What is stress? Some more evidences
What is stress? Is stress a physical quantity?(second section)What is stress? Who has ever seen stress? Is stress a physical quantity?(second section)
Blog posts
Post-doctoral position at Univ. Pittsburgh: soft tissue buckling
A post-doctoral position is available in the lab of Sachin Velankar at the University of Pittsburgh to conduct experimental research on buckling of soft tissues in cephalopods (octopus or cuttlefish).
PhD position - Modelling of confinement and interfacial effects in small scale plasticity
The project is based on the well-known size effect exhibited by metals, i.e
the fact that their strengths are greatly enhanced when at least one
microstructural lengthscale is scaled down to the nanometer range or
when the size of the object is restricted to the micron or sub-micron
range. At these scales the interfaces and their associated properties
play a significant role. This project will focus on the effect of
spatial confinement on the three most common deformation mechanisms:
dislocation glide, mechanical twinning and mechanically-induced
martensitic phase transformations; and will be based on the synergies
between physically-based phenomenological modelling using
strain-gradient plasticity at the highest scale, and thorough
PhD positions at the University of Sheffield
Two PhD studentships of three years duration are available Department of
Civil and Structural Engineering and the Department of Mechanical
Engineering at the University of Sheffield sponsored by the Leverhulme
Trust.
More details can be found here
The studentship will fully cover University tuition fees at EU/UK level, provide a tax-free bursary of £13290. Closing date for applications is the 24th September 2010.
help needed - how to add and see truss elements added to orphan mesh in Abaqus
I am a new user to Abaqus, and am having some difficulties with adding non-linear truss elements. I have created truss sections and assigned them to elements created in
sets and assigned to section assignments. The only thing is I am not
able to see the truss elements. When I do a query on beam/truss, it
says that the part dosn't contain any. I am trying to add truss
elements to an imported orphan mesh, any help would be greatly
appreciated.Thanks!!!
Special issue on "Computational and Theoretical Materiomics" now published (J. Computational &Theoretical Nanoscience)
The special issue on "Computational and Theoretical Materiomics: Properties of Biological and de novo Bioinspired Materials" has now been published. A list of papers is included below. A sincere thank you to all contributors! Anyone interested in a reprint of any of the articles please send me a message.
What is stress? Is stress a physical quantity?(second section)
What is stress? Who has ever seen stress? Is stress a physical quantity?(second section) Let us re-consider an example for metal foam as show n Figures 1(a,b) that show the local flexuosity under cycle compression loading. Previous researchers used the effective elastic moduli theory and the effective stress concept to study this kind of problem. However, who know what are the approximate stresses at any point in the form, say, at the points A, B, A’, B’?
InternationInternational Journal of Applied Mechanics (IJAM) Vol.2 No.4
Forthcoming papers of International Journal of Applied Mechanics (IJAM) Vol.2 No.4:
1. “Atomistically-Informed Mesoscale Model Of Deformation And Failure Of Bioinspired Hierarchical Silica Nanocomposites”, Dipanjan Sen, Markus J. Buehler, (Massachusetts Institute Of Technology, USA)
2. “Single Walled Nanotubes As Kirchoff Elasticas”, Prabhat K. Agnihotri And Sumit Basu (Indian Institute Of Technology, India)
InternationInternational Journal of Applied Mechanics (IJAM) Vol.2 No.3
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Published papers of International Journal of Applied Mechanics (IJAM) Vol.2 No.3: 1. “Yield Design Homogenization Method For Compaction Of Monosized Spherical Powders”, Benabbes Anouar, Siad Larbi, Dormieux Luc, Wing Kam Liu, (Universit´E De Reims, France, Northwestern University, USA) |
How to calculate a shockwave profile
For a steady shock wave, since we know Rankine–Hugoniot relations,and Equation of state,
from downstream values, we can directly calculate upstream values, we know all the quantities, density, particle velocity, specific energy are functions of z (where z=x-ct), but, how to relate these quantities to z, and how to plot a S-Shape curve like density vs. z.