coutellier, H. Naceur
ENGINEERING FRACTURE MECHANICS
(2015)
Article
Engineering, Mechanical
Hakim Naceur, Jun Lin, Daniel Coutellier, Abdel Laksimi
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
(2015)
Article
Mechanics
J. Lin, H. Naceur, D. Coutellier, S. Abrate
Article
Mathematics, Interdisciplinary Applications
Xavier J-G Elie-Dit-Cosaque, Augustin Gakwaya, Hakim Naceur
COMPUTATIONAL MECHANICS
(2015)
Meeting Abstract
Computer Science, Interdisciplinary Applications
Aflalo Elizabeth, Erich-Walter Bluemcke, Mark Kloepper, Hakim Naceur
COMPUTER METHODS IN BIOMECHANICS AND BIOMEDICAL ENGINEERING
(2014)
Meeting Abstract
Computer Science, Interdisciplinary Applications
B. Fontenier, A. Hault-Dubrulle, J. Rahmoun, H. Naceur, P. Drazetic, C. Fontaine
COMPUTER METHODS IN BIOMECHANICS AND BIOMEDICAL ENGINEERING
(2014)
Article
Automation & Control Systems
Jianjun Wu, Xin Wu, Liangcai Deng, Hakim Naceur
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2014)
Article
Materials Science, Multidisciplinary
H. Naceur, J. Rahmoun, J. Halgrin, P. Chabrand
INTERNATIONAL JOURNAL OF DAMAGE MECHANICS
(2015)
Article
Mechanics
Jun Lin, Hakim Naceur, Daniel Coutellier, Abdel Laksimi
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2014)
Article
Mechanics
A. T. Settet, A. Nour, H. Zahloul, H. Naceur
MECHANICS OF COMPOSITE MATERIALS
(2014)
Proceedings Paper
Engineering, Mechanical
Julien Carrier, Eric Markiewicz, Gregory Haugou, David Lebaillif, Nicolas Leconte, Hakim Naceur
DYMAT 2015 - 11TH INTERNATIONAL CONFERENCE ON THE MECHANICAL AND PHYSICAL BEHAVIOUR OF MATERIALS UNDER DYNAMIC LOADING
(2015)
Proceedings Paper
Engineering, Electrical & Electronic
C. Durand, M. Klingler, D. Coutellier, H. Naceur
2014 15TH INTERNATIONAL CONFERENCE ON THERMAL, MECHANICAL AND MULTI-PHYSICS SIMULATION AND EXPERIMENTS IN MICROELECTRONICS AND MICROSYSTEMS (EUROSIME)
(2014)
Proceedings Paper
Engineering, Mechanical
Camille Durand, Markus Klingler, Daniel Coutellier, Hakim Naceur, Arian Grams, Olaf Wittler
FDMD II - JIP 2014 - FATIGUE DESIGN & MATERIAL DEFECTS
(2014)
