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Research in the Dynamic Properties Research Laboratory at Georgia Tech concerns material behavior over a wide range of length scales. Issues of interest include - novel mechanical behaviors of metal nanowires such as shape memory and pseudoelasticity with recoverable strains up to 50%
- thermomechanical behavior of nanocomponents made of semiconducting materials such as ZnO and GaN
- phase transformations in nanomaterials and their effects on thermomechanical coupling and thermoelectric coupling
- strength and deformation of nanostructured polycrystalline materials such as Al and Fe2O3 and their composites
- equivalent continuum (EC) representations of atomistic systemseffects of microstructures of heterogeneous materials on fracture toughness
- fracture in ceramics and metals
Research approaches employed emphasize both high-performance computational finite element and molecular dynamics simulations and experimental characterizations using laser interferometry and novel digital diagnostics. A variety of quasistatic and dynamic deformation and loading conditions encountered in engineering applications are considered. The computational and experiments techniques allow for explicit account of material mesoscopic, microscopic, and nanoscopic structures. The objectives are to outline factors, mechanisms and conditions that enhance material performance under given conditions, to provide guidance for the enhancement of performance, and to facilitate the design of materials with specified functionalities. More Information on Current Research...
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X. Guo, W. Liang, and M. Zhou, Mechanism for the pseudoelastic behavior
of FCC shape memory nanowires, Experimental Mechanics; 49, 183-190, (2009);
A.J. Kulkarni, K. Sarasamak, J. Wang, F.J. Ke, S. Limpijumnong, and M. Zhou, Effect of load triaxiality on polymorphic transitions in zinc oxide, Mechanics Research Communications; 35, 73-80, (2008);
J. Wang, A.J. Kulkarni, F.J. Ke, Y.L. Bai, and M. Zhou, Novel mechanical behavior of ZnO nanorods, Computer Methods in Applied Mechanics and Engineering; 197, 3182-3189, (2008);
A. J. Kulkarni and M. Zhou, Continuum Characterization of Novel Pseudoelasticity of ZnO Nanowires, Journal of the Mechanics and Physics of Solids; 56, 2473-2493, 2008;
R. Dingreville, A. J. Kulkarni, M. Zhou, and J. Qu, A semi-analytical method for quantifying the size-dependent elasticity of nanostructures, Modeling and Simulation in Materials Science and Engineering; 16, 025002-1-16, 2008;
K. Sarasamak, A. J. Kulkarni, M. Zhou, and S. Limpijumnong, Stability of wurtzite, unbuckled wurtzite, and rocksalt phases of SiC, GaN, InN, ZnO, and CdSe under loading of different triaxialities, Physical Review B; 77, 024104-1-12, 2008;
J. Wang, A. J. Kulkarni, K. Sarasamak, S. Limpijumnong, F. J. Ke, and M. Zhou, Molecular dynamics and density functional studies of a body-centered-tetragonal polymorph of ZnO, Physical Review B; 76, 172103-1-4, 2007;
A. J. Kulkarni and M. Zhou, Tunable thermal response of ZnO nanowires, Nanotechnology; 18, 435706-1-6, 2007;
W. Liang and M. Zhou, Discovery, characterization and modelling of novel shape memory behaviour of fcc metal nanowires, Philosophical Magazine; 87, 2191–2220, 2007;
A. J. Kulkarni, K. Sarasamak, S. Limpijumnong and M. Zhou, Characterization of novel pseudoelastic behaviour of zinc oxide nanowires, Philosophical Magazine; 87, 2117–2134, 2007;
S. Chen, F. Ke, M. Zhou, Y. Bai, Atomistic investigation of the effects of temperature and
surface roughness on diffusion bonding between Cu and Al, Acta Materialia; 55, 3169–3175, 2007;
W. Liang, D. J. Srolovitz, M. Zhou, A micromechanical continuum model for the tensile behavior of shape memory metal nanowires, Journal of the Mechanics and Physics of Solids; 55, 1729-1761, 2007;
V. Tomar and M. Zhou, Analyses of tensile deformation of nanocrystalline a-Fe2O3 +fcc-Al composites using molecular dynamics simulations, Journal of the Mechanics and Physics of Solids; 55, 1053-1085, 2007;
A. J. Kulkarni, M. Zhou, K. Sarasmak, S. Limpijumnong, Novel phase transformation in ZnO nanowires under tensile loading, Physical Review Letters; 97, 105502, 2006;
V. Tomar, M. Zhou, Tension-compression strength asymmetry of nanocrystalline alpha-Fe2O3 + fcc-Al ceramic-metal composites, Applied Physics Letters; 88, 233107, 2006;
V. Tomar, M. Zhou,
Classical molecular-dynamics potential for the mechanical strength of nanocrystalline composite fcc-Al + alpha-Fe2O3, Physical Review B; 73, 174116, 2006;
A.J. Kulkarni, M. Zhou, Size-dependent thermal conductivity of zinc oxide nanobelts, Applied Physics Letters; 88, 141921 2006;
W. Liang, M. Zhou, Atomistic simulations reveal shape memory of fcc metal nanowires, Physical Review B; 73,115409, 2006;
A.J. Kulkarni, M. Zhou, Surface-effects-dominated mechanical and thermal responses of zinc oxide nanobelts, Acta Mechanica Sinica; 22, 217, 2006;
M. Zhou, Thermomechanical Continuum Representation of Atomistic Deformation at Arbitrary Size Scales, Proceedings of the Royal Society A; 461, 3437-3472, 2005;
W. Liang, M. Zhou and F. J. Ke, Shape Memory Effect in Cu Nanowires, Nano Letters; 5(10), 2005;
A. J. Kulkarni, M. Zhou, and F. J. Ke, Orientation and Size Dependence of the Elastic Properties of Zinc Oxide Nanobelts, Nanotechnology; 16(10), 2005;
W. Liang and M. Zhou,
Pseudoelasticity of Single Crystalline Cu Nanowires Through Reversible Lattice Reorientations, Journal of Engineering Materials and Technology; 127(4), 423-433, 2005;
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