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Entry  Tue Jul 13 13:56:29 2010, Gopal, Configuration, Optic Stacks, Vitol Material Properties 
    Reply  Wed Jul 14 19:00:56 2010, Gopal, Configuration, Optic Stacks, Vitol Material Properties, REVISED 
Message ID: 3222     Entry time: Wed Jul 14 19:00:56 2010     In reply to: 3206
Author: Gopal 
Type: Configuration 
Category: Optic Stacks 
Subject: Vitol Material Properties, REVISED 

Quote:

Viton flouroelastomers have somewhat variable material properties. The following parameters are being used for eigenfrequency analysis.

Young's Modulus: 72,500-87,000 psi (cite: http://www.row-inc.com/pfa.html) *Accurate for PFAs

Poisson's Ratio: 0.48-0.50 (cite: http://www.engineeringtoolbox.com/poissons-ratio-d_1224.html) *Accurate for rubber

Density: 1800 kg/m^3 (cite: http://physics.nist.gov/cgi-bin/Star/compos.pl?matno=275)

 The Young's Modulus for PFA turned out to be orders of magnitude greater than for Viton. The revised values produced much more accurate results:

Young's Modulus for Viton-75: 1950 psi or 6.6 MPa

(Courtesy Row, Inc. and Steve Vass)

This website contains other details: http://www.row-inc.com/viton.html

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