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RE: [PSUBS-MAILIST] Information Needed for HDPE
Steve
When I plug the numbers in to Row 24 column B (Cylinder Yielding [T/OD]
reads "NUM!" This happens when I put in the Yield stress of 0.10E6
Thanks for all your help on this
Alex
-----Original Message-----
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org]On Behalf Of Steven Mills
Sent: Sunday, June 08, 2003 1:50 PM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Information Needed for HDPE
>From: Alex Varouxis <alex@associateddesign.com>
>
> Below are the Mechanical properties of the pipe. I'm unclear what I should
> input into in your xls file. I have located the Posions Ratio which is .4.
>
> Alex
First, don't take these values as gospel. I have a range for HDPE of
.40 to .46 Each manufacturer has a ratio determined by their own
labs and tests. So, consider these values as approximations. And
don't *completely trust* programs like this XLS calculator.
However, my tables for Polyethylene HDPE is .40
Young's Modulus is 0.29E6 and the Shear Modulus is
0.10E6 ( 0.71 GPa )
*[ anyone...jump in and please correct this if you have
different values ! ]*
For the "xls" calculator these are the values to input in
Row 24 ( the blue highlights ).
However, I'm still looking for that other program which might be
better suited to your project.
--Steve
> Mechanical Properties
>
>
> Hardness, Shore D 63 - 68 63 - 68 Average = 65.6; Grade Count = 12
> Tensile Strength, Ultimate 31 - 34 MPa 4500 - 4930 psi Average =
> 32.5 MPa; Grade Count = 12
> Tensile Strength, Yield 19 - 23 MPa 2760 - 3340 psi Average = 21.6
MPa;
> Grade Count = 12
> Elongation at Break 400 - 800 % 400 - 800 % Average = 770%;
> Grade Count = 12
> Flexural Modulus 0.79 - 0.9 GPa 115 - 131 ksi Average = 0.85
GPa;
> Grade Count = 12
> Izod Impact, Notched 3.2 - 5.3 J/cm 5.99 - 9.93 ft-lb/in Average =
> 3.9 J/cm; Grade Count =
>
>
> -----Original Message-----
> From: owner-personal_submersibles@psubs.org
> [mailto:owner-personal_submersibles@psubs.org]On Behalf Of Steven Mills
> Sent: Saturday, June 07, 2003 10:46 PM
> To: personal_submersibles@psubs.org
> Subject: Re: [PSUBS-MAILIST] Information Needed for HDPE
>
> >From: Alex Varouxis <alex@associateddesign.com>
> >
> > > Thanks for the calculator it will be useful for future use.
> > > Unfortunately the web site
http://www.matweb.com/search/SearchSubcat.asp
> > > that you and Rodger directed me to does not contain the required data
> for
> > > Pipe Grade HDPE.
> > > Any suggestions?
> > >
> > > Alex
>
> First, I'm still looking for my data / tables. But !...go back to
"matweb"
>
> http://www.matweb.com/search/SearchSubcat.asp
>
>
> under the search for "Thermoplastic Polymers" go down to the
> "polyethylene" . HDPE is listed in this category. However, be
> ready for a long list ! Look on your HDPE pipe for any coding.
> This may give you a clue as to the type.
>
> --Steve
>