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Old 07-30-2013, 07:23 PM   #481 (permalink)
NeilBlanchard
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Data collection has begun!

As originally intended, the jig was putting way too much stress on the samples - it is ~163.5lbs** and the strongest sample (the 10oz E-glass w/ rough surface) failed by compressing along the bearing rod. ** I made a further revision to the formula, and I'm pretty sure this is now correct.

So, I calculated the pressure at the next 5 segments; each a foot farther away from the pivot point. These are the pressures with the 2x6 weight alone:

#0 = 163.5lbs = 2lbs + (17lbs x 9.5')
#1 = 116.5lbs = 6lbs + (13lbs x 8.5')
#2 = 77.5lbs = 10lbs + (9lbs x 7.5')
#3 = 46.5lbs = 14lbs + (5lbs x 6.5')
#4 = 23.5lbs = 18lbs + (1lbs x 5.5')
#5 = 19lbs = 19lbs + (0 x 0) - this is slightly beyond halfway and so #6 and up won't be different.

I'll post the raw data along with a dimensioned drawing soon - I've done 30 out of 72 measurements.

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