Using infrared spectroscopy in combination with multivariate data analysis to predict residual strength of carbon fiber reinforced polymers after one‐sided thermal loading

• DOI: 10.1002/pc.26136
• Publication Date: 2021-05-27T01:37:45Z
• Authors: Tanja Marina Vetter; Felix Zimmer; Sebastian Eibl; Hans‐Joachim Gudladt
• Keywords: Delamination; Attenuated total reflection

Abstract In this study, structural, mechanical, and chemical changes of one‐sided thermally loaded carbon fiber reinforced polymers (CFRPs) are investigated. The aim is to test reliably predict residual strength delamination depth by using infrared spectroscopy. CFRP different thicknesses (HexPly® 8552/IM7) were irradiated at varying heat fluxes over various time intervals. inhomogeneously distributed matrix degradation was analyzed means attenuated total reflection Fourier transform spectroscopy with a resolution 0.2 mm. Residual interlaminar shear (ILSS) determined microfocused computed X‐ray tomography used measure the depth. Principal component analyses performed show which information in spectra affected thermal loading. Furthermore, combination taken depths can be develop partial least squares regression models ILSS Despite an inhomogenous distribution damage, precise predictions considering sample achieved.