research

On the overall yield function of a hollow sphere

Submitted by Stefan C. Soare on Fri, 11/27/2015 - 20:09

Motivated mostly by analytical (or formal) considerations, a vast majority of the works dedicated to the study of the overall plastic response of a porous metal assumes that the sound material (or matrix) obeys a quadratic yielding criterion (von Mises or Hill'48). However, most metals of technological interest today feature significant deviations from the quadratic form of yielding. Therefore a realistic modeling of their behavior, while sustaining damage, requires appropriate consideration of their yielding properties.

Bonds, bands and elasticity of smithsonite rock

Submitted by abouibes on Thu, 11/26/2015 - 13:45

research

The objective here is to spread out in detail the various fundamental state properties of smithsonite rock (ZnCO₃) for which the most intrinsic quantities remain still unknown. First-principles electronic structure calculations based on the density functional theory with the pseudopotential method were performed using diverse functionals. A number of mechanical quantities were evaluated such as bulk modulus, elastic constants, Young's and shear moduli, and transversal and longitudinal sound velocities (V_S and V_P).

Computational analysis of metallic nanowire-elastomer nanocomposite based strain sensors

Submitted by mortezaamjadi on Tue, 11/24/2015 - 12:49

Possessing a strong piezoresistivity, nanocomposites of metal nanowires and elastomer have been studied extensively for its use in highly flexible, stretchable, and sensitive sensors. In this work, we analyze the working mechanism and performance of a nanocomposite based stretchable strain sensor by calculating the conductivity of the nanowire percolation network as a function of strain. We reveal that the nonlinear piezoresistivity is attributed to the topological change of percolation network, which leads to a bottleneck in the electric path.

Journal of Dynamic Behavior of Materials finishes its first year

Submitted by en_brown on Sun, 11/22/2015 - 00:16

research

The December Issue of JDBM is now available, completing the first year of this new journal sponsored by the Society for Experimental Mechanics. Springer is making all papers freely available for the first two years. http://link.springer.com/journal/volumesAndIssues/40870

Bridge Damage Dynamic Analysis

Submitted by mohammedlamine on Fri, 11/20/2015 - 19:39

research

application PHD

Scientific Reports - EML - Carbon ::: Three Papers on Graphene

Submitted by Dibakar Datta on Wed, 11/18/2015 - 02:12

Surface hydrogenation regulated wrinkling and torque capability of hydrogenated graphene annulus under circular shearing , Nature Scientific Reports [

Tough Soft Wet Adhesion

Submitted by Xuanhe Zhao on Tue, 11/17/2015 - 04:21

interfacial toughness

SAMs Lab research

Tough bonding of hydrogels to diverse non-porous surfaces

Hyunwoo Yuk, Teng Zhang,Shaoting Lin, German Alberto Parada & Xuanhe Zhao

Nature Materials (2015) doi:10.1038/nmat4463

The world’s first integrated flexoelectric MEMS on silicon

Submitted by Amir Abdollahi on Mon, 11/16/2015 - 16:43

research

Flexoelectricity

Dielectric/Piezoelectric Materials

N/MEMS

Electronics Systems

This work has been recently published in Nature Nanotechnology.

Ashby PhD Scholarship in the Mechanics of Materials

Submitted by Helen Gardner on Mon, 11/16/2015 - 09:53

research

A fully funded PhD scholarship exists in the area of mechanics of materials, endowed in honour of Prof M F Ashby. The successful applicant will have a 1st class degree (and ideally a Masters degree) in an appropriate field. The precise topic of the PhD can be fixed after the scholarship has been awarded.

Further details may be obtained from Ms H A Gardner (has22 [at] cam.ac.uk (has22[at]cam[dot]ac[dot]uk)) .