Our new paper is online in Journal of Applied Mechanics. We exolore the thermomechancial coupling in polydomain liquid crystal elastomers. https://asmedigitalcollection.asme.org/appliedmechanics/article/doi/10….
A complimentary PDF is available: https://www.novatechsetproofs.com/authors/ASME/JAM-23-1288.pdf .
The ability to transform the crystal structure of metals in the solid-state enables tailoring their physical, mechanical, electrical, thermal, and optical properties in unprecedented ways. We demonstrate a martensitic phase transformation from a face-centered-cubic (fcc) structure to a hexagonal-close-packed (hcp) structure that occurs in nanosecond timescale in initially near-defect-free single-crystal silver (Ag) microcubes impacted at supersonic velocities.
A special issue of Journal of Nanomaterials is devoted to "Low-Dimensional Phase Transforming Materials" which obtained significant interests in the recent years. This topic covers a broad range of research such as
Molecular dynamics (MD) is employed to investigate the plastic deformation mechanisms of single crystalline yttria-stabilized tetragonal zirconia (YSTZ) nanopillars under uniaxial compression. Simulation results show that the nanoscale plastic deformation of YSTZ is strongly dependent on the crystallographic orientation of zirconia nanopillars. For the first time, the experimental explored tetragonal to monoclinic phase transformation is reproduced by MD simulations in some particular loading directions.
Shape memory alloys (SMAs) are intermetallic alloys displaying recoverable strains that can be an order of magnitude greater than in traditional alloys due to their capacity to undergo a thermal and/or stress-induced martensitic phase transformation. Since their discovery, the SMA industry has been dominated by products for biomedical applications with geometrically small feature sizes, especially endovascular stents.
PhD position(s) are available for Spring 2016 semester to perform theoretical and computational work on phase field modeling of variaous structural changes in engineering materials and modeling of interaction between phase transformations and plasticity. MS degree and background in continuum and computational mechanics is required. Please send vita to Prof. Valery Levitas (vlevitas [at] iastate.edu (vlevitas[at]iastate[dot]edu)).
Info about Prof. Levitas group can be found at
A postdoctoral position is available in the area of phase field modeling of solidification/phase transformation in the Department of Materials Science and Engineering at Missouri University of Science and Technology (formerly University of Missouri-Rolla). MSE program at Missouri S&T is one of the largest and most respected MSE programs in the US
(http://mse.mst.edu).
I would like to share our recent research work on FCC metallic nanowires, which is published in Journal of Physics : Condensed Matters (IOP) . The abstract of the paper is given below. Further details can be found at
Vijay Kumar Sutrakar et al 2012 J. Phys.: Condens. Matter 24 015401
doi:10.1088/0953-8984/24/1/015401
Abstract:
(to appear in International Journal of Fracture; Proceedings of the 5th Intl. Symposium on Defect andMaterial Mechanics)
Amit Acharya and Claude Fressengeas
