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Re: [majid_sabet] Slackline Load Testing Experiment:
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slacklinejoe
May 11, 2008, 4:26 PM
Views: 16077
Registered: Nov 5, 2003
Posts: 1423
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The elasticity of webbing is a most peculiar thing. I've done just that before I had the load tester and it had lost most of it's tension in that time. When re-tensioned back to where I wanted it, it still slowly loosened up even more.
I do want to point out that it may not be ideal to make the webbing enter into a static condition. It might make testing easier but it will skew the numbers significantly from what normal slacklining will produce. In the mean time, I'd rather adjust for pre-load decay during testing and have numbers people can use. If anything else, the system acts as I giant load limiter, which is actually good for safety.
To give you an example, I set up the line at 650lbs. I watched it drop down to 580 during a break. I reset it at 650 and watch it drop slowly. I leaned against the line, let up, and looked at the scale - down to 590. I kept re-tensioning it in between each measurement but all in all after over an hour at the same tensiong (after spending 2 hours stretching out at lower tensions) it was still stretching.
The odd part is to my feet, this was inpercievable until it lost closer to 100 lbs of lost pre-load. In parts I think I perceived that I was getting used to the higher tensions when in fact the tensions had finally dropped closer to what I'm used to.
(This post was edited by slacklinejoe on May 11, 2008, 4:37 PM)
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Post edited by slacklinejoe
() on May 11, 2008, 4:37 PM
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