Correlation Study of IR TNDT Analysis with Structural Failure Modes of Carbon-Fabric-Reinforced Epoxy Composites

Abstract

In the present work, a generic experimental investigation procedure was developed on mechanical characterization and testing of carbon fabric/epoxy material under uniaxial tensile loading condition. In this study, using IR Thermographic NDT, the defects are identified by measuring changes in temperature online during testing and by taking temperature contour images on the surface of the composite samples. The unidirectional elastic properties such as tensile modulus, in-plane shear modulus, Poisson's ratio, and strength parameter like ultimate tensile strength, shear strength are reported. The estimated mechanical properties of carbon fabric/ epoxy composite were statistically analysed in this work using the Weibull distribution. In addition, emphasis on the microstructural investigation using Scanning Electron Microscope (SEM) is given, in order to study the fracture mechanism of the carbon fabric/epoxy composite under uniaxial tensile loading. The failure surfaces of the tensile tested carbon fabric/epoxy specimens were examined by SEM and the detailed fracture process such as matrix cracking, fiber pull outs and delamination are observed and discussed.

Experimental and numerical studies on the low‐velocity impact response of carbon fiber‐reinforced polymer anisogrid cylindrical shells

“…In contrast, a uniform distribution of IR radiation is seen in Figure 13 because of no defects in the specimen. A similar work has been reported in the literature [37] on inspection of composite materials using IR thermography. The temperature contours and IR Thermography test results of all the tested samples are not included in this article just for the sake of brevity.…”

Compression properties of three-dimensional I-shaped woven composites with basalt fiber filament tows

“…[1][2][3] Most ordinary I-shaped composites were pressed with plate material, and the processing method was simple, but for the poor integrity of ordinary I-shaped composites which were easy to crack. 4,5 Compared with ordinary I-shaped composites, three-dimensional (3D) I-shaped composites have many advantages, such as lighter weight and lower cost. 6 Therefore, more experts and scholars began to focus on the study of the properties of composites.…”

“…1–3 Most ordinary I-shaped composites were pressed with plate material, and the processing method was simple, but for the poor integrity of ordinary I-shaped composites which were easy to crack. 4,5…”