RT Journal Article
T1 Optical sensing of the fatigue damage state of CFRP under realistic aeronautical load sequences
A1 Zuloaga-Ramirez, Pablo
A1 Arconada, Alvaro
A1 Frövel, Malte
A1 Belenguer, Tomas
A1 Salazar, Felix
AB Abstract: We present an optical sensing methodology to estimate the fatigue damage stateof structures made of carbon fiber reinforced polymer (CFRP), by measuring variations on the surface roughness. Variable amplitude loads (VAL), which represent realistic loads during aeronautical missions of fighter aircraft (FALSTAFF) have been applied to coupons until failure. Stiffness degradation and surface roughness variations have been measured during the life of the coupons obtaining a Pearson correlation of 0.75 between both variables.The data were compared with a previous study for Constant Amplitude Load (CAL) obtaining similar results. Conclusions suggest that the surface roughness measured in strategic zones is a useful technique for structural health  monitoring of CFRP structures, and that it is independent of the type of load applied. Surface roughness can be measured in the field by optical techniques such as speckle, confocal perfilometers and interferometry, among others.
PB MDPI AG
SN 1424-8220
YR 2015
FD 2015-03-09
LK https://hdl.handle.net/20.500.14352/23042
UL https://hdl.handle.net/20.500.14352/23042
LA eng
DS Docta Complutense
RD 18 abr 2025