WIT Press


In Situ Crack Propagation Monitoring In Aerospace Structures By Digital Sensor

Price

Free (open access)

Paper DOI

10.2495/CMEM970171

Volume

17

Pages

14

Published

1997

Size

1,164 kb

Author(s)

M. Marchetti & G. Pisciolini

Abstract

In situ Crack Propagation Monitoring in Aerospace Structures by Digital Sensor M. Marchetti, G. Pisciolini University of Rome "La Sapienza ", Aerospace Department Via Eudossianan. 16, 00184 Rome, Italy ABSTRACT The aim of this paper was to develop a passive system sensor in order to analyse the rise and behaviour of crack propagation coming into the surface in a plane structural elements. The peculiarity of this system is to monitor the condition of the residual reliability of the structural element following a progressive damage, in situ and in the normal load condition which it has to provide. The sensor is made by a film which support a grid, row-column, of electric conductor which will be subsequently attached on the surface of the structural object. The propagation of the defect is noticed observing the progressive interruption of the electric contact on the surface row-column of the grid. To collect information of on-off type from the sensor it was realised

Keywords