Article
Mechanics
Peixing Li, Tie-Jun Liu
Summary: The behavior of sliding friction on gradient nanostructured material coating is described in this study, considering the material gradient and size effect. A multi-layer couple stress elasticity model is proposed to simulate the coating with varying modulus. The sliding friction problem is analyzed using a singular integral equation and numerical methods, and the influence of characteristic material length, friction coefficient, and material gradient is investigated.
Article
Engineering, Geological
Jincheng Fan, Laurence Brassart, Wanqing Shen, Xiurun Ge
Summary: This paper presents an explicit formulation of the macroscopic strength criterion for porous media with spherical voids, providing an exact upper bound and a parametric estimate of the macroscopic strength profile under different loading conditions. The developed strength criteria are evaluated using finite-element numerical solutions, with a convenient heuristic strength criterion proposed for practical applications. Furthermore, the study addresses the impact of the ratio of matrix's eBCS to UCS on the macroscopic strength of porous media, highlighting the importance of considering distinct values of eBCS and UCS to avoid underestimation in high-pressure scenarios.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Martin Negyesi, Veronika Zakova, Vratislav Mares, Bohumir Strnadel, Valery Lacroix, Min-Jae Choi, Dongil Kwon
Summary: This study assesses the tensile properties of the nozzle to primary piping safe-end using instrumented indentation testing (IIT). Standard tensile tests and conventional hardness tests were performed to validate the results of IIT and estimate tensile properties, respectively. The results showed that IIT provided satisfactory agreement with the standard tensile tests and superior values compared to the hardness measurement. It was found that the highest deviation between IIT and tensile tests occurred in the weldment regions, and IIT was capable of measuring the variation of tensile properties across the pressure vessel nozzle to primary piping safe-end, providing more detailed distribution of mechanical properties without the need for specimen extraction.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Review
Materials Science, Multidisciplinary
Giuseppe Pintaude
Summary: Hardness is a critical property for evaluating material deformation behavior, especially in processes like heat treatment of metals. With the introduction of depth-sensing indentation, it is now possible to determine other mechanical properties. While recognized standards exist for evaluating Young's modulus through instrumented indentation, efforts continue to describe strength using hardness apparatus.
CRITICAL REVIEWS IN SOLID STATE AND MATERIALS SCIENCES
(2023)
Article
Engineering, Mechanical
J. Zhang, J. F. Shao, Q. Z. Zhu, G. De Saxce
Summary: A new homogenization model is developed for porous media, with a macroscopic fatigue criterion being established based on the variational principle. Dirac's measure is adopted to simplify the volume integral, showing the dependence of the plastic shakedown limit load on the invariants of the macroscopic stress tensor. The new criterion significantly improves the accuracy of plastic shakedown limit prediction for porous materials with large values of porosity.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Chemistry, Multidisciplinary
Kaushik Dey, Surojit Bhunia, Himadri Sekhar Sasmal, C. Malla Reddy, Rahul Banerjee
Summary: This study investigates the mechanical behavior of different types of COF thin films by controlling the internal order and self-assembly of building blocks, revealing that defect density and the nature of supramolecular interactions play a significant role in determining the stress-strain behavior of the films.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Qiang Zhao, Bin Tang, Hui Wan, Shiyi Luan, Pan Liu, Shengtao Yu, Fang Dong, Dong Chen, Chengqun Gui, Shengjun Zhou
Summary: In this study, an innovative and environmentally friendly method for preparing nanoporous silver materials using femtosecond laser was demonstrated. The yield strength of the nanoporous silver materials was found to increase monotonously with the increase of laser power, attributed to the decline of grain size and rise of relative density. The research not only proposes a new fabrication method for nanoporous silver materials, but also reveals the influence of fs laser power on their yield strength.
Article
Chemistry, Multidisciplinary
Shibani Mohata, Kaushik Dey, Surojit Bhunia, Neethu Thomas, E. Bhoje Gowd, Thalasseril G. Ajithkumar, C. Malla Reddy, Rahul Banerjee
Summary: Utilizing graphene as a grafting layer, a new method for preparing Janus-type COF-graphene thin films was proposed, demonstrating the fabrication of two distinct Janus-type films with heterogeneous surface morphologies and porosity.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Engineering, Geological
Chunjiang Zou, Xin Quan, Zhongjun Ma, Yanlong Zheng, Xiaobao Zhao, Jianchun Li, Jian Zhao
Summary: Mechanical excavation in hard or very hard rocks remains challenging, but reducing rock strength prior to excavation using microwave irradiation could increase efficiency and cost-effectiveness. This study showed that short microwave irradiation can significantly damage the rock, resulting in a reduction of uniaxial compressive strength, tensile strength, and indentation hardness. The reduction is more pronounced under dynamic loading compared to quasi-static loading. Microwaves have the greatest impact on tensile strength and the least impact on crack density. This study demonstrates the potential of microwave-assisted mechanical excavation for hard or very hard rocks.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Chemistry, Physical
Sungchul Kim, Miguel Cervera, Jian-Ying Wu, Michele Chiumenti
Summary: Strain localization analysis for orthotropic-associated plasticity in cohesive-frictional materials is conducted in this study, utilizing Maxwell's kinematics, the plastic flow rule, and boundedness of stress rates. The analysis compares different plasticity models and provides analytical results validated by numerical simulations, highlighting the influence of frictional behavior on the results.
Article
Materials Science, Multidisciplinary
R. Anand Sekhar, A. S. Shifin, N. Firoz
Summary: AlCoCrNiTi-C High Entropy Alloy processed through mechanical alloying and Spark Plasma Sintering shows a mixture of NiAl B2, Cr rich phase, and TiC. The alloy exhibits good room temperature and high temperature strength, with hardness primarily contributed by the NiAl phase.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Construction & Building Technology
Jian Ma, Gang Xu, Kai Wu, Chengji Xu, Yu Liu, Nanxi Dang, Qiang Zeng, Qing Lu
Summary: In this study, the impacts of lightweight ceramic sand (LCS) on cement grouts were investigated. The results showed that the partial replacement of quartz sand (QS) with LCS can alter the flowability, expansion, and compressive strength of the grouts. X-ray computed tomography (XCT) was used to quantify the structure and distribution of pores and LCS particles. The findings provide a reliable method for fabricating lightweight and high strength grouting materials and enhance the understanding of material heterogeneity in cement-based materials.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Review
Pharmacology & Pharmacy
Yoen-Ju Son, Danforth P. Miller, Jeffry G. Weers
Summary: This manuscript discusses strategies for achieving high total lung doses using spray-dried particles and a portable dry powder inhaler. It introduces the concept of product density and emphasizes maximizing packing density, drug loading, and aerosol performance. Spray drying at low rates with shell-forming excipients can lead to high-density particles, enabling ultrahigh TLD to be achieved.
Article
Materials Science, Multidisciplinary
Changzhi Zhao, Huajian Hu, Meizhen Zhuo, Chunying Shen
Summary: In this study, SBSC porous ceramics were prepared by mixing two different particle size of SiC powder and the properties of different SiC mixtures were investigated. The results showed that mixing an appropriate proportion of coarse and fine powder improved pore size distribution and significantly increased bending strength.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Materials Science, Multidisciplinary
Chunlei Zheng, Yupeng Zhang, Shuoyan Li, Peijun Zhang, Jinku Yu, Fucheng Zhang
Summary: The formation process of nanocrystalline layer on the rolling contact surface of bainitic steel was investigated. The results reveal that there is a cycle of nanocrystalline layer generation, spalling, and production on the surface. The decrease in the steel surface's elastic modulus indicates the initiation of fatigue damage.
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)