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Impact test - 100ft.lbs
Hi, I've got a test standard which states the component must withstand an impact of 100 ft.lbs, I dread to ask this question but I just have to... is this test dropping a weight of 1lb from 100 ft? Therefore a 10lb weight from 10ft? In metric measurements I've worked it as 13.7m kg The reason...- gareth71
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- Replies: 24
- Forum: Mechanical engineering general discussion
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Flat spring takes on permanent set
This is a legacy design made from galvanised spring steel, they were always made to a material spec of BS5216, minimum tensile strength 2500 N/mm2 The supplier is now unable to get this material and we've had samples in different new materials but they all take on a compression set, see the...- gareth71
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- Replies: 11
- Forum: Spring engineering
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Units conversion for impact test - ft.lb to Joules
I've got a US spec which asks for a 100ft.lb impact test done by a drop tube. I almost can't bare to ask this, but what is the height and weight for that test? If it's really a 1 lb weight from 100 feet, or 100lb from 1 foot, that's (please check!) a 5kg weight from 2.8m or 137 Joules. The...- gareth71
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- Replies: 7
- Forum: Mechanical engineering general discussion
