Hi all

I am M.Sc. sutdent in Istanbul Technical University and my research subject is comparision of several ductile damage models both computationaly and experimentally.

I am trying to compare ductile damage models such as Freudenthal,Cockroft,Ayada ,Brozzo etc. computationally using ABAQUS and seeking a way to implement these damage models in ABAQUS.

To obtain each models damage result individually should damage model be implemented in ABAQUS or  can a regular tensile test results be used for calculation of damage values.

Could you please advise me for methodolgy to run a simulation to obtain ductile damage values accordng to models mentioned above.

Thanks in advance for your help.

Hakkı ISIK.

2 Year PDRA Opportunity in:

Image Based Modelling to Improve Damage/Fracture Tolerance in Materials

Would like to hear your expertise/user/non-expert/sceptic comments on XFEM. Here are some of the challenges. Would like to hear your relections.

1. Can XFEM be utilized in characterizing Failure rather than Fracture?

2. What sort of challenges XFEM still have with respect to Fracture Mechanics?

3. How the Fracture mechanics benefit the industry, from the perspective of strcutural integrity?

4. Failue investigations vs. Fracture investigations: benefit to industry?

5. Academist vs Engineer: Perspective on XFEM

If possible, please vindicate your justifications with any relevant literature. Would like to see where and how XFEM is evolving.

I welcome and encourage all my fellow imechanicians to participate in the international conference being organised at Thapar university patiala,  punjab, india during november 2010.

The details regarding the conference and research paper format are attached.

for further queries log on to www.thapar.edu, or http://www.thapar.edu/news-eventDet.asp?id=97 or email at

icetme2010@thapar.edu

Rahul Chhibber

Hello,

I seek help from the forum regarding the following. Because I am very new to mechanics.

I have a continuum damage mechanics model with me. I have set up a problem of a typical three point bending test on a notched beam. The notch in the center of the specimen and extends from the bottom face up to the middle of the thickness. It is a plane stress problem. Now I want to simulate load-displacement curve obtained from the experiment (s).

I was wondering what are the advantages of damage mechanics and fracture mechanics over each other? Specially in order to model the delamination phenomenon.

My research interest focuses on concrete damage constutitive model and its numerical implementation, performance-based seismic design of bridge structures, variational integrand method and conservative propertied of irreversible process, methmatical base of damage theory .Now I work as a postdoctoral research till Sep. 2009 at Tongji University, P R China.  My current research are supported partly by China Postdoc Fund Committee and Shanghai Postdoc Fund Committee.

The full oral program for the 7th International Conference on Fatigue Damage of Structural Materials is now available at http://www.fatiguedamage.elsevier.com/index.htm. Join your peers by registering for this popular single-stream meeting held in Hyannis, MA, USA on beautiful Cape Cod, September 14-19, 2008.  

We have an immediate opening in the Department of Engineering Science and Mechanics for a postdoctoral research associate in multiscale modeling and computational mechanics. The focus of this position is on the modeling, simulation, and analysis of the nonlinear evolution of coupled macro/microstructure in failure processes, with an emphasis toward structural health monitoring. Coupled-field models using continuum damage variables will be used to study the fundamental spatiotemporal features of damage evolution, particularly regarding the nature and origin of unpredictability in damage processes. The candidate must have a solid general background in theoretical mechanics and dynamics, and be familiar with nonlinear finite element analysis

In a recent Progress Article in Nature Materials, David Taylor, Jan G Hazenberg, and T Clive Lee write about the damage that human bones sustain as a result of cyclic stresses under which they operate and the repair mechanisms that operate.