8/10/2019 Composites MSc NDT Assignment 2011-12

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8/10/2019 Composites MSc NDT Assignment 2011-12

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be determined to 4% and the winding angle to 30. After the end fittings are bonded, it is necessary todetect any disbonds larger than 5 mm in diameter and also to detect any areas where the porosity in thebondline exceeds about 10%. The production rate is expected to be 500 per week.

You are to prepare a report for your manager outlining the possible inspection techniques and justifying thesystem which you propose. If different options are possible, you should state clearly their relativeadvantages and disadvantages. You must provide your manager with sufficient information (not including

exact costings) to enable him/her to make an outline investment case to the board. You must thereforemake clear what system(s) you recommend and give approximate costs (i.e. will it be 1k, 5k, 10k, 50k,100k ). This is more important than great detail about the background to different NDT techniques youonly need include sufficient background information to justify your choice of technique. There is no needto regurgitate lecture notes, and only a very few words are required to eliminate methods that areclearly unsuitable. You should discuss in detail how the tests will be carried out - what equipmentis needed, how i t wi ll be set up, what measurements are involved etc.

Bibliography

1. Halmshaw, R. 'Non-Destructive Testing', Edward Arnold, 1987.

2. Summerscales, J. (ed) 'Non-Destructive Testing of Composite Materials', Vol 1 (1987), Vol 2 (1990),

Elsevier Applied Science.

3. NDT course notes.

4. Adams, R.D. and Cawley, P. 'A survey of defect types and non-destructive testing techniques forcomposite materials and bonded joints', NDT International, Vol 21, pp208-222, 1988.

CFRP (wall thicknessapprox 3 mm)

Aluminiumend fitting

adhesive (thicknessapprox 100 m)

400 mm

25 mm

Not to scale

60 mm

Schematic Diagram of Drive Shaft Assembly