TY - JOUR
T1 - Detection and characterisation of disbonds on Fibre Metal Laminate hybrid composites by flying laser spot thermography
AU - Pitarresi, Giuseppe
AU - Cerniglia, Donatella
AU - Montinaro, Nicola
PY - 2017
Y1 - 2017
N2 - In this work a novel data collection and processing is proposed for the Infrared Non-Destructive Testing (IR-NDT) of interlaminar disbonds on Fibre Metal Laminate (FML) hybrid composites. The adopted active IR-NDT scheme uses a pointwise laser heat source that is moved along a raster scanning trajectory over the object surface. A Focal Plane Array IR camera is employed to acquire the thermal field generated by the moving heat source. Disbonds defect signatures are then searched by analysing the perturbations of the temperature distribution over a reference area following the heat source. The proposed methodology has been implemented on a GLARE sample, since this class of FMLs has gained extensive use in aerospace structures. In particular, a sample of GLARE 1 3/2–0.3 was manufactured in-house, containing triangular shaped artificial disbonds at different interlayers. The novel inspection approach was able to detect the position, size and to some extent the shape of interlaminar defects by recording the changes in standard deviation of the temperature over the monitored area. The sensitivity found in detecting disbonds proposes the presented methodology as a potential alternative to more conventional inspection routes for FMLs.
AB - In this work a novel data collection and processing is proposed for the Infrared Non-Destructive Testing (IR-NDT) of interlaminar disbonds on Fibre Metal Laminate (FML) hybrid composites. The adopted active IR-NDT scheme uses a pointwise laser heat source that is moved along a raster scanning trajectory over the object surface. A Focal Plane Array IR camera is employed to acquire the thermal field generated by the moving heat source. Disbonds defect signatures are then searched by analysing the perturbations of the temperature distribution over a reference area following the heat source. The proposed methodology has been implemented on a GLARE sample, since this class of FMLs has gained extensive use in aerospace structures. In particular, a sample of GLARE 1 3/2–0.3 was manufactured in-house, containing triangular shaped artificial disbonds at different interlayers. The novel inspection approach was able to detect the position, size and to some extent the shape of interlaminar defects by recording the changes in standard deviation of the temperature over the monitored area. The sensitivity found in detecting disbonds proposes the presented methodology as a potential alternative to more conventional inspection routes for FMLs.
KW - Ceramics and Composites
KW - Hybrid
KW - Industrial and Manufacturing Engineering
KW - Laser thermography
KW - Layered structures
KW - Mechanical Engineering
KW - Mechanics of Materials
KW - Non-destructive testing
KW - Thermal analysis
KW - Ceramics and Composites
KW - Hybrid
KW - Industrial and Manufacturing Engineering
KW - Laser thermography
KW - Layered structures
KW - Mechanical Engineering
KW - Mechanics of Materials
KW - Non-destructive testing
KW - Thermal analysis
UR - http://hdl.handle.net/10447/205650
M3 - Article
VL - 108
SP - 164
EP - 173
JO - Composites Part B: Engineering
JF - Composites Part B: Engineering
SN - 1359-8368
ER -