A5080714240- Rock Mechanics and Modeling
- Composite Material Mechanics
- Ultrasonics and Acoustic Wave Propagation
- Nonlocal and gradient elasticity in micro/nano structures
- Shape Memory Alloy Transformations
- Advanced Mathematical Modeling in Engineering
- Numerical methods in engineering
- High-Velocity Impact and Material Behavior
- Mechanical Behavior of Composites
- Landslides and related hazards
- Elasticity and Wave Propagation
- Image and Signal Denoising Methods
- Topology Optimization in Engineering
- Geotechnical and Geomechanical Engineering
- Structural Response to Dynamic Loads
- Advanced ceramic materials synthesis
- Geophysical Methods and Applications
- Numerical methods in inverse problems
- Fatigue and fracture mechanics
- Force Microscopy Techniques and Applications
- Structural Analysis of Composite Materials
- Microstructure and mechanical properties
- Advanced Surface Polishing Techniques
- Metal and Thin Film Mechanics
- Granular flow and fluidized beds
University of Arizona
2013-2023
Aristotle University of Thessaloniki
1988-2016
Oak Ridge National Laboratory
2010
University of California, Irvine
2009
Hella (Germany)
2001
Marymount University
1999
Sorbonne Université
1997
United States Air Force Research Laboratory
1997
University of California, San Diego
1996
University of Minnesota System
1992
Transmission of acoustic waves in two-dimensional binary solid/solid composite media composed arrays Duralumin cylindrical inclusions embedded an epoxy resin matrix is studied. The experimental transmission spectrum and theoretical band structure two periodic cylinders organized on a square lattice centred rectangular network are reported. Absolute gaps extending throughout the first Brillouin zone predicted. measured observed to drop noise level frequency intervals reasonable agreement with...
A method for detecting leaks in plastic water supply pipes through analysis of the pipe’s surface vibration using a high signal-to-noise ratio accelerometer is proposed and examined. The involves identification changes frequencies caused on pipe by leak developed from examined with respect to detailed experiments. results are promising, showing that detection possible provided sensor placed at small distance leak, since wave attenuation strong. indicate methodology has potential be new...
Vibration control of structures under near-fault earthquakes by employing a friction pendulum supplemented with thermally modulated shape memory alloy (SMA) springs as damper system is studied. Temperature modulation the SMA spring during earthquake effectively alters its hysteretic energy dissipation capacity and thereby efficiency isolation system. The response structure evaluated through nonlinear dynamic time-history analysis set recorded ground motions. Through temperature that yields...
A simplified approach for the nonassociative behavior of granular (geological) materials is proposed. The basic concept that plastic potential can be obtained by controlling or correcting yield function used associative plasticity. This achieved hardening, evolution growth function, which involves only one additional parameter above those model. Determination constants and verification with respect to two soils tested under a variety multiaxial stress paths are presented. It shown...
This paper reports the lattice Boltzmann method (LBM) based formulation for viscoelastic fluids with both volumetric and shear viscoelasticity. The relaxation limit of fluid yields LBM elastic solids or pressure (p) (s) wave propagation modes. reflection a two-dimensional p from an obstacle (wedge) inclined to direction is studied together convergence stability behavior as size time step decrease. model capable accurately predicting mode change (p s) due reflection. provides unique unified...
A study on shape memory alloy materials as vibration dampers is reported. An important component the strain rate–dependent and temperature-dependent constitutive behavior of alloy, which can significantly change its energy dissipation capacity under cyclic loading. The model used accounts for thermo-mechanical phase transformation. With increasing structural flexibility, hysteretic loop size increases due to rates, thus further decreasing response structure excitation. examined a beam, with...
In this work, a low-cost, low-volume, low-maintenance, small-scale compressed-air energy storage system (SS-CAES) is proposed, which can be used in conjunction with off-grid stand-alone photo-voltaic panels, for powering appliances and residential units order to minimize the dependency on centralized power grids. As first step towards achieving objective, we have designed examined compression efficiency of single-stage, isothermal that utilizes fluid piston. Preliminary results clearly...
We introduce a novel wavelet-based compound matrix to bridge models (Lennard-Jones model simulated with molecular dynamics and lattice Q-states Potts Monte Carlo simulation) that describe grain growth over different ranges of spatial time scales. The wavelet provides full statistical information on the microstructure at range scales is union those handled by two models.