fracture mechanics

In armchair graphene sheets, crack propagates perpendicular to the applied strain, whereas crack propagation in zigzag sheets occurs at an angle to the straining direction. This occurs due to different bond structure along armchair and zigzag directions as shown in Fig. 1. Videos 1 and 2 show the fracture of armchair and zigzag sheets, respectively.

Fig. 1: Armchair and zigzag directions of graohene

The Department of Civil and Environmental Engineering at the National University of Singapore (NUS) is recruiting 2 post-doctorate research fellows to pursue research on ice-structure interaction in the Keppel-NUS Corporate Laboratory. As part of the S$75 million collaboration between Keppel Corporation and NUS, the team comprising of Prof. Andrew Palmer, Dr. Bai Wei, and Dr. Pang Sze Dai, seeks to develop solutions for offshore rigs to meet the challenges of harsh arctic environments in oil and gas exploration and production.

I have updated my notes on the Griffith paper.  I added more description on the experimental determination of surface tension of solids.  Griiffith himself determined the surface tension of glass by an experimental setup.  Udin et al (1949) described a setup based on the same principle.  This setup is now known as the zero creep experiment.

The class started today.  I'll be teaching fracture mechanics this semester.  I'll be mostly using the class notes I wrote in 2010, but will post updated ones. 

In today's class I covered "Trouble with linear elastic theory of strength."  I have just posted updated notes of the lecture.  The new notes begin with the follwoing paragraphs.

Applications are invited for few open positions in the area of
multiscale simulation of fatigue and fracture of advanced alloys and
nano-material based composites. Primary focus of this research is investigation
of fatigue and fracture behavior of nanomaterials and to develope various
constitutive models for continuum, based on large scale atomistic simulations.
Research effort will include development of analysis and design methods toward
improving material/structural behaviour using computer simulation. Interested
candidates should have preferably MTech/ME degree in
mechanical/civil/aerospace/material engineering discipline with good knowledge

This is a call of interest for a post-doc position (1 year renewable up to 3 years) at the IMT Institute for Advanced Studies Lucca, Italy (www.imtlucca.it), in the field of computational damage and fracture mechanics. The activities are in the framework of the ERC Starting Grant IDEAS "Multi-field and multi-scale Computational Approach to design and durability of Photovoltaic Modules" (Prof. Paggi, Principal Investigator).

For more details about the project, see:

there is a phd position on investigation of fracture mechanism of spot welds in automotive steels, 

the funding is available for UK/EU nationals

please go to

http://www.shef.ac.uk/mecheng/phd/projects/deformation-spot-welding 

for further information.

The
Center for Mechanics of Solids, Structures and Materials has immediate openings
for two post-doctoral positions, dealing with (i) laboratory experiments on hydraulic
fracture and (ii) ductile failure in metals. The primary focus in both
investigations is on performing laboratory experiments that are then followed
by appropriate analyses. Candidates with a strong background in solid mechanics
and experience in experimental solid mechanics are encouraged to contact Professor

PhD and Post-Doc positions are now available at the Institut für Angewandte Mechanik of the Technische Universität Braunschweig, Germany. Both are full-time fixed-term positions for 2 years with the possibility of renewal.

We would like to inform you about a Workshop on "Physics-based fracture and damage mechanics" in Antalya/Turkey, May 15-17, 2013.

The workshop is co-organized by the Joint Research Centre (European Commission) and TOBB University of Economics and Technology. The Workshop is funded by the European Commission’s Integration and Enlargement Action. The participants from target countries* (citizen of or working in a target country) can be fully financially supported by the European Commission.

CSIRO division of Earth Science and Resource Engineering is seeking a Senior Research Scientist in hydraulic fracturing/geomechanics. The position is located in Melbourne, Australia and the successful candidate will play a leading role in a world class hydraulic fracturing laboratory facility and in a hydraulic fracturing research team that integrates modelling with experimentation at laboratory and field scales.

European Commission' s JRC (Joint Research Centre) is organizing the 2nd workshop on physics based modeling of material properties and experimental observations in collaboration with TOBB University of Economics and Technology. The workshop will be held in Antalya/Turkey on 15-17 May 2013, and the special focus will be fracture and damage mechanics.