Skip to main content

research

solver for a very hetereogeneous system of equations

Submitted by phunguyen on
research

Hello everybody,

I am solving a FE problem on a hetereogeneous medium consisting of rigid phase (Young modulus of about 100 000 N/mm2), a softer phase (Young modulus of 20 000 N/mm2) and pore (Young modulus of 1 N/mm2). The reason that I have to mesh the pore is that there are some elements of rigid phase hanging out in the pores. So, if I do not mesh the pore, then my FE matrix is singular. 

Viscoelastic cooling of glass

Submitted by sn_sohail on
Forums
Ask iMechanica
Choose a channel featured in the header of iMechanica
research

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).

Subscribe to research