Collar for measuring the lateral deformation of a test piece during compression tests, such as uniaxial or triaxial compression tests
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United States of America Patent
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Apr 13, 2010
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app pub date -
May 22, 2006
filing date -
May 24, 2005
priority date (Note) -
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Abstract
The invention relates to a collar for measuring the lateral deformation of a test piece during uniaxial or triaxial compression tests. According to the invention, the collar includes a metal hoop or a hoop that is made from composite materials, which can clasp the test piece and which is open. The free ends thereof are separated by a distance Δ. The inventive collar also includes a mechanism for directly or indirectly measuring the distance Δ. Between the free ends of the hoop, the mechanism includes at least one strain gauge.
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