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How to calculate a shockwave profile

Submitted by billowriver on
education

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.  

How do you add springs or trusses to an orphan mesh (imported mesh) in Abaqus?

Submitted by dinogomez on
Forums
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Hello,I am a new user to Abaqus.  I created an FE mesh of the human neck using a different software, and successfully imported the .inp file into Abaqus.  I need to create either spring or truss elements to the mesh, and I am not sure how to do this, any thoughts?  Every time I try to add components, I get an error saying that you can’t change geometry to an orphan mesh.  Thanks

 

S-N curve

Submitted by basak.pradip on
education
Plasticity

I am working on plastic behaviour of metal. I am using Abaqus 6.7 for simulation of uniaxial ratcheting of steel under cyclic loading. Modelling and job submission/completion has been done successfully. But I cann't understand  where  the data for Stresses(S) &  number of cycle(N) is strored to draw S-N curve. Please suggest.

A 3D interactive CAE Knowledge Portal is launched with Social Elements

Submitted by vrmdr123 on
education
Graphics Cloud

A 3D Social Net Working Site (http://bit.ly/9yGMrO) was launched for publishing 3D Simulations.  It is to 3D Simulations like what youtube is for videos. The teachers / Professors of Science , Engineering, FEA, CFD can download the 3D simulations from here and embedded into PowerPoint slides and show interactive 3D simulations to the students, making the teaching of Science and Engineering very interesting. http://bit.ly/9yGMrO   

Tension in screw because of moment in section

Submitted by parisa on
education

Hi,

In a section of a beam with a rectangular hole which has got crack (see attached picture); Moment and shear are specefied. I can undrestand why we have tension in the screw because of the shear but why do we have tension because of moment in the screw? Can anybody explanin me why moment in the section can cause tension in the screw which should be accounted for in the screw design.

 

Thank you,

Parisa

Nancomposite textbook for undergrads ? recommend me one.

Submitted by Chris W Smith on
education
textbook
nanocomposites

Dear All,

I've got to start teaching a masters level programme on nanocomposites, well 7 lectures worth of one anyway. It will serve as an introduction to NCs and briefly review the current stat of the art.

I would like opinions on textbooks to accompany such a module.

Any of you had any good experiences with any particular books ?

 

Thanks,

Chris

Flow stress

Submitted by Bastian Boe on
education
tensile test
flow stress
cold rolling
plane strain

Hello

I am working on a thesis project dealing with flow stress in cold rolling, a plane strain operation. To determine the flow stress, tensile tests were carried out. I am aware, that the engineering strain/stress hast to be transfered to the true strain/stress and then the true strain/stress from the tensile test has to be mulitplied with the Von Mises yield criterion to yield the correspondent compressive flow stress in the rolling situation.

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