Method for monitoring the state of a composite structure and pressurized fluid reservoir having a device performing said method
First Claim
1. A method for monitoring in situ over a period of time a composite structure having a given total surface and comprising at least a first part including at least two layers formed from different materials and adjacent one another along a given interface, said structure being subject to a uniform pressure applied over said total surface, said method comprising the following stages:
- measuring in situ at a time t a deformation or stress level of said structure, produced by said uniform pressure by a monitoring means positioned at said interface; and
comparing the measured deformation or stress level with a reference deformation or stress level of said structure at a time t0, produced by said uniform pressure.
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Accused Products
Abstract
To monitor the operating state of a composite structure formed from at least two different materials and subject to a uniform force or load over its entire surface, the deformation at the interface between the two materials is measured. A comparison with a reference quantity of the structure, normally produced by the force applied thereto, indicates the operating state. When the composite structure forms the wall (14) of a reservoir (10), monitoring takes place in an instrumentation box (30) joined to the reservoir. When a critical threshold is exceeded, an alarm indicator (32) is triggered on the box (30).
8 Citations
51 Claims
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1. A method for monitoring in situ over a period of time a composite structure having a given total surface and comprising at least a first part including at least two layers formed from different materials and adjacent one another along a given interface, said structure being subject to a uniform pressure applied over said total surface, said method comprising the following stages:
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measuring in situ at a time t a deformation or stress level of said structure, produced by said uniform pressure by a monitoring means positioned at said interface; and
comparing the measured deformation or stress level with a reference deformation or stress level of said structure at a time t0, produced by said uniform pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A pressurized fluid reservoir comprising:
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at least a first part formed from a composite wall formed from an envelope and a reinforcement of long, resin-impregnated fibres adjacent one another along a given interface; and
at least one first transducer integrated into the composite wall at the interface between the envelope and the reinforcements, so as to permit an in situ monitoring of a state of the wall, by comparing a stress level or deformation measured by the first transducer with a reference stress level or deformation of the wall, produced by the uniform pressure of the fluid applied over a total surface of the pressurized fluid reservoir. - View Dependent Claims (16, 17, 18, 19)
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20. A method for monitoring the state of a composite structure, the method comprising the steps of:
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exposing the composite structure to a uniform non pressure applied over a total surface of the composite structure, the composite structure having an envelope layer and a reinforcement layer adjacent the envelope layer forming an interface between the envelope layer and reinforcement layer, said envelope layer and said reinforcement layer having different materials;
measuring a deformation or stress level of the composite structure at the interface; and
comparing the measured deformation or stress level of the composite structure at the interface with a reference quantity. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A method for monitoring the state of a composite structure, the method comprising the steps of:
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exposing the composite structure to a uniform pressure applied over a total surface of the composite structure, the composite structure formed from at least two different materials adjacent one another along a given interface;
measuring a deformation or stress level of the composite structure at the interface; and
comparing the measured deformation or stress level of the composite structure at the interface with a reference quantity. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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47. A container for containing a pressurized fluid, the container comprising:
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an envelope layer;
a reinforcement layer of long resin-impregnated fibers adjacent the envelope layer along an interface, said envelope layer and said reinforcement layer having different materials; and
a first transducer positioned at the interface to permit in situ monitoring of a state of the interface, wherein the container is subject to uniform pressure applied over a total surface of the container. - View Dependent Claims (48, 49, 50, 51)
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Specification