elastic waves

My lab is looking for strongly motivated Ph.D. students and Postdocs to join our group in the Department of Mechanical Engineering & Materials Science at Duke University. We conduct research on human-centered materials intelligence through a combination of flexible electronics, robotic metamaterials, and artificial intelligence. Two positions are available immediately. 

Position 1: The project will focus on the design, fabrication, and testing of robotic mechanical metamaterials.

Wave Mechanics and Metamaterials Laboratory seeks candidates with strong knowledge in magnetoelasticity, wave mechanics, finite element modeling (ideally of magneto-mechanical coupling), or strong experimental background in ultrasonics or magnetism (ideally knowing how to operate an electromagnet). For more details, pls, see attached file.

In this paper we investigate the possibility of elastodynamic transformation cloaking in bodies made of non-centrosymmetric gradient solids. The goal of transformation cloaking is to hide a hole from elastic disturbances in the sense that the mechanical response of a homogeneous and isotropic body with a hole covered by a cloak would be identical to that of the corresponding homogeneous and isotropic body outside the cloak.

In this paper we formulate the problem of elastodynamic transformation cloaking for Kirchhoff-Love plates and elastic plates with both in-plane and out-of-plane displacements. A cloaking transformation maps the boundary-value problem of an isotropic and homogeneous elastic plate (virtual problem) to that of an anisotropic and inhomogeneous elastic plate with a hole surrounded by a cloak that is to be designed (physical problem). For Kirchhoff-Love plates, the governing equation of the virtual plate is transformed to that of the physical plate up to an unknown scalar field.

We are looking for candidates to join the Utah Waves and Architected Materials Group (w.mech.utah.edu). We have fully funded openings for undergrads, MS and PhD. Both full-time and part-time researchers are needed.

Graduate researchers are being sought to join the Penn State Ultrasonics Laboratory, which is part of the department of Engineering Science and Mechanics at Penn State. Research topics include, but are not limited to ultrasonics for nondestructive evaluation/testing, stress waves in solids, influence of microstructure on wave propagation and scattering, diffuse field methods, acoustics applied to qualification of additively manufactured parts, acoustic microscopy, nonlinear elasticity, mechanics of soft materials, and acoustic metamaterials.

by Pavel I. Galich, Nicholas X. Fang, Mary C. Boyce, and Stephan Rudykh

J. Mech. Phys. Solids, 91:390-410 (2017) http://dx.doi.org/10.1016/j.jmps.2016.10.002