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Experimental and numerical study of crack behaviour for capsule-based self-healing cementitious materials

Submitted by shavijabranko on

Dear all,

Our group at Delft University is developing self-healing concrete for over a decade. Recently, they have published a combined experimental and modeling study related to designing these materials. More details are available at https://www.researchgate.net/publication/319542777_Experimental_and_num…

regards

 

On cavitation in rubberlike materials

Submitted by Konstantin Volokh on

Microscopic voids can irreversibly grow into the macroscopic ones under hydrostatic tension. To explain this phenomenon it was suggested in the literature to use the asymptotic value of the hydrostatic tension in the plateau yield-like region on the stress-stretch curve obtained for the neo-Hookean model. Such an explanation has two limitations: (a) it relies on analysis of only one material model and (b) the hyperelasticity theory is used for the explanation of the failure phenomenon.

NEW.Mech 2017 at MIT on October 14

Submitted by Xuanhe Zhao on

We would like to let you know that free registration for the upcoming 8th annual New England Workshop on the Mechanics of Materials and Structures (NEW.Mech 2017) is open now.  The NEW.Mech 2017 is taking place at MIT on October 14, 2017.

 

W​e are excited to announce the keynote speakers for NEW.Mech 2017 are:

 

[Deadline: Sept. 30] 16th European Mechanics of Materials Conference (EMMC-16) Nantes, France, March 26-28, 2018

Submitted by Stephan Rudykh on

Dear Colleagues, 16th European Mechanics of Materials Conference (EMMC-16) will be held in Nantes, France,  March 26th-28th, 2018. As part of this meeting, we are organizing a session (S9) to bring together experts in modelling, simulation, manufacturing and experimental investigation in the field of Functional and architectured materials to present and discuss recent advances.

WCFA workshop on Design and Fatigue of Weldments

Submitted by pragtic on

This is the second announcement about the upcoming Workshop on Computational Fatigue Analysis 2017, this year dedicated to Design and Fatigue of Weldments (WCFA2017-DFW - http://www.pragtic.com/DFW.php). The workshop is held in Prague, Czech Republic in November 13-16, 2017. The key lecturer, who guides the audience through various issues of the fatigue analysis in welds, is Dr Zuheir Barsoum from KTH - Royal Institute of Technology in Sweden.

Molecular dynamics study of phonon transport in graphyne nanotubes

Submitted by Ali Ramazani on

We determine the thermal conductivities of a, b, and g graphyne nanotubes (GNTs) as well as of carbon
nanotubes (CNTs) using molecular dynamics simulations and the Green-Kubo relationship over the
temperature range 50e400 K. We find that GNTs demonstrate considerably lower thermal conductivity
than CNTs with the same diameter and length. Among a (alpha), b (beta), and g (gama)-GNTs, g-GNT has the highest thermal
conductivity at all temperatures. By comparing the phonon transport properties of GNTs with CNTs, we

Theoretical studies on lattice-oriented growth of single-walled carbon nanotubes on sapphire

Submitted by Zhengwei Li on

In this work, a theoretical study is performed to quantitatively understand the van der Waals interactions between single-walled carbon nanotubes (SWNTs) and sapphire substrates. The energetically preferred alignment directions of SWNTs on A-, R- and M-planes and the random alignment on the C-plane predicted by this study are all in good agreement with experiments. It is also shown that smaller SWNTs have better alignment than larger SWNTs due to their stronger interaction with sapphire substrate.

Stress-Life Fatigue Testing Basics

Submitted by Deniz Yalcin on

ADMET CEO and Chief Engineer Richard Gedney's article on fatigue testing applications was published on the Quality Magazine August 2017 issue. 

The article starts with brief descriptions of the four stages of metal fatigue:

Stage 1: Crack Initiation

Stage 2: : Slip Band or Stage 1 Crack Growth

Stage 3: Stage II Crack Growth

Stage 4: Ductile Failure 

Abaqus Python : reading odb file for field frame data

Submitted by sidd04mech on

Hi,

I am running a python script to do some post processing on Abaqus odb file. While running it on Abaqus/Explicite output file I found it was taking more than usual time. And after timing the run I got the surprise that the most time consuming thing what just to read the time value for each frame. I have the script below.

def main():

odb=openOdb('F:/Scripting/.../.../Example.odb') 

stkeys=odb.steps.keys()

stp=odb.steps[stkeys[-1]]

frms=stp.frames