Laboratory of Ocular Biomechanics, University of Pittsburgh.

May 14, 2021, 5:00PM-7:30PM, CET

Quasi-crystalline Structural Composites:

higher order symmetries and vibration localization

Massimo Ruzzene

P.M. Rady Department of Mechanical Engineering

Smead Aerospace Engineering Sciences

University of Colorado Boulder, Boulder CO, USA

Tensile tests are used to determine how materials behave under tension load. In a simple tensile test, a sample is typically pulled to its breaking point to determine the ultimate tensile strength of the material. The amount of force (F) applied to the sample and the elongation (∆L) of the sample are measured throughout the test.

Ares Rosakis and collaborators across three other institute have just published a fascinating account of a rather unexpected mechanism for generating  tsunamis. The paper, published in PNAS, is attached with this post.

The associated press-release provides a compelling lay-person summary: https://www.caltech.edu/about/news/contrary-to-previous-belief-strike-s…

We revisit Nye's lattice curvature tensor in the light of Cartan's moving frames. Nye's definition of lattice curvature is based on the assumption that the dislocated body is stress-free, and therefore, it makes sense only for zero-stress (impotent) dislocation distributions. Motivated by the works of Bilby and others, Nye's construction is extended to arbitrary dislocation distributions. We provide a material definition of the lattice curvature in the form of a triplet of vectors, that are obtained from the material covariant derivative of the lattice frame along its integral curves.

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.

I am seeking a PhD student to work on the design and modeling of morphing solids and shells. The position is fully funded and is available at the Department of Mechanical and Aerospace Engineering at the University of Missouri – Columbia.

Applicants will have a BS or an MS or an Engineering degree in a relevant area (Mechanical or Civil Engineering, Physics or Applied Mathematics). Knowledge of Python, Matlab and of an FEA software (e.g., Ansys) is a plus.

The prestegious Horace Mann medal is bestowed on selected Brown University graduate school alums who have made a significant impact in their fields. In 2021, this award goes to a mechanician whom we all know very well--Professor Ares Rosakis. The official news item can be found here: https://www.brown.edu/academics/gradschool/about/awards/horace-mann-med…

EML Webinar (Season 2) on 11 May 2021 will be given by Michael Sheetz, University of Texas Medical Branch. Mechanical Stresses Kill Tumor Cells Discussion Leaders: Taher Saif, University of Illinois at Urbana-Champaign and Guy Genin, Washington University, St Louis

Time: 10 am Boston, 3 pm London, 10 pm Beijing on 12 May 2021

Zoom Link: https://ter.ps/EMLWebinarS2

Esteemed Colleagues,

this post is to invite you all to attend our free on-line global live TAFMech webinar on Fracture Mechanics-related topics that will take place this Friday (07/05) at 2.30 PM GMT (3.30 PM BST). The webinar details are as follows:

Þ Prof. Tim Topper – University of Waterloo, Canada

& Prof. Grzegorz Glinka – University of Waterloo, Canada

Title of seminar: Discussion on the nature, limitations and successes of the SWT fatigue damage parameter