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newstart2k
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Join Date: Jun 2011
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FRP Profile Testing

08/11/2011 8:49 AM

I have the need to check an FRP profile (round rod) for internal microvoids in line during production. The profiles may be as large as 5" in diameter. We currently use a post-production water bath ultrasound system. This works but is very inefficient, labor wise. Any thoughts?
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RVZ717
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#1

Re: FRP Profile Testing

08/11/2011 8:00 PM

No chance of a quick post production destructive sample per batch?

When you can do destructive testing, it usually gives the most information, you can take a slice, and examine it thoroughly for defects.

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jgjengr
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Join Date: Jul 2008
Location: Norfolk, VA
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#2

Re: FRP Profile Testing

08/12/2011 7:18 AM

Are you in control and capable? Can you go to an audit? Otherwise, sectioning or ultrasonic are the only options I can think of.
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newstart2k
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#3

Re: FRP Profile Testing

08/12/2011 8:28 AM

I should have mentioned that due to the nature of the production proocess and the requirements of our customer 100% product testing is required.
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NKT
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Join Date: Aug 2011
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#4

Re: FRP Profile Testing

08/12/2011 10:02 AM

I think Archimedes solved this problem some time back. Since it is round, the mass calculation should be trivial.
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jgjengr
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#5
In reply to #4

Re: FRP Profile Testing

08/12/2011 10:14 AM

I'd be surprised in FRP if their diameter is consistant enough to measure it by mass - especially if you're inspecting for delaminations and not just porosity.
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Randall
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#6
In reply to #4

Re: FRP Profile Testing

08/12/2011 11:15 AM

for internal microvoids

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NKT
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Join Date: Aug 2011
Posts: 18
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#7

Re: FRP Profile Testing

08/12/2011 5:51 PM

If it is internal microvoids and delaminations, then ultrasound is the only option I know of. Backscatter X-ray might be possible, but I don't know about how small a void it would pick up.

Composites are notoriously hard to test.
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