Blog posts

3 D simulation of nanoindentation

Submitted by nanoi on Wed, 03/02/2011 - 21:20

Hello everyone,

I build a 3D model in abaqus to simulate nanoindentation.The job finished successfully, but the problem is when I run the odb file for output there is no stress distribution in the specimen around the tip.Its just like a knife poking a piece of butter.There is no stress distribution!!I did the nanoindentation simulation in 2D .It was ok then.But for 3D I am facing this problem.Anyone can help?

The boundary condition I used is:

For making the specimen fixed :u1=u2=u3=ur1=ur2=ur3=0

Convergence of Stress Value Near a Sharp Notch in ANSYS or ABAQUS

Submitted by ali_mechanic_64 on Wed, 03/02/2011 - 08:41

Dear All

I'm working on my thesis and in a part of it, I have to determine the stress around a sharp v-notch specially on the tip of it. the model is so simple(a rectangular plate with a v-notch on on the left side of it) and the load is tensile. But after solving the problem with both ANSYS & ABAQUS I realized the finer meshes,the greater stress on the tip of notch. I tried p-element method,but by using maximum level of p-element(that is 8) and fine meshes I couldn't reach to convergence again. I'm so confused and I really need help.

thanx.

Journal Club Theme of March 2011: Mechanics at Nano-Bio Interfaces

Submitted by Sulin Zhang on Wed, 03/02/2011 - 04:08

research

Ansys Analysis of Prestressed Concrete Columns

Submitted by Renato FAU on Tue, 03/01/2011 - 23:31

research

Hi,

Has anyone or can anyone help me model a prestressed concrete column on Ansys?

I have to model several different prestressed concrete columns to compare to an actual experimental result. I am just getting my feet wet with ansys and any help will be greatly appreciated.

Thanks!!!

Wavelengths of surface features

Submitted by r.nikhil on Tue, 03/01/2011 - 15:59

research

Roughness

wavelengths

I am working on the surface features of steel . I understand that surface features are broken down into various wavelengths and represented as Wa to We (0.1mm to 30mm wavelengths). Could some guide me to a reference which shows how to go about this process from the raw surface profile data ? Possibly, it involves Fourier Transforms, but I need a basic reference which shows how it is done .

Thanks!

Call for abstract-ASME IMECE 2011 Symposium on Integrated Structures and Materials in Advanced Technologies

Submitted by Teng Li on Tue, 03/01/2011 - 14:46

conference

Dear colleagues,

We would like to invite you to submit an abstract to a Symposium on Mechanics of Integrated Structures and Materials in Advanced Technologies at the ASME 2011 IMECE, to be held Nov 11-17, 2011, at Denver, Colorado. This symposium will be the sixth in such a symposium series organized by ASME Technical Committee of Integrated Structures since IMECE 2006. We hope you can join us and continue the success of this symposium series.

Abaqus Explicit

Submitted by Tima on Tue, 03/01/2011 - 11:29

research

prestress hold in abaqus explicit

Is there any way to introduce prestress hold in abaqus Explicit?

Multiscale fracture simulations: PhD President Scholarship for Engineering Infrastructure Challenges for 2020 -

Submitted by Stephane Bordas on Mon, 02/28/2011 - 14:42

job

multiscale;fracture;failure;multiscale fracture;manufacturing;silicon;XFEM;meshless;meshfree;MAD method;multiscale aggregating discontinuities;enrichment;hydrogen;smartCut;simulation;cutting;extended finite element;extended meshless methods;interfaces

Understanding
material failure : Multiscale fracture models for silicon wafer manufacturing

Attention: This award is prestigious and reserved to TOP students.

The award will cover
tuition fees at the Home/EU fee rate and will provide a stipend at the UK
Research Council rate (£13,590 in 2010/11) plus an enhancement of at least
£1,000 per annum.