All,

    The deadline to submit article for the CSME international congress has been extended to February 17th, 2012. We are organizing a symposium on fatigue and fracture of engineering materials and strongly encourage researchers around the world to submit their research articles relevant to this field. 

More information can be obtained from the following website:  http://umanitoba.ca./engineering/conferences/csme2012/index.html

i got three questions here.

1) If im using ANSYS, how am i gonna do a fatigue life prediction of a welded joint? The speciment is butt joint. I need to know the procedure.

2) If im using ANSYS nCode DesignLife, how am i gonna obtain the SN curve if im using FE Model or Multi-column?

3) If Im using ANSYS nCode DesignLife, what should i pick for the geometry if im doing on CTOD method of a butt joint welded speciment?

Thanks for the help. :)

After a long process (somebody may recall I made also quite some chaos on imechanica to complain with the review process in a previous journal), this paper was accepted.  Ask me a preprint if you are interested.  I can attach here a few images only.

M. CIAVARELLA
Politecnico di Bari, 70125 Bari, Italy
Received in final form 13 June 2011

French spoken

Failure of railway axles has been the problem which gave origin to the studies about 'fatigue'. The modern approach to the structural integrity of these safety components is to complement the traditional designwith a 'damage toleranc' analysis.

A Special Issue just appeared onto Eng. Fracture Mechanics presents some of the most recent research.

I am currently having difficulty modelling fatigue analysis on a wheelchair frame with hollow circular sections (pipe 16). When assigning the stress locations it says that the stress is not available for that node. 

Any help would be appreciated!

Even Jay Leno tried to understand fatigue cracks at his Yesterday’s Tonight Show, our research on fracture and failure mechanics is received great attention from the general public. Read more after this photo--

Title: Structural FEA Intern 

Employer: Schlumberger Technology Corporation

Location: Sugar Land, TX, USA

Starting Date: Available immediately 

One postdoc and several PhD student positions are available at Clarkson University. Research background in at least one of the following areas is preferred.

1. Fatigue and fracture of materials and structures, computational mechanics and numerical methods

2. Probabilistic methods, Bayesian statistics, reliability and risk assesment 

3. Structural dynamics, health monitoring, signal processing, system identification

Interested candidates please send application documents (CV and personal statement) to yliu@clarkson.edu. Details about my research can be found at my personal web people.clarkson.edu/~yliu

Title: Structural FEA Intern 

Employer: Schlumberger Technology Corporation

Location: Sugar Land, TX, USA

Starting Date: 01/01/2011 

Raiway axle failures have been the starting point for the studies on fatigue. However, recent accidents and papers (see [1] by Hoddinott) have shown that corrosion-fatigue plays a significant role.

At PoliMi we have recently investigated this topic finding interesting results by corrosion-fatigue tests on small-scale specimens and, recently, a validation of the model by full-scale corrosion-fatigue tests (see papers [2-3]).

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

The
Interdisciplinary Centre for Advanced Materials Simulation (ICAMS) is
a new research centre at the Ruhr-University Bochum, Germany. At
ICAMS an interdisciplinary team of scientists from engineering,
materials science, chemistry, physics and mathematics is working on
the development and application of a new generation of simulation
tools for multi-scale materials modelling.

While there is a lot of experimental literature available on the effects of stress-state on ductile failure under monotonic loading, corresponding studies on fatigue mostly involves bending and torsion type of combination loading. Unfortunately, such a loading corresponds to one of the principal stresses being negative and therefore not as critical. We could find only two references which show clear effect of biaxial state of stress in a pressurised cylinder subject to additional axial load (Biaxial-tension fatigue of inconel 718, it is a report in UIUC 1989). I was wondering if we are missing out on something because it seems such an obvious line of investigation inspite of the difficulties involved in bi-axial fatigue testing of metals.

My research objective is to import surface roughness (topography) data obtained from metrology instrument (in txt form) and to build a finite element model from this. can anyone has same experience as that of mine n can help me in this regard. do someone has matlab m-file to do this and can send me???

thanks in advance

I am teaching Subsea Integrity for the MSc students majoring in Subsea Engineering at the School of Engineering, University of Aberdeen. This is a course that combines the fundamental principles (corrosion, fracture, fatigue and material selection) with the industry applications (subsea integrity management and implementation, cathodic protection, case studies on subsea reliability and engineering assurance).

Teaching time schedule

there are two analytical concepts that are very important in fatigue failure.the first one is crack closure and the others is residual stress .the first one is in behind of crack and the other emphasis in the front of crack tip. the question is if we use some devices such as AFM/SEM is it possible we model the energy filed during fatigue process?   if this idea can be investigated the second question can be asked: is there any similarity to model for different loading conditions? 

I appreciate if you also put your comment in my idea?

Bes Regards,

Hadi 

Dear Collegue

We are organising in July 7-9, 2010 an Euromech workshop on Multiscale
effects in Fatigue, at the Ecole Polytechnique, near Paris in France.
Outcomes and topics are detailed on the following web site:

http://www.lms.polytechnique.fr/Euromech

We would be honoured if you could contribute to this workshop to present
some of your recent research results.  The workshop is thought as a small
meeting in order to promote active discussion on the hot topics in this
field.

with kindest regards
Andrei Constantinescu & Michele Ciavarella

--
Andrei Constantinescu

Can anyone help point me to publicly-available fatigue or fracture test data? I am interested in obtaining a variety of data for statistical processing. It seems many authors have used the data collected by Virkler and Hillberry which seems to be widely used, but I have not found raw data for their tests so far; is this data available somewhere for me to use? Any help is very appreciated.

Hello ANSYS  users,

I am having hard time ANSYS's documentation for fatigue analysis in claasic environment. Tutorials available on internet talk bat ansys workbench only. Has anyone done fatigue analysis in ANSYS claasic? If yes, is there any source for tutorials ?

Thanks,

Sir,

one of my students is working on PhD topic " Study of cold hole expansion and evaluation of fatigue properties on critical aerospace components". His work has to be reviewed by professor of non indian origin in foreign universities. I request you to kindly help this student. If you are interested, let me know, so that I will ask my university to contact you in this regard.

Thanks

Kirthan.L.J

Hello 

what do think why investigators await about 3 decades to calculation of local stress/strain by elastic-plastic fracture mechanics?and basically why elber's discovery[crack closure] was so important and play a key role in numerous articles?

How can i calcualtion the amount of load transfer through the contacting crack faces?

How can i determine the location of it?

Thank you

Hadi