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Fwd: sas_cif dictionary
- Subject: Fwd: sas_cif dictionary
- From: "John D. Barnes" <john.barnes@nist.gov>
- Date: Mon, 26 Apr 1999 10:14:03 -0400
Dear Colleagues; Marc Malfois is the point man for the sas CIF dictionary. He wrote to me asking about descriptive measures and units for recording the state of strain of a specimen. In my own experience I have seen strain appear in a variety of ways: 1. Uniaxial stretch of sheets, films, or fibers 2. Biaxial stretch 3. Plane strain compression 4. Steady shear parallel plate, cone and plate, or Couette geometries 5. Extrusion of sheets or fibers The common ground is the strain tensor. The elements of this take various forms depending on the nature of the deformation. My rheologist acquaintances tell me that SAS practitioners tend to be somewhat careless about describing this, so Marc's question is a really good one. I decided to pass this along to the rest of the sa-scat list in the hope that some other people would be able to add their views and experience. Please reply to Malfois@embl-hamburg.de. The idea that a description of the state of the specimen should be embedded in the output data file is fundamenmtal to our ability to exchange data between laboratories in a manner that allows us to analyze and understand it (this is a sales pitch for CIF and the canSAS II workshop). Thank You Dr. John D. Barnes email: john.barnes@nist.gov Natl Inst of Stds and Tech Voice: 301-975-6786 100 Bureau Drive, Stop 8544 FAX: 301-975-4977 Gaithersburg, MD 20899 URL: http://www.nist.gov/sas or http://polymers.msel.nist.gov/staff/detail.cfm?SID=110
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