Article
Mechanics
Dong-Liang Sun, Xue-Yang Zhang, Xian-Fang Li
Summary: This paper presents a theoretical analysis of the interaction of multiple parallel cracks in a pre-stressed orthotropic elastic material. The pseudo-traction method and complex potential method are applied to solve the problem. The results show that the pre-stress has little influence on the stress intensity factors when two cracks are collinear or far away from each other, but it affects the stress intensity factors for closer cracks under different loading conditions.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2022)
Article
Computer Science, Interdisciplinary Applications
Manoj Kumar Singh, Amit Kumar Rahul, Sandip Saha, Sourabh Paul, Ravi Tiwari, Susmay Nandi
Summary: The aims of this research are to study the phenomena of generalized Rayleigh waves in composite structures with piezoelectric material and corrugated surfaces. The research provides expressions for the displacement potential function for both the elastic substrate and the piezoelectric layer by solving the electromechanical field equations. The frequency equations of the studied wave have been discovered as determinants for electrically open and short conditions.
INTERNATIONAL JOURNAL OF MODERN PHYSICS C
(2023)
Article
Construction & Building Technology
Zhiheng Ma, Wan Hong
Summary: This article presents a strategy for estimating distributed displacement of pre-stressed concrete beams with random cracks based on long-gauge strain sensing. The method relies on collected strain responses and material parameters, and is independent of external load. Experimental results show that neglecting random cracks leads to large relative error in estimated displacement, while taking the influence of random cracks into account results in good agreement with directly monitored displacement. The presented strategy without the necessity of reference point could be an alternative for displacement monitoring of pre-stressed structures.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
A. Mocci, J. Barcelo-Mercader, D. Codony, I Arias
Summary: Through appropriate geometric design, this study introduces a class of low area-fraction, bending-dominated metamaterials that exhibit apparent piezoelectricity even when the base material is not piezoelectric. The research quantifies the apparent piezoresponse and characterizes how lattice geometry, orientation, feature size and area fraction affect it. The work provides guidelines for endowing any dielectric metamaterial with apparent piezoelectricity, leading to non-toxic, environmentally friendly, and biocompatible materials for electromechanical transduction.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2021)
Article
Mechanics
Hao Yu, Ji Lin
Summary: In this paper, the generalized finite difference method (GFDM) is used to study antiplane piezoelectricity problems with multiple inclusions. The applicability and validity of the proposed method are verified through the analysis of numerical examples.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2022)
Article
Acoustics
Alan Muhafra, Majd Kosta, Daniel Torrent, Rene Pernas-Salomon, Gal Shmuel
Summary: Homogenization theories simplify the constitutive description of heterogeneous media, while retaining their macroscopic features; The Willis theory predicts the strain-momentum coupling in elastodynamic metamaterials; A recent theory predicts analogous electro-momentum coupling in piezoelectric metamaterials.
Article
Engineering, Multidisciplinary
Abdulla Abakarov, Yulia Pronina, Mark Kachanov
Summary: Perturbations of symmetric crack configurations result in mixed-mode conditions at crack tips, leading to increased stress intensity factors and energy release rates. The effect of perturbations on crack kinking and its relation to crack avoidance and coalescence problems are discussed.
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
(2022)
Article
Engineering, Civil
Youqi Zhang, Yasunori Miyamori, Takanori Kadota, Takehiko Saito
Summary: The dynamic properties of civil structures are important for evaluating their health condition, but they can be influenced by environmental effects, leading to inaccurate structural health assessment. This paper investigates the environmental effect on the dynamic parameters of a ballasted bridge through a series of vibration experiments on a pre-stressed concrete beam railway bridge. The results show a clear seasonal variation in natural frequencies, while damping ratios do not exhibit a consistent pattern. Compression tests on the concrete slab indicate no significant degradation of compression strength after over 4 decades of service.
Article
Engineering, Geological
Kezhong Wang, Yufei Zhao, Zhangge Hu, Yong Nie
Summary: This study conducted shear tests on pre-stressed anchor blocks containing structural planes using a large-scale model test bench. A spiral structure model of composite steel wires was constructed using the software ABAQUS 2020 to accurately simulate the interaction, failure modes, and mechanical mechanisms between the anchor cable and grouting body, as well as between the grouting body and concrete block. The results revealed the alternating change process of shear stress and the fracture patterns of the anchor cable.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Physics, Applied
Xinxin Wang, Gaojie Li, Haobo Liu, Wenyu Shi, Xiaohong Li, Jianguo Wan
Summary: The study shows that aMoSTe nanoribbons exhibit direct bandgap and magnetism under internal strain, with oscillation behavior of bandgaps, magnetic moments, and piezoelectric coefficients with increasing width, and the in-plane piezoelectric coefficient is dependent on edge type. Under external strain, changes in bandgap, magnetic moment, and polarization are solely influenced by the external strain, showing an increase in in-plane polarization with parabolic behavior.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Engineering, Civil
Reem Abdul-Rahman, Dominique Saletti, Pascal Forquin
Summary: In this research, the static and dynamic shear strength of concrete was investigated using PTS tests, which apply axial load to generate shear stresses in the ligament of the sample. The results showed that shear strength is sensitive to water content and loading rate.
ENGINEERING STRUCTURES
(2021)
Article
Mechanics
Zelin Liu, Chunde Ma, Xin'ao Wei, Weibin Xie
Summary: The presence of cracks had a weak effect on the strength of sandstone specimens during direct tensile testing (DTT) and uniaxial compression testing (UCT). However, the strengths of the specimens increased gradually with different crack inclinations (fi). The elastic modulus of rock increased with an increase in fi during UCT, while it remained almost unchanged during DTT.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Mechanics
Dianrui Mu, Haigang Qu, Yusheng Zeng, Aiping Tang
Summary: An improved Smooothed Particle Hydrodynamics (SPH) method is proposed to simulate the failure process of rock samples with pre-existing cracks under compression loads. The method captures the brittle fracture characteristics of rock materials by improving the kernel function of SPH. It utilizes a prefabricated node segment (PNS) method to generate complex cracks and applies the tension instability control (TIC) technique to enhance numerical stability.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Acoustics
Saeed Lotfan, Bekir Bediz
Summary: In this study, the stiffening/softening effects in the vibrations of rotating pre-twisted blades are accurately modeled by including geometrically nonlinear terms in the static analysis. Numerical analysis reveals that the presence of nonlinear terms leads to extremely lower natural frequencies of the blades.
JOURNAL OF SOUND AND VIBRATION
(2022)
Article
Biophysics
Zhiyuan Zhou, Jie Wang, Jiamin Zhang, Xiyue Duan, Weiming Lin, Kui Cheng, Wenjian Weng, Zuobing Chen
Summary: The surface potential of biomaterials is crucial for wound healing. This study investigated the effect of surface potential on wound healing by preparing poly(vinylidenefluoride-co-trifluoroethylene) (P(VDF-TrFE)) films with different surface potentials and piezoelectric responses. The results revealed that electric polarization promotes the crystallization of the beta phase of P(VDF-TrFE) and high surface potential enhances protein adsorption, fibroblast proliferation, and macrophage polarization. In vivo experiments further demonstrated that high voltage polarized P(VDF-TrFE) films can generate a higher dynamic potential and significantly promote wound healing compared to the control group. Overall, this study provides insights into designing wound healing materials with similar properties.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2023)
Article
Physics, Multidisciplinary
Vijay K. Yadav, Rakesh Kumar, A. Y. T. Leung, Subir Das
CHINESE JOURNAL OF PHYSICS
(2019)
Article
Computer Science, Interdisciplinary Applications
Shubham Jaiswal, Manish Chopra, S. Das
MATHEMATICS AND COMPUTERS IN SIMULATION
(2019)
Article
Mathematics, Applied
Anup Singh, Manish Chopra, Subir Das
MATHEMATICAL METHODS IN THE APPLIED SCIENCES
(2019)
Article
Computer Science, Artificial Intelligence
Rakesh Kumar, Subir Das
NEURAL COMPUTING & APPLICATIONS
(2020)
Article
Mathematics, Applied
Sachin Kumar, Prashant Pandey, Subir Das
COMPUTATIONAL & APPLIED MATHEMATICS
(2019)
Article
Mathematics, Applied
Rakesh Kumar, Subir Das
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2020)
Article
Computer Science, Artificial Intelligence
Rakesh Kumar, Subir Das, Yang Cao
Article
Mathematics, Applied
A. Singh, S. Das, H. Altenbach, E. -M. Craciun
ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK
(2020)
Article
Computer Science, Artificial Intelligence
Dhawan Sanjeev, Kulvinder Singh, Eduard-Marius Craciun, Adrian Rabaea, Amit Batra
Summary: In modern times, next-cart recommendation (NCR) has become a dominant topic in e-commerce research, utilizing recurrent neural networks (RNNs) for recommendation and sequential modeling. However, existing methods fail to fully exploit the significant signals present in personalized product frequency (PPF) information.
NEURAL PROCESSING LETTERS
(2023)
Article
Mathematics, Applied
Sanjeev Dhawan, Kulvinder Singh, Adrian Rabaea, Amit Batra
Summary: The system employs a novel encoder decoder prototype named SRec which utilizes a space filling approach to incorporate future information and improve recommendation quality. By utilizing a convolutional neural network (CNN) for efficiency and accuracy, the system can predict missing items based on incomplete sequences, tested on real world datasets, and including short, medium and long sequences.
ANALELE STIINTIFICE ALE UNIVERSITATII OVIDIUS CONSTANTA-SERIA MATEMATICA
(2021)
Article
Engineering, Mechanical
Anup Singh, S. Das, S. H. Ong, H. Jafari
JOURNAL OF COMPUTATIONAL AND NONLINEAR DYNAMICS
(2019)
Article
Engineering, Multidisciplinary
Vijay K. Yadav, Vijay K. Shukla, Mayank Srivastava, Subir Das
JOURNAL OF APPLIED NONLINEAR DYNAMICS
(2020)
Article
Engineering, Mechanical
Vijay K. Yadav, S. Das
NONLINEAR ENGINEERING - MODELING AND APPLICATION
(2019)