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Can an elastic structure buckle under tensile dead load?

Submitted by Davide Bigoni on

We all know Euler buckling of a beam under axial thrust, but can buckling occur in an elastic structure in which all elements are subject to tensile dead loading?

We provide a positive answer to this question, see http://www.youtube.com/user/RoyalSociety#p/u/0/EKngs1vvcJU

 

Microindentation & Fracture of Mineral Rock

Submitted by NANOVEA on

The use of Microindentation has proven to be a crucial tool for rock mechanics related studies. For example, Microindentation has been used to advance studies in excavation by allowing further understanding of rock mass properties and its separation. Microindentation has been used to advance drilling studies to improve drill heads and improve drilling procedures. Microindentation has also been used to study chalk and powder formation from minerals.

Paper Roughness Measurement With 3D Profilometry

Submitted by NANOVEA on

Paper surface topography is vital to the intended use and quality of the product. To control paper product quality it will heavily rely upon quantifiable, reproducible and reliable surface measurement. Precise surface measurement and evaluation of a paper product can lead to the best selection of processing and control measures. The Nanovea 3D Non-Contact Profilometer utilize chromatic confocal technology with unmatched capability to measure paper surfaces.

GEBT, a general-purpose composite beam solver

Submitted by Wenbin Yu on

Dear All,

I am writing to introduce to you a general-purpose composite beam solver, GEBT, which can capture all the geometrical nonlinearity obtainable by the six fundamental deformation modes (extension, torsion, bending in two directions, and shearing in two directions), and the coupling between these fundamental deformantion modes, such as extension-twist coupling commonly existing in initially twisted rotorblades. The features of GEBT are:

Free Webinar: Advanced Design of Multistage Centrifugal Compressor

Submitted by Helen_SoftInWay on

SoftInWay announces a free webinar on advanced approaches to multistage centrifugal compressor design, to be held on Thursday, March 31, 2011, at 10 a.m. and 4 p.m. EST.



Multistage centrifugal compressors are widely used in gas pipeline systems and chemical industry. Defining optimal design parameters is critically important for saving energy at unit operation because these machines have high mass flow rate and significant total capacity.