Application of Different X-ray Techniques to Improve In-Service Carbon Fiber Reinforced Rope Inspection

Evaluation of Different Non-destructive Testing Methods to Detect Imperfections in Unidirectional Carbon Fiber Composite Ropes

“…The delaminations are typically located in the middle of the specimen parallel to the XZplane and they extend through the width. The microstructure and damage morphology has been described in detail earlier [7].…”

“…Several methods for inspection of fiber ropes have been suggested, such as methods based on the electrical resistivity of the fibres [4,5] and optical methods monitoring modal parameters [6]. X-ray inspection can give high-resolution volumetric information of the damage state of a rope [7], but inspection speeds are slow for online monitoring and there is a large volume to be inspected. Electrical resistivity works well for small samples [8], but it does not provide information on the location of damage.…”

A Multiscale Modelling Approach for Estimating the Effect of Defects in Unidirectional Carbon Fiber Reinforced Polymer Composites

“…The third step in the workflow involves using the critical locations for defining displacements and boundary conditions for the RVE so that they are relevant with the practical application in mind. The effect of known defects found using advanced non-destructive testing [16] or postulated defects can now be evaluated in microscale with loading conditions relevant to real-life applications. The simulated failure strength of a defective component can thus be calculated and compared to experimentally obtained failure loads.…”

“…It could provide a means to simulate the response of a structure as a function of different sizes and types of damage occurring during service, and hence be integrated in relevant condition monitoring systems. It also allows for continued assessment and provides better information as to the required actions when damage is found and characterized via non-destructive evaluation [16]. In other words, it furthers the ability to determine the residual strength and evaluate whether or not a component can continue in service.…”

A Multiscale Modelling Approach for Estimating the Effect of Defects in Unidirectional Carbon Fiber Reinforced Polymer Composites

“…However, distinguishing between fiber and matrix from microtomography voxel data was found to be unreliable and therefore a 2.5D approach was selected. Completely straight fibers are assumed although the tomography data [16] and transverse cross-sections [3] indicate some fiber waviness. 2D data from cross-sections imaged using variable pressure scanning electron microscopy (VP-SEM) and backscatter electron (BSE) detection are used.…”