Method of monitoring a composite material
First Claim
1. A method for monitoring a composite material constituting an aircraft structure comprising an epoxy resin filled with electrically conductive nanoparticles, at least one electrical property of said composite material being influenced by being subjected to a mechanical deformation, said method providing for inserting said composite material in an electric circuit emitting an electric signal whose value depends on said electrical property, so that, when the value of said signal overcomes a given threshold value, a warning message is delivered, wherein said electrical property is the electrical impedance, and said warning message is delivered when a crack of at least 1 nm is formed within said aircraft structure.
1 Assignment
0 Petitions
Accused Products
Abstract
The method allows to monitor a composite material comprising an epoxy resin filled with electrically conductive nanoparticles, wherein at least one electrical property i.e. impedance of the composite material is influenced by being subjected to a mechanical deformation. The method provides for inserting the composite material in an electric circuit emitting an electric signal whose value depends on the electrical property, so that, when the value of the signal overcomes a given threshold value, a warning message is delivered.
11 Citations
20 Claims
- 1. A method for monitoring a composite material constituting an aircraft structure comprising an epoxy resin filled with electrically conductive nanoparticles, at least one electrical property of said composite material being influenced by being subjected to a mechanical deformation, said method providing for inserting said composite material in an electric circuit emitting an electric signal whose value depends on said electrical property, so that, when the value of said signal overcomes a given threshold value, a warning message is delivered, wherein said electrical property is the electrical impedance, and said warning message is delivered when a crack of at least 1 nm is formed within said aircraft structure.
- 13. A method for monitoring a composite material constituting an aircraft structure comprising an epoxy resin filled with electrically conductive nanoparticles, at least one electrical property of said composite material being influenced by being subjected to a mechanical deformation, said method providing for inserting said composite material in an electric circuit emitting an electric signal whose value depends on said electrical property, so that, when the value of said signal overcomes a given threshold value, a warning message is delivered, wherein said electrical property is the electrical impedance, and a Young'"'"'s modulus of said composite material is in the range 500 to 3000 MPa at room temperature.
Specification