The Special Issue "Advances in Elastic Micro-Structured Systems and Metamaterials", that will be published in Applied Sciences (Impact Factor: 2.474), is open to receive submissions for peer-review and possible publication.
The aims and scope can be found at the following link:
https://www.mdpi.com/journal/applsci/special_issues/elastic_micro_struc…
Surface instability of compliant film/substrate bilayers has raised considerable interests due to its broad applications such as wrinkle-driven surface renewal and antifouling, shape-morphing for camouflaging skins, and micro/nano-scale surface patterning control. However, it is still a challenge to precisely predict and continuously trace secondary bifurcation transitions in the nonlinear post-buckling region. Here, we develop lattice models to precisely capture the nonlinear morphology evolution with multiple mode transitions that occur in the film/substrate systems.
EML Webinar on 16 September 2020 will be given by Prof. Rob Shepherd, Cornell University, Discussion leader: Jamie Paik, EPFL
Title: Title: Optoelectronic Sensing of the Deformation of Soft Robots, and their Electrohydraulic Power
Time: 7 am California, 10 am Boston, 3 pm London, 10 pm Beijing on 16 September 2020
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.
Dear iMechanicians,
I hope some of you find of interest our latest Acta Mat. paper. We show that the concept of "beneficial traps" can enlarge by an order of magnitude the range of "safe loading frequencies" at which hydrogen embrittlement is not observed.
Analysis of the influence of microstructural traps on hydrogen assisted fatigue
Rebeca Fernández-Sousa, Covadonga Betegón, Emilio Martínez-Pañeda
Acta Materialia 199, 253-265 (2020). Link
By Yu Zhou and Lihua Jin
Journal: International Journal of Fracture
Abstract: A simple nonlocal field theory of peridynamic type is applied to model brittle fracture. The kinetic relation for the crack tip velocity given by Linear Elastic Fracture Mechanics (LEFM) is recovered directly from the nonlocal dynamics, this is seen both theoretically and in simulations. An explicit formula for the change of internal energy inside a neighborhood enclosing the crack tip is found for the nonlocal model and applied to LEFM.
Usually, roughness destroys adhesion and this is one of the reasons why the "adhesion paradox", i.e. a "sticky Universe", is not real. However, at least with some special type of roughness, there is even the case of adhesion enhancement, as it was shown clearly by Guduru, who considered the contact between a sphere and a wavy axisymmetric single scale roughness, in the limit of short-range adhesion (JKR limit).
EML Webinar on 9 September 2020 will be given by Prof. Rob Ritchie, University of California, Berkeley, Discussion leader: Nanshu Lu, University of Texas at Austin.
Title: Damage-Tolerance in Engineering and Biological Materials
Time: 7 am California, 10 am Boston, 3 pm London, 10 pm Beijing on 9 September 2020
