from The Open University
Alternatively you can skip the navigation by pressing 'Enter'.
OU on the BBC- Wanted: A Very Personal Assistant: Episode TwoSaturday, 1st August 2015 03:00 - BBC ThreePushed further out of their comfort zones, how will our new carers cope? Read more: OU on the BBC- Wanted: A Very Personal Assistant: Episode Two
Life In Cold Blood: The Cold-Blooded TruthMonday, 3rd August 2015 09:00 - Eden
A History of Ideas: How can I know anything at all?Monday, 3rd August 2015 12:04 - BBC Radio 4
Life In Cold Blood: The Cold-Blooded TruthMonday, 3rd August 2015 15:00 - Eden
OU on the BBC- Wanted: A Very Personal Assistant: Episode TwoAvailable until Thursday, 3rd September 2015 02:55Pushed further out of their comfort zones, how will our new carers cope? Read more: OU on the BBC- Wanted: A Very Personal Assistant: Episode Two
A History of Ideas: Writer Lisa Appignanesi on the Love of ChildrenAvailable for over a year
The Met: Policing London: Episode FiveAvailable until Friday, 7th August 2015 01:50
A History of Ideas: Psychotherapist Mark Vernon on FreudAvailable for over a year
Do animals have sex for fun?How was it for Fido? Do animals approach sex in more than a - well, animalistic - way? Read more: Do animals have sex for fun?
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
Beginners’ Italian: food and drinkThis free course, Beginners’ Italian: food and drink, focuses on buying drinks and snacks in an... Try: Beginners’ Italian: food and drink now
English: skills for learningThis course is for anybody who is thinking of studying for a university degree and would like to... Try: English: skills for learning now
Introduction to structural integrity
The I-35W bridge collapse in Minneapolis in August 2007, resulting in at least 13...
The I-35W bridge collapse in Minneapolis in August 2007, resulting in at least 13 deaths, illustrates the importance of structural integrity. This unit 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
Study this free course
Enrol to access the full course, get recognition for the skills you learn and track your progress. 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
- 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 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.