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.
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
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
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).
