from The Open University
Alternatively you can skip the navigation by pressing 'Enter'.
More or Less: E-cigs, politics, school and birthdaysFriday, 5th February 2016 16:30 - BBC Radio 4More or Less investigates e-cigarettes, politicians' use of statistics, school attendance and exam results, and... Read more: More or Less: E-cigs, politics, school and birthdays
The Bottom Line: Winter 2015-16: Renewable EnergySaturday, 6th February 2016 17:30 - BBC Radio 4
More or Less: E-cigs, politics, school and birthdaysSunday, 7th February 2016 20:00 - BBC Radio 4
Thinking Allowed 2016: Consumerism, Work-life balanceMonday, 8th February 2016 00:15 - BBC Radio 4
More or Less: E-cigs, politics, school and birthdaysAvailable for over a yearMore or Less investigates e-cigarettes, politicians' use of statistics, school attendance and exam results, and... Read more: More or Less: E-cigs, politics, school and birthdays
Thinking Allowed 2016: Consumerism, Work-life balanceAvailable for over a year
Thinking Allowed 2016: The Creative Economy, 'Grudge' SpendingAvailable for over a year
More or Less: Alcohol, sepsis and gender balanceAvailable for over a year
The science of chocolateSenior lecturer in analytical science Claire Turner asks: Can chocolate ever be good for us? Watch now: The science of chocolate
Take the photographic memory testCan you capture scenes just by looking at them? Find out with our photographic memory test. Launch now: Take the photographic memory test
Discovering Wales and Welsh: first stepsThis free course, Discovering Wales and Welsh, introduces you to who the Welsh people are via a... Try: Discovering Wales and Welsh: first steps now
Organisations and management accountingThis free course, Organisations and management accounting, examines the nature of organisations,... Try: Organisations and management accounting now
The I-35W bridge collapse in Minneapolis in August 2007, resulting in at least 13 deaths, illustrates the importance of structural integrity. This free course, Introduction to structural integrity, looks at the investigation that followed the collapse of the Silver Bridge over the Ohio River in 1967 which demonstrates how the study of safe design and the assessment of components and structures under load is of increasing importance in engineering design.
After you have completed this unit you should be able to:
- differentiate between and describe dissolution, degredation and corrosion as they affect the deterioration of structural materials;
- predict electrochemical behaviour between dissimilar metals;
- explain galvanic corrosion in terms of the electrochemical series;
- distinguish between the hoop and longitudinal stresses in a pressure-vessel wall, and specify them in terms of the pressure, wall thickness and diameter of the vessel;
- describe the loads in the various parts of a structure and the most likely load path;
- indicate the procedures needed in practical failure analysis;
- specify the failure mechanisms possible when a nominally ductile material fails in a brittle fashion;
- relate crack formation to the loads on a component, bearing in mind the importance of stress concentrations in the component concerned;
- provide a likely sequence of events involved in the failure of a part made from several different components;
- describe the problem of fretting wear at a bearing joint;
- describe the key circumstances of a particular accident or disaster, and relate the sequence of events to specific causes supported by the relevant evidence.
- Current section: Introduction
- Learning outcomes
- 1 Engineering for purpose
- 2 Environmental deterioration
- 2.1 Introduction
- 2.2 Degradation, dissolution and corrosion
- 2.3 Corrosion processes
- 2.4 Corrosion processes: galvanic corrosion
- 2.5 Corrosion processes: galvanic series
- 2.6 Corrosion in stressed products – stress corrosion cracking (SCC)
- 3 Case study: The Silver Bridge
- 3.1 Background information
- 3.2 The disaster
- 3.3 The investigation
- 3.3.1 Sequence of events
- 3.3.2 Planning the investigation
- 3.3.3 Reassembling the parts
- 3.3.4 Examining the parts
- 3.4 Analysis of eye bar 330
- 3.4.1 Fracture surface
- 3.4.2 Analysis of the eye-bar steel
- 3.4.3 Simulated environmental tests
- 3.4.4 Stress concentration at joint
- 3.4.5 Fretting fatigue
- 3.4.6 Residual stress
- 3.5 Design of the bridge
- 3.6 Failure sequence
- 3.7 Aftermath
- Keep on learning
Study this free course
Enrol to access the full course, get recognition for the skills you learn, track your progress and on completion gain a statement of participation to demonstrate your learning to others. Make your learning visible!
Introduction to structural integrity
Structural integrity is the study of the safe design and assessment of components and structures under load, and has become increasingly important in engineering design. It integrates aspects of stress analysis, materials behaviour and the mechanics of failure into the engineering design process.
This unit is an adapted extract from the Open University course
Copyright & revisions
Originally published: Wednesday, 20th July 2011
Last updated on: Wednesday, 20th July 2011
- Creative-Commons: The Open University is proud to release this free course under a Creative Commons licence. However, any third-party materials featured within it are used with permission and are not ours to give away. These materials are not subject to the Creative Commons licence. See terms and conditions. Full details can be found in the Acknowledgements and our FAQs section.
- This site has Copy Reuse Tracking enabled - see our FAQs for more information.
If you enjoyed this, why not follow a feed to find out when we have new things like it? Choose an RSS feed from the list below. (Don't know what to do with RSS feeds?)
Remember, you can also make your own, personal feed by combining tags from around OpenLearn.
All our alternative formats are free for you to download, for more information about the different formats we offer please see our FAQs. The most frequently used are Word (for accessibility), PDF (for print) and ePub and Kindle to download to eReaders*.
*Please note you will need an ePub and Mobi reader for these formats.