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Postdoctoral Position in Fragmentation

Submitted by ktramesh on
job
fragmentation
postdocs
multi-scale modeling and simulation
failure processes

We have one postdoctoral position, available in October 2009, in the general
area of fragmentation and dynamic failure. The specific interest is in the timescales and lengthscales associated with the interactions of failure modes in materials. A background in modeling and simulation is essential, while some experience with shock physics is desirable. The successful candidate will become part of a highly collegial and diverse research group with activities in nanomaterials, planetary science and biomechanics. The work involves collaborative research with the Johns Hopkins Applied Physics Laboratory, and US citizenship is required. If you are

Postdoctoral Position in Mesoscale Mechanics

Submitted by ktramesh on
job
Modeling and Simulation
postdocs
physics-based modeling

I have one postdoctoral position, available immediately, in the general area of mesoscale modeling. The specific interest is in the development of computationally tractable models that incorporate the appropriate lengthscales and that can be used for microstructural design. The work is in conjunction with research groups involved in the development of materials for impact applications. Examples of topics of interest include the processes of dynamic failure in specific microstructures, and the development of physics-based models that account for grain size, grain size distribution, grain rotation and texture. If you are interested, please send me (ramesh [at] jhu.edu (ramesh[at]jhu[dot]edu))
your CV and the names of at least two references. Women and minorities

Heat flux per unit area due to frictional dissipation (ABAQUS)

Submitted by loizou2 on
friction model
temperature
thermal
dynamic friction
Transient Thermal Stresses

Hi all

I have a 2D model containing 2 2-D blocks rubbing on each other, producing heat at the interface. (Coupled temperature-displacement analysis in ABAQUS 6.8-1). This works fine, as the temperature on the contact surfaces in increasing.



Now, I want to get the instantaneous the heat flux per unit area due to frictional dissipation as a field output. Is there any standard subroutine or any other way to achieve that? There is no such a variable included in the standard ones.



Thanks!

Andreas

Crack bridging

Submitted by eng_student on

Hello everybody,

I was reading reading about R-curve behaviour of materials on the web and noticed that "crack bridging" is a considrable cause of this behaviour. but i dont have a clear understanding of this phenomenon and how it affects R-curve behaviour.

i appriciate any help.

thank you.

Timoshenko theory

Submitted by Huma Khalid on

Hi all

I developed a Fnnite element code in Maple for Euler Bernoulli Beam Theory. Then I solved a cantilever beam with a vertical load at the free end. On comparing results with comercially available software, my results are good.

Finally I developd the FE formulation for Timoshenko beam theory. for the same cantilever problem, I introduced a small magnitue of shear modulus but the results are highly different from the Euler-Bernoulli beam.

Can any body explain this?

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