Article
Chemistry, Physical
Manish Kumar Meena, Manish Kumar, K. Lalitha, Satyanarayan Patel
Summary: Object-oriented finite element (OOF2) analysis was used to investigate the effect of ZnO inclusions on the thermomechanical properties of NBT-6BT composites. Results showed that the depolarization temperature of the composite can be further improved by using ZnO nano-wire/nano-rods instead of ZnO nanoparticle/powder.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Qiang Chen, Fodil Meraghni, George Chatzigeorgiou
Summary: This paper presents two generalized zeroth-order asymptotic homogenization schemes for analyzing the multiphysics properties of fuzzy fiber-reinforced composites. Numerical simulations confirm the accuracy of these methods.
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
(2023)
Article
Mechanics
Rui Zhang, Ran Guo
Summary: The Voronoi cell finite element model (VCFEM) was extended to study matrix-interphase interface debonding, where the interphase properties were found to have a significant influence on the overall mechanical behavior of composites during the debonding process. The proposed VCFEM was validated and shown to be more efficient in analysis of inclusion reinforced composites.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Materials Science, Composites
Yiding Li, Shibo Yan, Ying Yan, Weijie Zhang
Summary: This study proposed a high-fidelity virtual braiding model that considers the fiber-level deformation of yarns to generate realistic mesostructure of tubular composites. The method accurately models the braiding process, including the deposition zone and convergence zone. The simulated braided preforms agree well with experimental results and can facilitate the performance analysis of braided composite structures.
POLYMER COMPOSITES
(2023)
Article
Construction & Building Technology
Siyu Wu, Sukhoon Pyo
Summary: Recently, microparticles have been shown to enhance the damping performance of cementitious composites, evaluated by the damping loss factor. Although previous studies have analyzed the damping loss factors of microparticle-reinforced composites to determine optimal mixing proportions, there is currently no efficient numerical analysis method available. Here, a micromechanical three-phase model and finite element strain energy method were applied to analyze the damping loss factor of cementitious composites reinforced with hollow sphere and flake-shaped microparticles. This research demonstrates that the finite element strain energy method can effectively estimate the damping loss factor of cementitious composites with microparticles, with less than 0.1% error between experimental and simulation results.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Mechanical
E. Polyzos, D. Van Hemelrijck, L. Pyl
Summary: The article investigates the microstructural morphology of 3D printed composites and the effect of microstructural irregularities on macrostructural elastic response through stochastic homogenization modeling. A novel methodology is introduced to generate realistic and ideal contours of carbon fibers, along with a method to generate single- and multiple-fiber representative volume elements in finite element software for approximating effective elastic properties. The results of numerical and semi-analytical modeling show good agreement with analytical models.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Khodijah Kholish Rumayshah, Hermawan Judawisastra, Satrio Wicaksono, Tatacipta Dirgantara
Summary: A simplified approach for micromechanical modeling of fiber-reinforced polymer composites is proposed. The method involves subjecting a hexagonal unit cell to four loading conditions and random distribution of unit cell properties with different fiber fractions in homogenized unit cells. The results show good agreement between the predicted and experimental transverse tensile stiffness and strength of the composite, while requiring significantly less computational cost compared to classical models.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Multidisciplinary
Fei Tao, Xin Liu, Haodong Du, Wenbin Yu
Summary: This paper presents a finite element coupled positive definite deep neural networks mechanics system (FE-PDNN) that enables learning of the constitutive law based on structural level response and solves the convergence robustness issue in severely damaged materials.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Physics, Applied
D. Codony, A. Mocci, J. Barcelo-Mercader, I Arias
Summary: This paper revisits the mathematical modeling of the flexoelectric effect in the context of continuum mechanics and presents a computational technique based on B-splines to solve the associated boundary value problems. Numerical examples demonstrate the flexoelectric effect in various geometries and its application in new flexoelectric devices.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Engineering, Multidisciplinary
Pengfei Zhang, Ming Yang, Danielle Zeng, Soheil Soghrati
Summary: A new microstructure reconstruction algorithm is introduced, which is fully integrated with a non-iterative meshing algorithm named CISAMR. This algorithm allows for synthesizing finite element models of chopped fiber composite microstructures with desired statistical descriptors.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Pei-Liang Bian, Hai Qing
Summary: A new phase-field based method is proposed to represent graphene reinforced composites and investigate their mechanical properties. The model is validated through comparison with a shell based finite element model, and it provides a simple way to model thin flakes reinforced composites in FEM software.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Mechanics
Qiang Chen, George Chatzigeorgiou, Fodil Meraghni, Ali Javili
Summary: Surface piezoelectricity has been incorporated into the simulation of nanoporous materials using different models and methods, revealing size-dependent multiphysics responses. The accuracy of the computational approaches was verified through the generalized Kirsch problem, showing that homogenized properties predicted by different methods are similar for most parameters and dimensions, except for the transverse shear moduli.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2022)
Article
Nanoscience & Nanotechnology
Guilan Xue, Yimeng Zhang, Tianpeng Xie, Zhanlin Zhang, Qingjie Liu, Xiaohong Li, Xue Gou
Summary: Cell adhesion-mediated piezoelectric stimulation offers a noninvasive method for electrical regulation of cell behavior, with potential implications in tissue engineering and bioelectronic medicines. Surface modification through polydopamine can enhance cell adhesion and electromechanical self-stimulation, positively modulating intracellular calcium transients. These findings provide new insights for rational design of piezoelectric biomaterial interfaces in biomedical engineering.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Composites
Pei-Liang Bian, Hai Qing
Summary: The study investigated the mechanical properties of carbon nanotubes/nanofibers reinforced composites (CNRC) using the embedded region (ER) technique, finding it to be reliable but potentially neglecting localized stress concentration. Beam element embedded models are only suitable for nanofibers with a large aspect ratio according to the results.
JOURNAL OF COMPOSITE MATERIALS
(2021)
Article
Mechanics
Wenhai Gai, Rui Zhang, Ran Guo
Summary: This paper proposes an adaptive two-level computational model for macro and microscope analysis. It utilizes traditional displacement based finite element method for macroscopic analysis and Voronoi cell finite element model for computations of arbitrary heterogeneous domains. In the case of adaptive analysis, VCFEM mesh is used instead of finite element when local area may be destructive. By connecting the two types of elements through shared nodes and using edge displacement interpolation, a two-scale model of the coexistence of macro and micro structures is formed.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Y. Liu, K. Zweiacker, C. Liu, J. T. McKeown, J. M. K. Wiezorek
Summary: The evolution of rapid solidification microstructure and solidification interface velocity of hypereutectic Al-20at.%Cu alloy after laser melting has been studied experimentally. It was found that the formation of microstructure was dominated by eutectic, alpha-cell, and banded morphology grains, and the growth modes changed with increasing interface velocity.
Article
Materials Science, Multidisciplinary
Bharat Gwalani, Julian Escobar, Miao Song, Jonova Thomas, Joshua Silverstein, Andrew Chihpin Chuang, Dileep Singh, Michael P. Brady, Yukinori Yamamoto, Thomas R. Watkins, Arun Devaraj
Summary: Castable alumina forming austenitic alloys exhibit superior creep life and oxidation resistance at high temperatures. This study reveals the mechanism behind the enhanced creep performance of these alloys by suppressing primary carbide formation and offers a promising alloy design strategy for high-temperature applications.
Article
Materials Science, Multidisciplinary
Jian Song, Qi Zhang, Songsong Yao, Kunming Yang, Houyu Ma, Jiamiao Ni, Boan Zhong, Yue Liu, Jian Wang, Tongxiang Fan
Summary: Recent studies have shown that achieving an atomically flat surface for metals can greatly improve their oxidation resistance and enhance their electronic-optical applications. Researchers have explored the use of graphene as a covering layer to achieve atomically flat surfaces. They found that high-temperature deposited graphene on copper surfaces formed mono-atomic steps, while annealed copper and transferred graphene on copper interfaces formed multi-atomic steps.
Article
Materials Science, Multidisciplinary
Jennifer A. Glerum, Jon-Erik Mogonye, David C. Dunand
Summary: Elemental powders of Al, Ti, Sc, and Zr are blended and processed via laser powder-bed fusion to create binary and ternary alloys. The microstructural analysis and mechanical testing show that the addition of Ti results in the formation of primary precipitates, while the addition of Sc and Zr leads to the formation of fine grain bands. The Al-0.25Ti-0.25Zr alloy exhibits comparable strain rates to Al-0.5Zr at low stresses, but significantly higher strain rates at higher stresses during compressive creep testing. Finite element modeling suggests that the connectivity of coarse and fine grain regions is a critical factor affecting the creep resistance of the alloys.
Article
Materials Science, Multidisciplinary
P. Jannotti, B. C. Hornbuckle, J. T. Lloyd, N. Lorenzo, M. Aniska, T. L. Luckenbaugh, A. J. Roberts, A. Giri, K. A. Darling
Summary: This work characterizes the thermo-mechanical behavior of bulk nanocrystalline Cu-Ta alloys under extreme conditions. The experiments reveal that the alloys exhibit unique mechanical properties, behaving differently from conventional nanocrystalline Cu. They do not undergo grain coarsening during extrusion and exhibit behavior similar to coarse-grained Cu.
Article
Materials Science, Multidisciplinary
Yiqing Wei, Jingwei Li, Daliang Zhang, Bin Zhang, Zizhen Zhou, Guang Han, Guoyu Wang, Carmelo Prestipino, Pierric Lemoine, Emmanuel Guilmeau, Xu Lu, Xiaoyuan Zhou
Summary: This study proposes a new strategy to modify microstructure by phase regulation, which can simultaneously enhance carrier mobility and reduce lattice thermal conductivity. The addition of Cu in layered SnSe2 induces a phase transition that leads to increased grain size and reduced stacking fault density, resulting in improved carrier mobility and lower lattice thermal conductivity.
Article
Materials Science, Multidisciplinary
Jia Chen, Zhengyu Zhang, Eitan Hershkovitz, Jonathan Poplawsky, Raja Shekar Bhupal Dandu, Chang-Yu Hung, Wenbo Wang, Yi Yao, Lin Li, Hongliang Xin, Honggyu Kim, Wenjun Cai
Summary: In this study, the structural origin of the pH-dependent repassivation mechanisms in multi-principal element alloys (MPEA) was investigated using surface characterization and computational simulations. It was found that selective oxidation in acidic to neutral solutions leads to enhanced nickel enrichment on the surface, resulting in reduced repassivation capability and corrosion resistance.
Article
Materials Science, Multidisciplinary
X. Y. Xu, C. P. Huang, H. Y. Wang, Y. Z. Li, M. X. Huang
Summary: The limited slip systems of magnesium (Mg) and its alloys hinder their wide applications. By conducting tensile straining experiments, researchers discovered a rate-dependent transition in the dislocation mechanisms of Mg alloys. At high strain rates, glissile dislocations dominate, while easy-glide dislocations dominate at low strain rates. Abundant glissile dislocations do not necessarily improve ductility.
Article
Materials Science, Multidisciplinary
M. S. Szczerba, M. J. Szczerba
Summary: Inverse temperature dependences of the detwinning stress were observed in face-centered cubic deformation twins in Cu-8at.%Al alloy. The detwinning stress increased with temperature when the pi detwinning mode was involved, but decreased when the pi/3 mode was involved. The dual effect of temperature on the detwinning stress was due to the reduction of internal stresses pre-existing within the deformation twins. The complete reduction of internal stresses at about 530 degrees C led to the equivalence of the critical stresses of different detwinning modes and a decrease in the yield stress anisotropy of the twin/matrix structure.
Article
Materials Science, Multidisciplinary
Taowen Dong, Tingting Qin, Wei Zhang, Yaowen Zhang, Zhuoran Feng, Yuxiang Gao, Zhongyu Pan, Zixiang Xia, Yan Wang, Chunming Yang, Peng Wang, Weitao Zheng
Summary: The interaction between the electrode and the electric double layer (EDL) significantly influences the energy storage mechanism. By studying the popular alpha-Fe2O3 electrode and the EDL interaction, we find that the energy storage mechanism of the electrode can be controlled by modulating the EDL.
Article
Materials Science, Multidisciplinary
Matthew R. Barnett, Jun Wang, Sitarama R. Kada, Alban de Vaucorbeil, Andrew Stevenson, Marc Fivel, Peter A. Lynch
Summary: The elastic-plastic transition in magnesium alloy Mg-4.5Zn exhibits bursts of deformation, which are characterized by sudden changes in grain orientation. These bursts occur in a coordinated manner among nearby grains, with the highest burst rate observed at the onset of full plasticity. The most significant burst events are associated with twinning, supported by the observation of twinned structures using electron microscopy. The bursts are often preceded and followed by a stasis in peak movement, indicating a certain "birth size" for twins upon formation and subsequent growth at a later stage.
Article
Materials Science, Multidisciplinary
Vaidehi Menon, Sambit Das, Vikram Gavini, Liang Qi
Summary: Understanding solute segregation thermodynamics is crucial for investigating grain boundary properties. The spectral approach and thermodynamic integration methods can be used to predict solute segregation behavior at grain boundaries and compare with experimental observations, thus aiding in alloy design and performance control.
Article
Materials Science, Multidisciplinary
Feiyu Qin, Lei Hu, Yingcai Zhu, Yuki Sakai, Shogo Kawaguchi, Akihiko Machida, Tetsu Watanuki, Yue-Wen Fang, Jun Sun, Xiangdong Ding, Masaki Azuma
Summary: This study reports on the negative and zero thermal expansion properties of Cd2Re2O7 and Cd1.95Ni0.05Re2O7 materials, along with their ultra-low thermal conductivity. Through investigations of their structures and phonon calculations, the synergistic effect of local structure distortion and soft phonons is revealed as the key to achieving these distinctive properties.
Article
Materials Science, Multidisciplinary
Thomas Beerli, Christian C. Roth, Dirk Mohr
Summary: A novel testing system for miniature specimens is designed to characterize the plastic response of materials for which conventional full-size specimens cannot be extracted. The system has an automated operation process, which reduces the damage to specimens caused by manual handling and improves the stability of the test results. The experiments show that the miniature specimens extracted from stainless steel and aluminum have high reproducibility, and the results are consistent with those of conventional-sized specimens. A correction procedure is provided to consider the influence of surface roughness and heat-affected zone caused by wire EDM.
Article
Materials Science, Multidisciplinary
Rani Mary Joy, Paulius Pobedinskas, Nina Baule, Shengyuan Bai, Daen Jannis, Nicolas Gauquelin, Marie-Amandine Pinault-Thaury, Francois Jomard, Kamatchi Jothiramalingam Sankaran, Rozita Rouzbahani, Fernando Lloret, Derese Desta, Jan D'Haen, Johan Verbeeck, Michael Frank Becker, Ken Haenen
Summary: This study investigates the influence of film microstructure and composition on the Young's modulus and residual stress in nanocrystalline diamond thin films. The results provide insights into the mechanical properties and intrinsic stress sources of these films, and demonstrate the potential for producing high-quality nanocrystalline diamond films under certain conditions.