Cranfield has, for many years, had one of the largest programmes in the world of short courses in Gas Turbine Technology. This course aims to enable delegates to determine the life cycle of machines and machine components. Read more Read less
Fatigue and fracture are essentially two sides of the same coin since they both give us insight into the nature of cyclic failure and both allow us to determine the cyclic life of a component under particular conditions. Of course, fatigue is almost completely empirical in nature and based upon experience of broken components going back to the age when wheels first fell off railway rolling stock. Fracture, whilst still leaning heavily on practical test, is much more analytical in nature, being based upon an analytical model of the small flaw (imperfection) which all failed components can be assumed to have held before finally leading to their failure.
At a glance
- 18 - 20 Feb 2019
- Duration3 Days
- LocationCranfield Campus
- Cost£1,270 The course fee includes refreshments and lunch during the day. Accommodation is not included and must be booked separately. Concessions available
Course structureThis three-day course is presented through lectures and tutorials. Printed supplements are provided for much of the material covered in the course. A number of worked examples are undertaken by the delegates. Active participation from the delegates is strongly encouraged. All delegates will receive a Certificate of Attendance upon completion of this course.
What you will learn
On completion of the course, the attendee will be able to demonstrate an understanding of the basic concepts and theories of fatigue and fracture and be able to adopt them to undertake calculations.
The course introduces delegates to the problems involved in lifing machines, or machine components, for cyclic loading. It will deal with what is, without doubt, the most damaging of the failure modes, which we know as fatigue, arising as it does from the repeated application of a load, as for examples when we re-use a gas turbine many times (LCF) or when a component within the gas turbine vibrates (HCF).
It is not intended to dwell on the metallurgical nature of fatigue but instead to introduce delegates to some of the basic concepts, and resulting methods of calculation, with the aid of which engineers have managed to design for fatigue over the years. Calculating techniques from both the well-established fatigue design approach (SN Diagrams, Goodman Diagrams, Neuber Rule) and from the fracture mechanics approach (Stress Intensity, Paris Curve, Walker etc) will be used.
- Brief overview of conventional stress based lifing methods and the estimation of factor of safety using Goodman Diagrams
- Multi-axial fatigue: The use of Sines method to estimate equivalent mean and alternating stresses
- Cycle counting methods involving variation in fatigue stress concentration factor, in particular the ‘Rainflow Cycle Counting Method’
- Low cycle fatigue: The significance of using strain based methods as opposed to stress based methods; The use of the Neuber and Linear rules in conjunction with the Coffin and Manson equation or Manson’s Equal slopes equation to estimate the cyclic life of a component
- Introduction to linear elastic fracture mechanics and the use of the Paris equation to estimate the cracked life of a component
- Lifting philosophies including deterministic, damage tolerance and probabilistic methodologies.
Who should attend
There are no particular requirements for those attending this course except an interest in Cyclic Failure. The standard of the course is fairly fundamental, that is, it is not a forum for the latest theories, and the mathematics involved are fairly basic. Accordingly, attendees will derive additional benefit from the varied backgrounds and experience drawn from many UK and overseas organisations.
The course is presented through lectures and tutorials conducted by members of Cranfield University’s staff all of whom have considerable academic and industrial experience. Additional lectures will be presented by senior engineers from industry.
ConcessionsWhere more than five delegates are booking from within one site of one organisation, a discount of 10% will apply to the invoice for the course tuition fee. Accommodation fees are not included in the discount scheme at time of booking.
Accommodation options and prices
We are pleased to offer an exclusive accommodation package at our Mitchell Hall hotel. Located on campus, all rooms are en-suite and available on a half-board basis from Sunday to Wednesday. The cost of this package is £297. If you would like to book this accommodation package* for this short course, please indicate this on the registration form.
Alternatively, you may wish to make your own arrangement at a nearby hotel.
*Subject to availability.
Location and travel
Cranfield University is situated in Bedfordshire close to the border with Buckinghamshire. The University is located almost midway between the towns of Bedford and Milton Keynes and is conveniently situated between junctions 13 and 14 of the M1.
London Luton, Stansted and Heathrow airports are 30, 90 and 90 minutes respectively by car, offering superb connections to and from just about anywhere in the world.For further location and travel details
Read our Professional development (CPD) booking conditions.