Article
Physics, Applied
Andrei Galiautdinov, Yiping Zhao
Summary: During the operation of a core-shell nanoparticle based localized surface plasmon resonance (LSPR) sensor, target molecules penetrate into the shell layer, resulting in nonuniform distribution of molecules or reactants. This phenomenon is observed in composition graded plasmonic particles, which exhibit different LSPR characteristics compared to uniform core-shell particles. A perturbation theory is developed to predict the LSPR properties of composition graded plasmonic particles, considering the effects of composition gradient caused by metal hydride, dielectric, and effective medium. The results demonstrate the tunability of LSPR peak location and amplitude by different configurations of the composition gradient. These findings are crucial for understanding the sensing performance of composition graded plasmonic particles and can be applied to other composition graded structures.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Ju Xue, Hak Yong Lee, Kevin J. Hemker, James K. Guest, Timothy P. Weihs
Summary: In this study, woven lattices with different materials were manufactured and selectively bonded to form composite lattices. The bonded lattices exhibited lower loss factors and higher elastic moduli compared to the unbonded lattices. The observed variations in properties can be attributed to wire rearrangement during deformation and can be controlled and optimized through material selection and bonding techniques.
MATERIALS & DESIGN
(2023)
Article
Physics, Applied
I. Khan, C. Howell, T. L. McGinnity, L. Li, R. K. Roeder, A. J. Hoffman
Summary: In this study, we demonstrate that the absorption spectrum of zinc oxide nanoparticles is influenced by nanoparticle morphology and anisotropy in the dielectric permittivity. We identify and characterize distinct modes in the absorption spectrum and show that their broadening and maxima are governed by the effects of anisotropy and interparticle coupling.
APPLIED PHYSICS LETTERS
(2023)
Article
Mathematics, Applied
R. H. W. Hoppe
Summary: This paper presents a space-time adaptive C-0 Interior Penalty Discontinuous Galerkin (C(0)IPDG) approximation method for the dynamic quasi-static von Karman equations, including homogeneous Dirichlet boundary conditions and an equilibrated a posteriori error estimator. The backward Euler scheme is used for time discretization, and the C(0)IPDG method is derived from a six-field formulation of the finite element discretized von Karman equations. The equilibrated a posteriori error estimator provides an upper bound for the discretization error in terms of associated energy functionals. It requires the construction of equilibrated fluxes and moment tensors computed on local patches around interior nodal points.
COMPUTERS & MATHEMATICS WITH APPLICATIONS
(2023)
Article
Physics, Fluids & Plasmas
Ya. I. Kolesnichenko, V. V. Lutsenko, A. V. Tykhyy
Summary: This study presents the first numerical observation of stochastic motion of 3.5-MeV alpha particles in a Helias reactor, validating the theory prediction. The study also suggests the possibility of preventing particle escape to the wall by optimizing the magnetic configuration.
PHYSICS OF PLASMAS
(2022)
Article
Engineering, Civil
Zhuo Tang, Wengui Li, Qi Peng, Libo Yan
Summary: This study investigates the cyclic behavior of geopolymeric composites confined by carbon fiber-reinforced polymer (CFRP) and provides valuable insights into their performance characteristics and key features of stress-strain curves.
JOURNAL OF COMPOSITES FOR CONSTRUCTION
(2023)
Article
Materials Science, Multidisciplinary
Xiang Li, Xinhui Fan, Bing Li, Xin Wang, Yanhong Li, Ke Yang
Summary: In this study, quasi-static and dynamic compression experiments were conducted on a Hf28Be18Ti17Zr17Cu7.5Ni12.5 high-entropy bulk metallic glass under different strain rates. It was found that the strain rate had limited influence on the fracture strength but caused plastic strain disappearance under quasi-static loading. The dynamic deformation behavior showed strain-rate softening, decreasing yield strength, and three distinct failure modes.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Engineering, Civil
S. K. Tak, M. A. Iqbal
Summary: The finite element computations were used to study the axial compression behavior of thin-walled metallic tubes under quasi-static and dynamic loading conditions in this research. Different geometric shapes of tubes demonstrate varied energy absorption and deformation characteristics under different loading conditions.
THIN-WALLED STRUCTURES
(2021)
Article
Computer Science, Interdisciplinary Applications
S. Diederichs, C. Benedetti, A. Huebl, R. Lehe, A. Myers, A. Sinn, J. -l. Vay, W. Zhang, M. Thevenet
Summary: In this work, the researchers present HiPACE++, a performance-portable, quasi-static, three-dimensional particle-in-cell code for modeling plasma accelerators. By decomposing the computation into 2D transverse operations and utilizing GPUs, HiPACE++ achieves significant speedups over CPU-only implementations. The code supports parallelization across multiple GPUs and is suitable for a wide range of computational devices.
COMPUTER PHYSICS COMMUNICATIONS
(2022)
Article
Engineering, Environmental
Kai Su, Tong Jin, Cai Hong Zhang, Shuai Yuan, Nian Wu Li, Le Yu
Summary: This study utilizes sub-nanometer confinement to encapsulate quasi-metallic Li in hard carbon in order to address the challenges faced in the commercial application of Li metal anodes. The resulting HC hybrid anode exhibits high Coulombic efficiency and cycling stability, offering a new approach for practical LMAs.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Yi-Yan Li, Chu-Yao Zhong, Mei-Xin Li, Qiao-Yi Zhang, Yibo Chen, Zhao-Qing Liu, Jin Zhong Zhang
Summary: The performance of photocatalytic reduction of Cr(vi) is improved by tuning the localized surface plasmon resonance (LSPR) of W18O49 nanostructures through morphology control. The blue shift and intensity increase of the corresponding LSPR bands are attributed to morphology changes from nanowires to nanobundles and urchin-like nanospheres, resulting in enhanced photocatalytic activity.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Mathematics, Applied
Marco Bonacini, Sergio Conti, Flaviana Iurlano
Summary: In this paper, a notion of irreversibility for crack evolution in the presence of cohesive forces is proposed, allowing for different responses in loading and unloading processes. Motivated by a variational approximation with damage models, its applicability to constructing quasi-static evolution in a simple one-dimensional model is investigated. The cohesive fracture model arises naturally via Gamma-convergence from a phase-field model of the generalized Ambrosio-Tortorelli type, which can be used as regularization for numerical simulations.
ARCHIVE FOR RATIONAL MECHANICS AND ANALYSIS
(2021)
Article
Mechanics
Guohua Zhu, Dawei Wen, Lulu Wei, Zhen Wang, Xuan Zhao
Summary: This study introduces a new lattice structure called cosine function cell-based (CFCB) lattice, which shows superior performance in terms of compressive stiffness, strength, and energy absorption compared to traditional body-centered cubic (BCC) lattice structures. The influences of key parameters such as cell rod diameter and cosine function period length on mechanical performances are investigated experimentally and numerically. The results indicate that CFCB lattice structures have higher energy absorption characteristics and plateau stress with increasing cell rod diameter and period length. Theoretical models are also proposed to predict the equivalent elastic modulus, Poisson's ratio, and plateau stress for CFCB lattice structures based on collapse mechanisms of the typical unit cell.
COMPOSITE STRUCTURES
(2023)
Article
Materials Science, Ceramics
Tao-Hsing Chen, Chi-Feng Lin, Jian-Yu Wang
Summary: The glass-forming ability, stress-strain relationships, and fracture characteristics of Zr60-xCu27Al8Fe5Yx (x =1, 3 and 5 at%) bulk metallic glasses are studied under compressive strain rates ranging from 10-3 to 4 x 103 s^-1. Yttrium addition broadens the supercooled liquid region and increases the γ parameter, especially for x = 1 at%. Fracture stress increases with increasing strain rate for all tested alloys, while fracture strain decreases. Addition of 3 at% Y results in the highest fracture stress and improved fracture strain. Fracture behavior is primarily influenced by strain rate, while Y content has a minor role.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Engineering, Aerospace
Hangyue Zhang, Rong Cai, Yanchu Yang, Rong Zhao
Summary: This paper conducts numerical simulation of the ground dynamic launching process for a high-altitude balloon system under the quasi-static assumption, revealing rich mechanical and geometric behaviors. The study includes solution of bubble shapes, kinematic analysis, and static model of membrane bundle system, providing insights for actual high-altitude balloon ground dynamic launching testing.
AEROSPACE SCIENCE AND TECHNOLOGY
(2021)
