|To err is human, but to really get things wrong requires an engineer...
||[Jan. 17th, 2004|05:57 pm]
|||||extremely stupid and embarrassed...||]|
I finally began to write the 10-page report for the structural design project this afternoon. However, as I was working through the "complete set of hand calculations" they insist that you record, I noticed that one of the results seemed rather different from the result I had obtained with a spreadsheet last term, on the basis of which I and my partner constructed the cantilever.
It turns out that I inserted a factor of 2 into the calculation for the strength of a couple of the struts where probably I should not have done with the result that instead of supporting more than 2kN before failing it may manage 1.1kN or so, and then collapse. Fortunately my partner is taking it very kindly, but I have probably caused both of us to lose a fair few of the marks we should have got towards our end-of-year total. I think I shall be careful to recalculate things, or at least ask them to be checked, in future.
And if (which I hope I don't) I ever design a bridge I would recommend that you never cross it!