Dear colleagues,
Consider a simple non-linear elastic material with stress given as
σ = D(εdev) εdev + B εiso
where εdev is the norm of εdev, D is a function of εdev and B is constant. The material is isotropic since the principal directions of σ and ε will coincide.
The department of Aerospace Engineering at Embry-Riddle Aeronautical University is currently looking to fill a position at the Associate or higher level in the area of structures. The candidate should have an exemplary record of teaching and scholarly activities including externally funded research. The candidate should be able to teach our structures and fracture mechanics classes at the undergraduate and graduate levels.
A poroelastic material can imbibe solvent and swell. When the material swells inhomogeneously or
swells under external constraints, stresses can develop inside the material. The stresses can trigger
mechanical instabilities in the material or even break the material, which have been often observed
in experiments. In this paper, we study the wrinkling instability of a circular poroelastic plate, in
the process of solvent molecules migrating into the plate from the edge. The critical conditions for
Two solids can adhere to each other in the presence of a liquid bridge between them, which is called wet adhesion. When the solid is soft, the liquid bridge can cause deformation in the material, and in turn, the deformation may have dramatic effects on the wet adhesion. To investigate the effect, in this article, we calculate the deformation in two soft layers with different separations and connected by a liquid bridge. We illustrate the effect of deformation in the soft layers on the adhesive force.
Cavitation can be often observed in soft materials. Most previous studies were focused on cavitation in an elastomer, which is under different mechanical loadings. In this paper, we investigate cavitation in a constrained hydrogel induced by drying. With taking account of surface tension and chemo-mechanics of gels, we calculate the free energy of the system as a function of cavity size. The free energy landscape shows double-well structure, analogous to first-order phase transition. Above the critical humidity, a cavity inside the gel is tiny.
Dielectric elastomers (DEs) feature nonlinear dynamics resulting from an electromechanical coupling.
Under alternating voltage, the DE resonates with tunable performances. We present an
analysis of the nonlinear dynamics of a DE as electromechanical resonator (DEER) configured as a
pure shear actuator. A theoretical model is developed to characterize the complex performance
under different boundary conditions. Physical mechanisms are presented and discussed. Chaotic
Hello Mechanicians,
I have a doubt regarding Uniaxial Tensile Test which has bugged me for quite some time. It may be a trivial one, but it goes like this:
Symposium 12, Modeling of Vascular Tissues
June 29 – July 1, 2015
Location: Seattle, Washington at the Motif Hotel near Seattle Downtown Waterfront
Abstract Deadline EXTENDED: February 23, 2015
Description
no longer available.
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A postdoctoral position in france is openened on DFT calculations to get the influence of hydrogen on grains boudaries failure in Al polycristals. This work is a between LSPM and ITODYS labs.
Please find the position attached.
Contact:
We are looking for a few postdoctoral researchers to work on the following topics at Nanyang Technological University, Singapore.
1. First-principles calculation/molecular dynamics simulation of two-dimensional materials for energy and environmental applications.
2. Numerical modeling of fracture and fatigue behaviors of metallic/polymeric materials.
