Originally Posted by lerman  How did you select your material? Why is it plastic rather than metal? Why is it 1cm thick? Why not thinner? What is its purpose? How precise does it have to be?
To spin it from metal, a form is made (of wood). The form (called a mandrel) is mounted on a special lathe. Then a blank of metal is placed and held against the mandrel while both are spun in the lathe. The metal is then pushed against the mandrel and the metal takes the shape of the form.
Ken |
The dome will be used to perform stress analysis when it is subjected to various load such as internal pressure. Plastic is chosen because the load subjected to it for destructive test wouldn't be that high if compared to metal. The thickness of the dome is only my estimation until I discuss with my supervisor, it might less than 1CM. I hope the precision of its size is as high as possible so that its answer can agree very well with my theoretical solution.