Issue 77

E. Lobov et alii, Fracture and Structural Integrity, 77 (2026) 13-26; DOI: 10.3221/IGF-ESIS.77.02

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g) i) Figure 8: Morphology of fractured samples: (a) ABS+CCF 30, (b) ABS+CCF 45, (c) ABS+CCF 60, (d) PA12+CCF 30, (e) PA12+CCF 45, (f) PA12+CCF 60, (g) PET-G +CCF 30, (h) PET-G +CCF 45, (i) PET-G +CCF 60. From an engineering perspective, the results allow to establish a design principle: for components subjected predominantly to uniaxial or bending loads, reinforcement architectures must include fiber layers aligned with the principal load direction. Off-axis layers should be used strategically to improve damage tolerance and shear resistance. At higher layup angles, the role of process quality, such as fiber impregnation, interfacial adhesion, and interlayer bonding, becomes increasingly critical, as the composite response transitions from fiber-dominated to matrix- and interface-controlled.

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