Results 31 to 40 of about 260,156 (333)

First Principle Study of the Mechanical Properties and Phonon Dispersion of the Iron Pnictide Compound EuFe2As2

The Scientific World Journal, 2020
We present results on the first principle study of the elastic constants and the phonon dispersion of EuFe2As2 at zero pressure. The ground-state energy calculations were performed within Density Functional Theory (DFT) and the generalized gradient ...
N. K. Omboga, C. O. Otieno, P. W. O. Nyawere   +2 more
doaj   +1 more source

Characterizing Mechanical Properties of Layered Engineered Wood Using Guided Waves and Genetic Algorithm

Sensors, 2023
This study develops a framework for determining the material parameters of layered engineered wood in a nondestructive manner. The motivation lies in enhancing nondestructive evaluation (NDE) and quality assurance (QA) for engineered wood or mass timber,
Nemish Atreya, Pai Wang, Xuan Zhu
doaj   +1 more source

Inspection of Multilayer Pipes Using Longitudinal Guided Waves [PDF]

EPJ Web of Conferences
Currently, Multilayer pipes are increasingly preferred over single-layer alternatives due to their enhanced mechanical and chemical properties. This research establishes governing equations for longitudinal guided wave propagation in multilayered pipes ...
Drissi Azdine, Elallami Mhammed, Tajmouati Abdelali   +2 more
doaj   +1 more source

Splitting of waves in rotor-in-rotor nonlocal metamaterials by internal rotor coupling

Materials & Design, 2022
Mechanical metamaterials can be used to control wave propagation because they are flexibly adjustable. In this paper, a one-dimensional rotor-in-rotor metamaterial with internal rotor coupling is proposed.
Leiyu Yang, Lifeng Wang, Kun Wu, Yuqiang Gao   +3 more
doaj   +1 more source

Joint multizonal transdimensional Bayesian inversion of surface wave dispersion and ellipticity curves for local near-surface imaging

, 2021
Physical properties of near-surface soil and rock layers play a fundamental role in the seismic site effects analysis, being an essential element of seismic hazard assessment. Site-specific mechanical properties (i.e.
M. Halló, W. Imperatori, F. Panzera, D. Fäh   +3 more
semanticscholar   +1 more source

High-order space-time finite element schemes for acoustic and viscodynamic wave equations with temporal decoupling [PDF]

, 2014
Copyright @ 2014 The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.We revisit a method ...
Mark P Brewin, Shuhua Hu, Simon Shaw, Carola Kruse, Birch, MJ, Zackary R Kenz, Kruse, C, Brewin, MP, John R Whiteman, Maischak, M, Banks, HT, Malcolm J Birch, H. T. Banks, Stephen E Greenwald, Greenwald, SE, Kenz, ZR, Matthias Maischak, Whiteman, JR, Hu, S, Shaw, S   +19 more
core   +1 more source

Numerical and Experimental Investigation of Guided Wave Propagation in a Multi-Wire Cable

Applied Sciences, 2019
Ultrasonic guided waves (UGWs) have attracted attention in the nondestructive testing and structural health monitoring (SHM) of multi-wire cables. They offer such advantages as a single measurement, wide coverage of the acoustic field, and long-range ...
Pengfei Zhang, Zhifeng Tang, Fuzai Lv, Keji Yang   +3 more
doaj   +1 more source

NUMERICAL SIMULATION OF STRESS WAVE PROPAGATION IN SAP CONCRETE [PDF]

Civil Engineering Journal, 2018
The SAP (Super Absorbent Polymers) concrete is a new kind of concrete materials with uniformly distributed spherical pores with diameter of millimetre-size.
Zhenqun Sang, Zhiping Deng, Jianglin Xi, Huibin Yao, Jiang Wu   +4 more
doaj   +1 more source

Granular Crystals: Controlling Mechanical Energy with Nonlinearity and Discreteness [PDF]

, 2011
The presence of structural discreteness and periodicity can affect the propagation of phonons, sound, and other mechanical waves. A fundamental property of many of the periodic structures and materials designed for this purpose is the presence of ...
Boechler, Nicholas Sebastian
core   +1 more source

Mechanical balance laws for fully nonlinear and weakly dispersive water waves [PDF]

Physica D: Nonlinear Phenomena, 2016
The Serre-Green-Naghdi system is a coupled, fully nonlinear system of dispersive evolution equations which approximates the full water wave problem. The system is an extension of the well known shallow-water system to the situation where the waves are long, but not so long that dispersive effects can be neglected.
Henrik Kalisch, Zahra Khorsand, Dimitrios Mitsotakis   +2 more
openaire   +2 more sources