Collar for measuring the lateral deformation of a test piece during compression test, such as uniaxial or triaxial compression tests
US7520177B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 22, 2006 |
| Grant date | Apr 21, 2009 |
| Priority date | — |
| Expiry date | May 22, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a collar for measuring 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. When the hoop is open, the free ends thereof are separated by a distance Δ. The inventive collar is also equipped with a measurement device for directly or indirectly measuring the distance Δ. Between the free ends of the hoop, the device can be a linear variable differential transformer-type probe. The invention also relates to a protective sleeve for the test piece, which can co-operate with the collar.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.