Issue 77

A. Casaroli et alii, Fracture and Structural Integrity, 77 (2026) 89-106; DOI: 10.3221/IGF-ESIS.77.07

surface of the fibres can be observed, which are traces of resin from the previous polymer matrix. Backscattered electron and X-ray microchemical analysis reveal the presence of less than 1% particles composed of Al, Si, and Ca, which likely originate from glass fibres or ceramic particles from the grinding system used in the recycling process.

Figure 4: SEM analysis of recycled fibre powder with secondary (left) and backscattered (right) electrons at 500x, 1000x, and 5000x magnifications. Tensile tests To facilitate a comparative analysis of the effects of thickness and the volumetric distribution of defects on tensile properties, the material were divided into two different laminate configurations:

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