Review
Engineering, Geological
Wuyu Zhang, Xiongyu Tang, Xiaohui Sun, Ruochen Yang, Guoqing Tong, Jun Guo
Summary: The study developed a mechanistic-empirical method to analyze the improvement of roadway performance using a multi-layered elastic geosynthetic-stabilized soil system. This method can quantitatively measure the benefit of wicking geosynthetics in stabilizing roadways, and separate the contributions from the reinforcing effect and the wicking effect. The wicking effect contributed 18-30%, while the reinforcing effect contributed 8-11% when placing the geosynthetic at the interfaces.
GEOTEXTILES AND GEOMEMBRANES
(2023)
Article
Mathematics, Applied
C. W. Sahabandu, M. Dewasurendra, Z. A. M. S. Juman, K. Vajravelu, Ali J. Chamkha
Summary: In this paper, a semi-analytical method called MDDiM is developed and applied to solve the problem of harmonic wave propagation in nonlinear generalized thermo-elasticity. By varying the magnetic field, relaxation time, and rotation, approximate solutions for the displacement and temperature fields are obtained and presented graphically. The new extended MDDiM method outperforms the existing OHAM with minimum error and faster convergence rate.
COMPUTERS & MATHEMATICS WITH APPLICATIONS
(2022)
Article
Mechanics
Xin Feng, Zhiming Hu, Han Zhang, Liangliang Zhang, Yang Gao
Summary: In this paper, the static solution of functionally gradient multilayered cubic quasicrystal plates on an elastic foundation with mixed boundary conditions is studied using a semi-analytical method. The influence of different boundary conditions, stacking sequence, foundation parameters, and functionally gradient exponential factors on the phonon and phason variables is analyzed.
Article
Chemistry, Multidisciplinary
Robert C. Davey, Raphael C. Assier, I. David Abrahams
Summary: This paper investigates the reflection of Lamb waves from a free edge perpendicular to the center line of an elastodynamic plate. The results show that the new solution method accurately represents the near-field and far-field behavior, requiring only a small number of Lamb wave and corner modes.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Civil
Fang Li, Jun Wu, Freydoon Arbabi, Shanhong Liu
Summary: This paper presents a solution procedure for cable configurations using a semi analytical method. It is rigorous and efficient, suitable for various loads and initial configurations, and can be used for parameter studies in the design and construction processes.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Geological
Ngurah Beni Setiawan, Robert W. Zimmerman
Summary: Borehole breakout initiation, progression, and stabilization are modeled using a semi-analytical method. The study finds that the stress evolution around the flank of the breakout helps explain why the breakout width remains relatively constant during the process. The simulation results are validated with experimental data and correlations between breakout geometry, rock strength properties, and in situ stress are established. The paper concludes with a critical discussion on inferring the in situ stress state from observed breakout geometries.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Optics
Mostafa Shabani, Gholamreza Karimi
Summary: In this article, a new semi-analytical method is proposed to design metamaterial perfect absorbers (MPAs) that can be used for designing both broadband and multiband absorbers. The method is based on the analysis of the absorption mechanism and a local search genetic algorithm, and it shows favorable performance for both TE and TM polarization.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Mechanics
Aalokeparno Dhar, I. R. Praveen Krishna
Summary: The synchronization pattern of coupled pendulums is crucial in the design of pendulum energy harvesters. This paper introduces a multi-harmonic energy balance method to evaluate the synchronization nature of the system and validates it in different scenarios.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2022)
Article
Materials Science, Ceramics
R. Podor, X. Le Goff, J. Lautru, H. P. Brau, M. Massonnet, N. Clavier
Summary: The SEraMic method, implemented in the SEraMic plugin for Fiji or ImageJ software, is used to calculate a segmented image of ceramic cross sections that shows grain boundaries. It accurately determines grain boundary positions and evaluates grain size distribution in various materials, remaining easy to use and accurate when the average grain diameter is greater than or equal to 0.25 µm.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Mathematics, Applied
Sangbeom Park, Soyoon Bak, Philsu Kim, Yunchang Seol
Summary: In this paper, an efficient and stable method called reduced immersed boundary method (rIBM) is proposed for solving the interaction problems between bulk fluid and elastic interface. The method employs an iteration free semi-Lagrangian method in Navier-Stokes equation and treats the elastic force semi-implicitly in immersed boundary formulations. Furthermore, a novel approach is used to transform the original linear system into a reduced block matrix system, which improves the numerical stability and computational efficiency.
APPLIED MATHEMATICS AND COMPUTATION
(2023)
Article
Engineering, Multidisciplinary
Wanyou Yang, Qinghua Zhou, Jiaxu Wang, Boo Cheong Khoo, Nhan Phan-Thien
Summary: In this paper, a semi-analytical method (SAM) is developed to address material mismatch in a welding repaired material, modeling the heterogeneous welding bead and determining stress field by iteratively calculating eigenstrains. The SAM can analyze the influences of material properties, aspect ratio, angle of differently shaped welding bead, and interactions among multiple welding beads on stress distribution.
APPLIED MATHEMATICAL MODELLING
(2021)
Article
Mathematics, Applied
Agustin Hernandez Rocha, Damian H. Zanette, Marian Wiercigroch
Summary: This article proposes a semi-analytical method to investigate the dynamics and bifurcation scenarios of piecewise linear oscillators. The method is based on a mapping technique with a matrix structure that allows easy and rapid construction of any periodic orbit. When validated against direct numerical integration simulations, a good correlation and an accurate prediction of bifurcation phenomena were shown.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2023)
Article
Acoustics
Yong-Sheng Lian, Xue Li, Jun-Yi Sun, Xiao-Ting He, Zhou-Lian Zheng
Summary: This study focuses on the free vibration analysis of semi-closed shells of revolution with variable curvature and presents an analytical solution for the natural frequency. By approximating the shell into a series of small shell segments, the analytical solutions for the natural frequencies of these segments are derived. The reliability of the analytical solution is verified through experimental confirmation.
JOURNAL OF VIBRATION AND CONTROL
(2023)
Article
Engineering, Electrical & Electronic
Mohammad Zoofaghari, Hamidreza Arjmandi, Ali Etemadi, Ilangko Balasingham
Summary: Channel modeling is a crucial step in the development of diffusion-based molecular communication networks. This paper proposes a new method based on concentration Green's function, utilizing a semi-analytical approach to model channels in DMCNs with multiple transmitters, receivers, and other objects. Experimental results confirm the accuracy and efficiency of the proposed method, showing high convergence and computational performance.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2021)
Article
Engineering, Mechanical
Zhen Liu, Fucai Li, Zhongting Xu, Qinghao He
Summary: This paper presents a semi-analytical method for loaded tooth contact analysis (LTCA) in analyzing the meshing of spiral bevel gears. The method combines analytical formulas with finite element analysis (FEA) results to calculate tooth deformation and contact force. An optimization model is used to find the potential contact points, and a contact judgement strategy is proposed to detect contact at the ends of contact curves. The accuracy and efficiency of the method are demonstrated through a numerical instance under different load torques, and its ability to analyze gears with local defects or cracks is highlighted.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Review
Materials Science, Multidisciplinary
Chaitanya S. Deo, Elton Y. Chen, Remi Dingeville
Summary: This review explores the application of atomistic modeling techniques in simulating radiation damage in crystalline materials. The formation of defects is a result of radiation damage caused by energetic particles. The subsequent evolution of these defects at various length and time scales requires the use of different simulation techniques to model their diverse behaviors. This work focuses on current and new methodologies at the atomistic scale in investigating the mechanisms of defect formation at the primary damage state.
MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Scott Monismith, Jianmin Qu, Remi Dingreville
Summary: In this study, atomistic simulations were used to investigate the mechanisms and key fracture properties associated with intergranular fracture in Li7La3Zr2O12 (LLZO) grain boundaries. The results showed that the sigma 5(310) grain boundary exhibited brittle fracture behavior, and the fracture properties decreased as the temperature increased. Two temperature-dependent Li clustering regimes were predicted as the crack propagated.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
Alejandro Barrios, James E. Nathaniel, Joseph Monti, Zachary Milne, David P. Adams, Khalid Hattar, Douglas L. Medlin, Remi Dingreville, Brad L. Boyce
Summary: In this study, a new methodology for the fabrication of gradient nanostructured metals via compositional means was developed. By controlling both the alloying elements and the spatially graded grain size distributions, the microstructural stability and ductility of nanocrystalline metals were improved. This fabrication method offers an alternative approach for developing the next generation of microstructurally stable gradient nanostructured films.
Article
Materials Science, Multidisciplinary
Joseph M. Monti, James A. Stewart, Joyce O. Custer, David P. Adams, Diederik Depla, Remi Dingreville
Summary: We propose a generalized multi-phase-field model for predicting the growth of polycrystalline thin films fabricated by physical vapor deposition. This model considers the explicit transport of atomic species to the substrate and the competing diffusion processes on the surface and in the bulk of the film, leading to the formation of films with specific microstructures. Using Monte Carlo simulations with the SiMTRA code, we calculate the energy and direction of arriving atoms at the substrate under magnetron sputtering conditions. Our simulation results agree with the transmission electron microscopy characterization of sputtered films and provide insights into the complex relationships between deposition conditions and bulk and surface morphologies.
Article
Chemistry, Physical
Remi Dingreville, Daniel Vizoso, Ghatu Subhash, Krishna Rajan
Summary: Vibrational spectroscopy is a nondestructive technique used in chemical and physical analyses to determine atomic structures and properties, but evaluating and interpreting spectroscopic profiles based on identifiable peaks can be difficult. To address this challenge, we present a reliable protocol based on supervised manifold learning techniques to connect vibrational spectra to diverse atomic structure configurations.
CHEMISTRY OF MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Jacob Startt, Mohammed Quazi, Pallavi Sharma, Irma Vazquez, Aseem Poudyal, Nathan Jackson, Remi Dingreville
Summary: The increasing demand for high-performance piezoelectric materials has led to a search for better alternatives to the widely used lead zirconate titanates (PZT) due to their toxicity and thermal stability issues. Doping aluminum nitride (AlN) with scandium (Sc) significantly improves its piezoelectric response. However, the high cost and challenges in fabricating stable films with rare-earth dopants limit their industrial applications. This study combines ab initio calculations with fabrication and experimentation to identify earth-abundant dopants for AlN, and finds that titanium, zirconium, and hafnium induce large piezoelectric enhancements comparable to Sc. This work provides a sustainable and affordable path for the development of next-generation electronics.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Chongze Hu, Stephane Berbenni, Douglas L. Medlin, Remi Dingreville
Summary: Twinning is a common deformation mechanism in nanocrystalline metals, and solute segregation at twin boundaries plays a vital role in their stability and strengthening. This study reveals a possible discontinuity of solute segregation patterns across a disconnection defect in a wide range of binary alloys. The change in segregation pattern is attributed to the break of local symmetry caused by the disconnection terraces. These findings enhance our understanding of interface segregation phenomena and emphasize the importance of interfacial defects in alloy design.
Article
Chemistry, Physical
Scott Monismith, Jianmin Qu, Remi Dingreville
Summary: In this paper, phase-field simulations are used to investigate fracture and short circuit issues in the Li7La3Zr2O12 (LLZO) solid electrolyte. The study reveals that in the presence of a single crack, the crack propagation threshold exhibits inverse square root scaling with respect to crack length, while the short-circuit potential scales linearly with crack length. For multiple cracks, failure follows the Weibull model, and higher crack density favors failure at lower overpotentials. Additionally, the use of flawless interfacial buffers mitigates failure and allows for larger sustained currents without reaching unstable overpotentials.
JOURNAL OF POWER SOURCES
(2023)
Article
Nanoscience & Nanotechnology
Daniel Vizoso, Chaitanya Deo, Remi Dingreville
Summary: Phase transformations in nanowires induced by external stimuli can be stable under tension and reversible under compressive strain. The recovery of these phase transformations under tensile strain is possible. The stability, reversibility, and recovery of this phase transformation are related to the yielding mechanism and the residual stacking faults and twinning defects.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
Dongil Shin, Ryan Alberdi, Ricardo A. Lebensohn, Remi Dingreville
Summary: Recent developments in micromechanics and neural networks have provided promising paths for accurately predicting the response of heterogeneous materials. The deep material network, with its multi-layer design and trained micromechanics building blocks, offers the ability to extrapolate material behavior to different constitutive laws without retraining. However, the random initialization of network parameters in current training methods leads to unavoidable errors. In this study, we propose a visualization technique using an analogous unit cell to initialize deeper networks and improve the accuracy and calibration performance, while also providing a more intuitive representation of the network for explainability.
NPJ COMPUTATIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Saaketh Desai, Ankit Shrivastava, Marta D'Elia, Habib N. Najm, Remi Dingreville
Summary: This study investigates and discusses the ability of various linear and nonlinear dimensionality reduction methods to quantify and characterize microstructure evolution, providing considerations and guidelines for choosing dimensionality reduction methods in materials problems involving high dimensional data.
Review
Materials Science, Multidisciplinary
Chongze Hu, Remi Dingreville, Brad L. Boyce
Summary: Most materials, including metals, alloys, ceramics, and composites, are polycrystalline and have grain boundaries that affect their properties. The presence of intentional solutes or impurities near the grain boundaries can influence their behavior and stability. Advanced electron microscopy techniques allow researchers to directly observe grain boundary structures and segregation. However, computational modeling techniques are indispensable for understanding the underlying mechanisms of grain boundary segregation.
COMPUTATIONAL MATERIALS SCIENCE
(2024)
Article
Chemistry, Physical
Ryan M. Khan, Martin Rejhon, Yanxiao Li, Nitika Parashar, Elisa Riedo, Ryan R. Wixom, Frank W. DelRio, Remi Dingreville
Summary: As the field of low-dimensional materials continues to grow, there is a need for techniques to characterize the mechanical properties of these materials at the nanoscale. This paper presents a modulated nanomechanical measurement technique based on atomic-force microscopy, which enables non-destructive measurements of the elasticity of ultra-thin materials with high resolution. The technique is used to study the stiffness dependence of graphene thin films and discover a peak transverse modulus in two-layer graphene.
Article
Materials Science, Multidisciplinary
James A. Stewart, Jacob K. Startt, Remi Dingreville
Summary: Through atomistic simulations, this study investigates the dynamic properties and equation-of-state of the Cantor alloy under shock-loading conditions. The role of local phase transformations and the alloy's high spall strength are revealed. The results validate the predictability of the model and provide insights for further advancements in applications of this alloy under extreme environments.
MATERIALS RESEARCH LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Timothy A. Elmslie, Jacob Startt, Yang Yang, Sujeily Soto-Medina, Emma Zappala, Mark W. Meisel, Michele Manuel, Benjamin A. Frandsen, Remi Dingreville, James J. Hamlin
Summary: Magnetic properties of Cantor alloy samples with varying composition were investigated using magnetometry and muon spin relaxation. Two transitions were observed: a spin-glass-like transition between 55 K and 190 K depending on composition, and a ferrimagnetic transition at approximately 43 K in multiple samples. The magnetic signatures at 43 K were not affected by chemical composition. The effective magnetic moment decreased with increasing Cr or Mn concentrations and increased with decreasing Fe, Co, or Ni concentrations. The results provide insights into controllable tuning of the magnetic properties of Cantor alloy variants.