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Viscoelastic cooling of glass

Submitted by sn_sohail on
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Hi ,

I am trying to model cooling of molten glass in ABAQUS. Does any one knows how to convert the viscosity data for ABAQUS?

I have viscosity curve against temperature for my glass. In ABAQUS, choosing time based Viscoelastic behaviour, Prony series coefficient needs to input for ABAQUS.

DOes any one knows how can i find theses coefficient from viscosity curves, or any other thing that can be helpfull.

Thanks

Soheil,

 

Terminology for discrete approaches to modelling fracture

Submitted by grassl on
research

It appears to me that there is more and more research done on discrete approaches to modelling fracture.

Especially for brittle or quasi-brittle materials these methods are undergoing a revival.

I am not sure why this is the case. I am also not in the position to judge if this revival is useful.

I just had recently a look at some of these models and I found these discrete models to be suitable

for description of fracture in heterogeneous materials, where cracks appear at many different positions.



In situ observation of dislocation nucleation and escape in a submicrometre Al single crystal

Submitted by Daniel Kiener on
research
nanomechanics; plasticity; dislocation dynamics; in-situ TEM

Dear colleagues,

Experimental nanomechanics is a frequently discussed topic on imechanica, see e.g. the very active monthly topics by Xiaodong Li, Julia Greer and Wei Cai.

Continuing on this, I would like to draw your attention to a paper we recently published:

"In situ observation of dislocation nucleation and escape in a submicrometre aluminium single crystal" by Sang Ho Oh, Marc Legros, Daniel Kiener & Gerhard Dehm (http://www.nature.com/nmat/journal/v8/n2/abs/nmat2370.html).

Importing Patran neutral file in to Ansys

Submitted by Zahra Zabolizadeh on
research

I imported the Patran neutral file (with *.out) in to Ansys(for a plate with a hole which was generated in the IDL and was imported in to the Patran) . but just the geometry of plate imported and i had not any elements, nodes (any mesh), and it reported in the Ansys. I also tried "import mesh " and nothing happend. could you please let me know what should I do?

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