Device For Measuring Endogenous Deformations
AssigneesCentre National de la Recherche Scientifique (CNRS), Universite De Nantes
InventorsPascal CASARI, Nordine LEKLOU, Yves POUZAINT, Damaris ROSSETTI
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Abstract
Device for measuring the endogenous deformations of a structure of materials, during the transition of said structure from a liquid phase to a solid phase, comprising: a uniaxial test body suitable for being embedded in the structure; a deformation measurement fiber attached to the interior of the test body; a system connected to the measurement fiber and suitable for detecting signals representative of the deformations of the measurement fiber and for determining the endogenous deformations from these signals and from known mechanical properties of the materials of the test body, the test body having a rigidity comprised between 2 and 5 gigapascals.
Claims16
A device for measuring the endogenous deformations of a structure during the transition of said structure from a liquid phase to a solid phase, the device comprising:
- at least one uniaxial test body extending between a first end and a second end, said at least one test body being suitable for embedding in the structure and being made of homogeneous flexible material with known mechanical properties,
- a deformation measurement fiber attached to inside the at least one test body, such that deformations of the at least one test body are transmitted to the measurement fiber,
- a system connected to the measurement fiber and suitable for detecting signals from the measurement fiber that are representative of the deformations of the measurement fiber and for determining the endogenous deformations from at least one of the detected signals and from known mechanical properties of the materials of the test body,
- the at least one test body having a rigidity comprised between 2 and 5 gigapascals.
A mechanical structure comprising a measurement device for measuring the endogenous deformations of a structure during the transition of said structure from a liquid phase to a solid phase, the device comprising:
- at least one uniaxial test body extending between a first end and a second end, said at least one test body being suitable for embedding in the structure and being made of homogeneous flexible material with known mechanical properties,
- a deformation measurement fiber attached to inside the at least one test body, such that deformations of the at least one test body are transmitted to the measurement fiber,
- a system connected to the measurement fiber and suitable for detecting signals from the measurement fiber that are representative of the deformations of the measurement fiber and for determining the endogenous deformations from at least one of the detected signals and from known mechanical properties of the materials of the test body,
- the at least one test body having a rigidity comprised between 2 and 5 gigapascals.
A method for measuring endogenous deformations of a structure during the transition of said structure from a liquid phase to a solid phase, said method comprising the following steps:
- installing a device for measuring the endogenous deformations of a structure during the transition of said structure from a liquid phase to a solid phase, the device comprising:
- at least one uniaxial test body extending between a first end and a second end, said at least one test body being suitable for embedding in the structure and being made of homogeneous flexible material with known mechanical properties,
- a deformation measurement fiber attached to inside the at least one test body, such that deformations of the at least one test body are transmitted to the measurement fiber,
- a system connected to the measurement fiber and suitable for detecting signals from the measurement fiber that are representative of the deformations of the measurement fiber and for determining the endogenous deformations from at least one of the detected signals and from known mechanical properties of the materials of the test body,
- the at least one test body having a rigidity comprised between 2 and 5 gigapascals,
- pouring the liquid-phase structure around the measurement device,
- collecting measurements on the system from the measurement device during the solidification phase of the structure.
Dependencies are inferred from the claim text.