Hi all,

I am working on Crack growth analysis of Turbocharger wheel and shaft assembly. I have simulated it as an axisymmetric problem with fine mesh around the cracktip(in Ansys). Element used is Plane182.

I have to compare the K1 and K2 values obtained from both the Displacement Extrapolation Method and J-Interal method. 

I got the K1 an K2 values at the cracktip location by defining path using displacement extrapolation method.

But, I was not able to get the Stress intensity factor values (K1 nad K2) using J-Integral Method.

Please help me in this probem.

Thanks in advance.

Best Wishes

Balaji

      I'm looking at the design forces acting on a vertically hinged mitre gate for flow control in a canal, (open channel flow).  We know the maximum volumetric flow rate of the water flow when the gate is closing.  How can I estimate the maximum force exerted on the gate as the water causes it to slam shut.  

Effect of tornadoes on electrical power lines has been discussed by Sébastien Langlois in his M.Eng. thesis : “Design of Overhead Transmission Lines subject to Localized High Intensity Wind”. McGill University, Montreal, QC, Canada, 2007 (available on-line on the “Theses Canada” portal). Work presents various national and international standards (ASCE, Cigré, IEC etc.), historical cases, as well as models for numerical simulation.

An interesting presentation of the state of the question by  Dr Louis Cloutier, in 2008.

As a follow-up, here is a photograph of a (rather extreme) case of conductor fatigue.

Hi.

I'm working  with the element link8 (Ansys 12.1) and I have to introduced the tensile curve and compression curve, but I don't know, How I have to introduced its???

I have worked with the comands: TB: aniso, miso,..., I think the best option is: TB, user, but How I have to introduced the values of tensile and compression curve?, when this are different.

 File attachment is the tensile and compression curve to introduce

Thank you, Toni 

In studies where the interface of surface features, patterns, shapes etc., are being evaluated for orientation, it will be useful to quickly identify areas of interest over the entire profile of measurement. By segmenting a surface into significant areas the user can quickly evaluate boundaries, peaks, pits, areas, volumes and many others to understand their functional role in the entire surface profile under study. App Note: http://www.nanovea.com/Application%20Notes/surface-boundary.pdf

Dear all

I saw that every 2 or 3 minutes came out a new post. Tomorrow is the deadline, and you are all crazy! Take a break and have some free chat.

Facts

Whilst picking up a joint of drill pipe with the PLS, the jaws opened,

and the pipe fell approximately 3 meters to the drill floor.

The red zone was enforced with barriers. There were no personnel

within the barriered off area. The pipe was recovered, with no damage to

the machinery, and the operation was continued after a TOFS.

Causes

An investigation team was sent from onshore, so we are awaiting the

outcome of that investigation. We can say it was observed that the jaw

function had been selected to ‘open’ and this may have happened when the

Failure Modes and Effects Analysis (FMEA) is an inductive method of performing a system reliability or safety analysis from a low to a high level. It is a Bottom Up approach in which the analyst looks in turn at each system component, assesses the effects of its failure on system behaviour.
The basic FMEA technique is to:
i. Examine each component in turn
ii. Identify ways in which it can fail (Failure Modes)
iii. Identify the consequence of these failures (failure Effects)

Body mechanics describes how your body moves. Being aware of and practicing good body mechanics throughout your day may help prevent injury and reduce strain on your body. Whether you're sitting at a desk all day or working on a drilling platform, you can practice and improve your body mechanics to help prevent stress and pain and reduce wear and tear on your muscles, tendons, ligaments and joints.

 Using divers in offshore operations carries significant risks.  The environment presents a number of hazards such as poor lighting, restricted oxygen supply and sometimes extreme temperatures or pressures.  Discuss these risks and the safety measures in place to help reduce them.  

Working at height refers to working at a distance above the ground from which a person could fall or any distance liable to cause personal injury. This includes access and egress except by a staircase in a permanent workplace, work at or below ground level, but does not include slips and trips on the level.

Excavation is the most fundamental and important element in the construction industry, whether brownfield or greenfield. Basically, four excavation methods are employed during pipeline construction: vertical excavation; horizontal excavation; step trenching and cofferdams.

Operations with two or more installations and simultaneous operations such as construction and production need appropriate management systems and controls for effective use of resources and to minimise risk.

Confined space refers to an area which is enclosed with limited access that makes it dangerous to work. An example is the interior of a storage tank which workers may enter for maintenance work but which is not a habitable place.

An emergency water landing is  an unplanned landing into water made by an aircraft in response to  a crisis. 

Slips, trips and fall are the most common cause of injury at work. On average, they cause 40 per cent of all reported major injuries and can also lead to other types of serious accidents, for example falls from height. Slips and trips are also the most reported injury to members of the public.