Article
Materials Science, Multidisciplinary
M. Mueller, C. C. Labisch, L. Gerdt, L. Bach, M. Riede, J. Kaspar, E. Lopez, F. Brueckner, M. Zimmermann, C. Leyens
Summary: Laser-based direct energy deposition (L-DED) with blown powder allows for additive multimaterial manufacturing and rapid alloy development. The research presents the development of an automated multimaterial deposition process and the investigation of alloy compositions within the Al-Ti-Co-Cr-Fe-Ni HEA system using up to four powder feeders.
JOURNAL OF LASER APPLICATIONS
(2023)
Article
Mechanics
S. A. Santos, C. H. Daros
Summary: In this study, three-dimensional crack problems in viscoelastic isotropic exponentially graded solids were investigated using the boundary element method, showing the effects on stress intensity factors, crack opening displacements, and energy release rates in practical fracture problems.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Mechanics
Igor M. Carraretto, Crystal E. Owens, Gareth H. McKinley
Summary: Aqueous foams play an important role in reducing liquid loading in the oil and gas industry. This study presents a new experimental setup for advanced rheometry and investigates the rheological evolution of foams by measuring bubble size distribution and time-resolved rheological properties. The findings contribute to understanding the main rheological characteristics of foams.
Article
Chemistry, Physical
Ying Ding, Wei Zheng, Yanming Zhu, Mingge Jin, Feng Huang
Summary: Integrated optics has great potential in various fields, with tunable laser technology playing a key role in achieving on-chip optical integration. Raman scattering is a competitive method for transferring incident laser energy to optical phonons. By using hexagonal boron nitride as the energy conversion medium and angle-resolved polarized Raman spectroscopy, continuous wavelength tuning has been successfully achieved.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Physical
C. Y. Fu, Y. Yang, Y. R. Zhou, C. Z. Shi, P. H. Wen
Summary: This paper presents the application of the strong-form finite block method (FBM) to three-dimensional fracture analysis with functionally graded materials. The main idea of the strong-form FBM is to transform the arbitrary physical domain into a normalized domain and use the direct collocation method to form a linear system. By using the mapping technique, partial differential matrices of any order can be constructed directly. The accuracy and efficiency of the strong-form FBM are demonstrated through several numerical examples.
Article
Chemistry, Physical
Bowen Han, Mingyuan Sun, Ying Chang, Saisai He, Yuqi Zhao, Chuanyong Qu, Wei Qiu
Summary: In this work, a theoretical model of stress characterization for GaN was developed using polarized micro-Raman spectroscopy based on elasticity theory and lattice dynamics. The model can provide a quantitative relationship between all components of the in-plane stress tensor and the measured Raman shift. By combining the stress characterization model with the expanding cavity model, the in-plane residual stress component field around Berkovich indentation on the (0001) plane GaN was achieved. The experimental results showed that the distributions of the stress components were significantly different from the distribution of the Raman shift and had a gradient along each crystal direction, closely related to the GaN crystal structure.
Article
Engineering, Mechanical
Jinlong Cao, Kunpang Kou, Chichiu Lam
Summary: This study presents an approach using a modified M-integral to determine stress intensity factors of cracked functionally graded titanium alloy (FGTA) components, taking into account the effect of varying elastic moduli. Experimental results and simulations using 3D printed FGTA specimens verify the validity of the modified M-integral method. The study investigates the effects of controlled changes in material properties on crack propagation through resistance tests and fatigue crack propagation simulations.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2021)
Article
Mechanics
Xiao-Guang Yue, Saeid Sahmani, Wei Huang, Babak Safaei
Summary: This study introduces a three-dimensional plate model with nonlinear Green-Lagrange strain tensor to analyze the geometrical nonlinear oscillations of functionally graded carbon nanotube (FG-CNT)-reinforced nanocomposite plates with dissimilar geometries and inconstant thickness. Different patterns of CNT reinforcement decorations are used, and their mechanical characteristics are analyzed. The results show that the role of CNT volume fraction becomes more significant when the thickness variability venture changes from convex to concave.
Article
Chemistry, Multidisciplinary
Yiming Li, Yuan Li, Xiaoxuan Luo, Chaowei Guo, Yuanbin Qin, Hongbing Fu, Yanpeng Zhang, Feng Yun, Qing Liao, Feng Li
Summary: The emergent optical activity caused by anisotropic light emitter in microcavities leads to Rashba-Dresselhaus photonic spin-orbit coupling. This study shows a contrast in the roles of emergent optical activity in free and confined cavity photons, observed through polarization-resolved white-light spectroscopy. The results provide significant additions to the field of cavity spinoptronics and offer a new method for manipulating photonic spin-orbit coupling in confined optical systems.
Article
Engineering, Mechanical
Qiang Yu
Summary: This paper investigates large deflection bending analysis of a variable-thickness tapered plate under hygrothermal stresses, modifying the formulation and using a unified wavelet solving methodology to obtain highly accurate solutions. The results indicate that the tapered ratios and profiles' polynomial orders significantly influence the bending characteristics of the variable-thickness tapered plate in a hygrothermal environment.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Chemistry, Multidisciplinary
Zhengfeng Guo, Honggang Gu, Mingsheng Fang, Lei Ye, Shiyuan Liu
Summary: Tellurene's giant in-plane optical anisotropy can be quantitatively evaluated using imaging Mueller matrix spectroscopic ellipsometry and first-principles calculations, and it is connected to its low-symmetry lattice structure and electrical anisotropy. This work provides a general and quantitative way to explore optical anisotropy and helps in understanding the relationship between lattice structure and optical anisotropy, thus promoting the development of polarization-sensitive optical applications.
Article
Computer Science, Interdisciplinary Applications
Lingjiao Fan, Saeid Sahmani, Babak Safaei
Summary: This paper examines the size-dependent dynamic stability of axially loaded functionally graded composite truncated conical microshells, considering magnetostrictive facesheets and nonlinear viscoelastic foundations. The study reveals that the significance of couple stress type of size dependency on frequency increases from prebuckling to postbuckling domain, while an increase in material gradient index decreases its importance. Additionally, applying positive and negative magnetic fields to the microshells results in frequency changes at specific axial load values in prebuckling and postbuckling domains.
ENGINEERING WITH COMPUTERS
(2021)
Article
Computer Science, Interdisciplinary Applications
Junpeng Wang, Jun Wu, Ruediger Westermann
Summary: The optimization of porous infill structures via local volume constraints is popular, but convergence can be slow or fail in some situations. The issue is related to the topology of the stress tensor field, and an automatic initialization process is proposed to improve convergence rates.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2022)
Article
Mechanics
Kei Saito, Tei Hirashima, Ninshu Ma, Hidekazu Murakawa
Summary: A practical and reliable characteristic-tensor method (CTM) has been proposed for evaluating stress-intensity factors (SIFs) of various types of three-dimensional cracks. Using finite-element analysis, even with a relatively coarse mesh, accurate estimates of SIFs for mixed-mode crack problems can be obtained by the CTM. The results demonstrate that the CTM is a valuable approach for estimating SIFs of 3D cracks important for industrial applications.
ENGINEERING FRACTURE MECHANICS
(2021)
Review
Chemistry, Multidisciplinary
Steven R. Kirk, Samantha Jenkins
Summary: The majority of literature in chemistry uses scalar measures to describe fundamental chemical and physical phenomena, despite the limitations of scalar-based considerations. This study proposes a solution to this problem by introducing the vector-based and full symmetry-breaking nature of next generation quantum theory of atoms in molecules. The paper discusses the connection with experiments on neutral chiral molecules and provides non-energy-based explanations for various phenomena.
CHEMICAL SOCIETY REVIEWS
(2023)